Asa and ips with ha
Hi,
If I use 2 asa 5510 with HA in mode A/A or A/P
Is it possible in A/A mode to use one IPS module, except for security problem ?
Or is it preferable to use asa as A/P.
Regards
I think it is possible to have two ASA with HA in mode A/A to use IPS module. The ASA can also be used in mode A/P which is preferable as it has cost advantage.
Similar Messages
-
IPSEC b/w ASA and Router --- with nat stuff
I need help regarding the following issue..
An asa is connected to a router which is connected to the internet.
A vpn must be established b/w ASA and a router that is over internet . The ASA is not directly connected to the internet. It is connected to a router which nat the Asa outside ip to a static global IP .
All i need to know is that do need any special configs for this . or its the same as if ASA would have been directly connected to the internetIn order to configure a LAN-to-LAN tunnel between a Cisco IOS? router and an Adaptive Security Appliance (ASA), these configurations are required on the ASA:
Configure the crypto ipsec command in Phase 2.
Configure the isakmp policy command.
Configure the nat 0 command and the access-list command in order to bypass NATting.
Configure the crypto-map command.
Configure the tunnel-group DefaultL2LGroup command with group information -
ASA and RADIUS with Password expiry
We currently have a 3015 doing our VPNs. We are looking to move that to our 5520. RADIUS with password epiry is being used for authentication on the 3015 and we would like to continue to use it. Reading the docs for the ASA I have found conflicting answers as to wether or not the ASA supports this.
Please advise with ANY help.
-DougASA does support this...it is no longer referred to as radius with expiry, it the command is now "password-management".
http://cisco.com/en/US/docs/security/asa/asa72/command/reference/p_72.html#wp1725278 -
How do I use Cisco MARS to monitor two ASA (active/stby) with IPS modules?
Hi
The two ASA with IPS modules are in active/standby mode. When I try to add both the two IP (active/standby) into the MARS, the MARS will complain duplicated hostnames.
How to setup MARS to monitor ASA with IPS with active standby topology?
Thanks!Hi,
The fundamental problem with this scenario is that you have non-failover capable modules in a failover chassis - think of the ASA failover pair as one device and the IPS modules as two completely separate devices.
Then, as already mentioned, add only the primary ASA. (The secondary will never be passing traffic in standby mode so it's not actually needed in MARS) Then, with the first IPS module you can add it as a module of the ASA or as a standalone device (MARS doesn't care). With the second IPS module the only option is to add it as a separate device anyway.
In a failover scenario the ASA's swap IP's but the IPS's don't so whereas you'll only ever get messages from the active ASA you'll get messages from both IPS IP's depending on which one happens to be in the active ASA at the time.
Don't forget that you have to manually replicate all IPS configuration every time you make a change.
HTH
Andrew. -
MS NLB with ASA and Static NAT from PUP to NLB IP
Hi all,
I am trying to get MS NLB up and running. It is almost all working. Below is my physical setup.
ASA 5510 > Cat 3750X >2x ESXi 5.1 Hosts > vSwitch > Windows 2012 NLB Guest VMs.
I have two VMs runing on two different ESXi hosts. They have two vNICs. One for managment and one for inside puplic subnet. The inside puplic subnet NICs are in the NLB cluster. The inside public subnet is NATed on the ASA to a outide public IP.
192.168.0.50 is the 1st VM
192.168.0.51 is the 2nd VM
192.168.0.52 is the cluster IP for heartbeat
192.168.0.53 is the cluster IP for NLB traffic.
0100.5e7f.0035 is the cluster MAC.
The NLB cluster is using MULTICAST
I have read the doumentation for both the ASA and CAT switch for adding a static ARP using the NLB IP and NLB MAC.
For the ASA I found
http://www.cisco.com/en/US/docs/security/asa/asa84/asdm64/configuration_guide/mode_fw.html#wp1226249
ASDM
Configuration > Device Management > Advanced > ARP > ARP Static Table
I was able to add my stic ARP just fine.
However, the next step was to enable ARP inspection.
Configuration > Device Management > Advanced > ARP > ARP Inspection
My ASDM does not list ARP Inspection, only has the ARP Static Table area. Not sure about this.
For the CAT Switch I found
http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_example09186a0080a07203.shtml
I added the both the ARP and Static MAC. For the static MAC I used the VLAN ID of the inside public subnet and the interfaces connected to both ESXi hosts.
On the ASA I added a static NAT for my outside Public IP to my inside pupblic NLB IP and vise versa. I then added a DNS entry for our domain to point to the outside public IP. I also added it to the public servers section allowing all IP traffic testing puproses.
At any rate the MS NLB is working ok. I can ping both the Public IP and the Inside NLB IP just fine from the outside. (I can ping the inside NLB IP becuase I'm on a VPN with access to my inside subnets) The problem is when I go to access a webpade from my NLB servers using the DNS or the Public IP I get a "This Page Can't Be Displyed" messgae. Now while on the VPN if I use the same URL but insied use the NLB IP and not the Public IP it works fine.
So I think there is soemthing wrong with the NATing of the Public to NLB IP even tho I can ping it fine. Below is my ASA Config. I have bolded the parts of Interest.
Result of the command: "show run"
: Saved
ASA Version 8.4(4)9
hostname MP-ASA-1
enable password ac3wyUYtitklff6l encrypted
passwd ac3wyUYtitklff6l encrypted
names
dns-guard
interface Ethernet0/0
nameif outside
security-level 0
ip address 198.XX.XX.82 255.255.255.240
interface Ethernet0/1
description Root Inside Interface No Vlan
speed 1000
duplex full
nameif Port-1-GI-Inside-Native
security-level 100
ip address 10.1.1.1 255.255.255.0
interface Ethernet0/1.2
description Managment LAN 1 for Inside Networks
vlan 2
nameif MGMT-1
security-level 100
ip address 192.168.180.1 255.255.255.0
interface Ethernet0/1.3
description Managment LAN 2 for Inside Networks
vlan 3
nameif MGMT-2
security-level 100
ip address 192.168.181.1 255.255.255.0
interface Ethernet0/1.100
description Development Pubilc Network 1
vlan 100
nameif DEV-PUB-1
security-level 50
ip address 192.168.0.1 255.255.255.0
interface Ethernet0/1.101
description Development Pubilc Network 2
vlan 101
nameif DEV-PUB-2
security-level 50
ip address 192.168.2.1 255.255.255.0
interface Ethernet0/1.102
description Suncor Pubilc Network 1
vlan 102
nameif SUNCOR-PUB-1
security-level 49
ip address 192.168.3.1 255.255.255.0
interface Ethernet0/1.103
description Suncor Pubilc Network 2
vlan 103
nameif SUNCOR-PUB-2
security-level 49
ip address 192.168.4.1 255.255.255.0
interface Ethernet0/2
shutdown
no nameif
no security-level
no ip address
interface Ethernet0/3
shutdown
no nameif
no security-level
no ip address
interface Management0/0
nameif management
security-level 100
ip address 192.168.1.1 255.255.255.0
management-only
boot system disk0:/asa844-9-k8.bin
ftp mode passive
clock timezone PST -8
clock summer-time PDT recurring
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
object network Inside-Native-Network-PNAT
subnet 10.1.1.0 255.255.255.0
description Root Inisde Native Interface Network with PNAT
object network ASA-Outside-IP
host 198.XX.XX.82
description The primary IP of the ASA
object network Inside-Native-Network
subnet 10.1.1.0 255.255.255.0
description Root Inisde Native Interface Network
object network VPN-POOL-PNAT
subnet 192.168.100.0 255.255.255.0
description VPN Pool NAT for Inside
object network DEV-PUP-1-Network
subnet 192.168.0.0 255.255.255.0
description DEV-PUP-1 Network
object network DEV-PUP-2-Network
subnet 192.168.2.0 255.255.255.0
description DEV-PUP-2 Network
object network MGMT-1-Network
subnet 192.168.180.0 255.255.255.0
description MGMT-1 Network
object network MGMT-2-Network
subnet 192.168.181.0 255.255.255.0
description MGMT-2 Network
object network SUNCOR-PUP-1-Network
subnet 192.168.3.0 255.255.255.0
description SUNCOR-PUP-1 Network
object network SUNCOR-PUP-2-Network
subnet 192.168.4.0 255.255.255.0
description SUNCOR-PUP-2 Network
object network DEV-PUB-1-Network-PNAT
subnet 192.168.0.0 255.255.255.0
description DEV-PUB-1-Network with PNAT
object network DEV-PUB-2-Network-PNAT
subnet 192.168.2.0 255.255.255.0
description DEV-PUB-2-Network with PNAT
object network MGMT-1-Network-PNAT
subnet 192.168.180.0 255.255.255.0
description MGMT-1-Network with PNAT
object network MGMT-2-Network-PNAT
subnet 192.168.181.0 255.255.255.0
description MGMT-2-Network with PNAT
object network SUNCOR-PUB-1-Network-PNAT
subnet 192.168.3.0 255.255.255.0
description SUNCOR-PUB-1-Network with PNAT
object network SUNCOR-PUB-2-Network-PNAT
subnet 192.168.4.0 255.255.255.0
description SUNCOR-PUB-2-Network with PNAT
object network DEV-APP-1-PUB
host 198.XX.XX.XX
description DEV-APP-2 Public Server IP
object network DEV-APP-2-SNAT
host 192.168.2.120
description DEV-APP-2 Server with SNAT
object network DEV-APP-2-PUB
host 198.XX.XX.XX
description DEV-APP-2 Public Server IP
object network DEV-SQL-1
host 192.168.0.110
description DEV-SQL-1 Inside Server IP
object network DEV-SQL-2
host 192.168.2.110
description DEV-SQL-2 Inside Server IP
object network SUCNOR-APP-1-PUB
host 198.XX.XX.XX
description SUNCOR-APP-1 Public Server IP
object network SUNCOR-APP-2-SNAT
host 192.168.4.120
description SUNCOR-APP-2 Server with SNAT
object network SUNCOR-APP-2-PUB
host 198.XX.XX.XX
description DEV-APP-2 Public Server IP
object network SUNCOR-SQL-1
host 192.168.3.110
description SUNCOR-SQL-1 Inside Server IP
object network SUNCOR-SQL-2
host 192.168.4.110
description SUNCOR-SQL-2 Inside Server IP
object network DEV-APP-1-SNAT
host 192.168.0.120
description DEV-APP-1 Network with SNAT
object network SUNCOR-APP-1-SNAT
host 192.168.3.120
description SUNCOR-APP-1 Network with SNAT
object network PDX-LAN
subnet 192.168.1.0 255.255.255.0
description PDX-LAN for S2S VPN
object network PDX-Sonicwall
host XX.XX.XX.XX
object network LOGI-NLB--SNAT
host 192.168.0.53
description Logi NLB with SNAT
object network LOGI-PUP-IP
host 198.XX.XX.87
description Public IP of LOGI server for NLB
object network LOGI-NLB-IP
host 192.168.0.53
description LOGI NLB IP
object network LOGI-PUP-SNAT-NLB
host 198.XX.XX.87
description LOGI Pup with SNAT to NLB
object-group network vpn-inside
description All inside accessible networks
object-group network VPN-Inside-Networks
description All Inside Nets for Remote VPN Access
network-object object Inside-Native-Network
network-object object DEV-PUP-1-Network
network-object object DEV-PUP-2-Network
network-object object MGMT-1-Network
network-object object MGMT-2-Network
network-object object SUNCOR-PUP-1-Network
network-object object SUNCOR-PUP-2-Network
access-list acl-vpnclinet extended permit ip object-group VPN-Inside-Networks any
access-list outside_access_out remark Block ping to out networks
access-list outside_access_out extended deny icmp any any inactive
access-list outside_access_out remark Allow all traffic from inside to outside networks
access-list outside_access_out extended permit ip any any
access-list outside_access extended permit ip any object LOGI-NLB--SNAT
access-list outside_access extended permit ip any object SUNCOR-APP-2-SNAT
access-list outside_access extended permit ip any object SUNCOR-APP-1-SNAT
access-list outside_access extended permit ip any object DEV-APP-2-SNAT
access-list outside_access extended permit ip any object DEV-APP-1-SNAT
access-list outside_cryptomap extended permit ip object-group VPN-Inside-Networks object PDX-LAN
pager lines 24
logging asdm informational
mtu outside 1500
mtu Port-1-GI-Inside-Native 1500
mtu MGMT-1 1500
mtu MGMT-2 1500
mtu DEV-PUB-1 1500
mtu DEV-PUB-2 1500
mtu SUNCOR-PUB-1 1500
mtu SUNCOR-PUB-2 1500
mtu management 1500
ip local pool Remote-VPN-Pool 192.168.100.1-192.168.100.20 mask 255.255.255.0
no failover
icmp unreachable rate-limit 1 burst-size 1
icmp permit any outside
icmp permit any Port-1-GI-Inside-Native
icmp permit any MGMT-1
icmp permit any MGMT-2
icmp permit any DEV-PUB-1
icmp permit any DEV-PUB-2
icmp permit any SUNCOR-PUB-1
icmp permit any SUNCOR-PUB-2
asdm image disk0:/asdm-649-103.bin
no asdm history enable
arp DEV-PUB-1 192.168.0.53 0100.5e7f.0035 alias
arp timeout 14400
no arp permit-nonconnected
nat (Port-1-GI-Inside-Native,outside) source static any any destination static VPN-POOL-PNAT VPN-POOL-PNAT
nat (DEV-PUB-1,outside) source static any any destination static VPN-POOL-PNAT VPN-POOL-PNAT
nat (DEV-PUB-2,outside) source static any any destination static VPN-POOL-PNAT VPN-POOL-PNAT
nat (MGMT-1,outside) source static any any destination static VPN-POOL-PNAT VPN-POOL-PNAT
nat (MGMT-2,outside) source static any any destination static VPN-POOL-PNAT VPN-POOL-PNAT
nat (SUNCOR-PUB-1,outside) source static any any destination static VPN-POOL-PNAT VPN-POOL-PNAT
nat (SUNCOR-PUB-2,outside) source static any any destination static VPN-POOL-PNAT VPN-POOL-PNAT
nat (DEV-PUB-1,outside) source static DEV-PUP-1-Network DEV-PUP-1-Network destination static PDX-LAN PDX-LAN no-proxy-arp route-lookup
nat (DEV-PUB-2,outside) source static DEV-PUP-2-Network DEV-PUP-2-Network destination static PDX-LAN PDX-LAN no-proxy-arp route-lookup
nat (MGMT-1,outside) source static MGMT-1-Network MGMT-1-Network destination static PDX-LAN PDX-LAN no-proxy-arp route-lookup
nat (MGMT-2,outside) source static MGMT-2-Network MGMT-2-Network destination static PDX-LAN PDX-LAN no-proxy-arp route-lookup
nat (Port-1-GI-Inside-Native,outside) source static Inside-Native-Network Inside-Native-Network destination static PDX-LAN PDX-LAN no-proxy-arp route-lookup
nat (SUNCOR-PUB-1,outside) source static SUNCOR-PUP-1-Network SUNCOR-PUP-1-Network destination static PDX-LAN PDX-LAN no-proxy-arp route-lookup
nat (SUNCOR-PUB-2,outside) source static SUNCOR-PUP-2-Network SUNCOR-PUP-2-Network destination static PDX-LAN PDX-LAN no-proxy-arp route-lookup
object network Inside-Native-Network-PNAT
nat (Port-1-GI-Inside-Native,outside) dynamic interface
object network VPN-POOL-PNAT
nat (Port-1-GI-Inside-Native,outside) dynamic interface
object network DEV-PUB-1-Network-PNAT
nat (DEV-PUB-1,outside) dynamic interface
object network DEV-PUB-2-Network-PNAT
nat (DEV-PUB-2,outside) dynamic interface
object network MGMT-1-Network-PNAT
nat (MGMT-1,outside) dynamic interface
object network MGMT-2-Network-PNAT
nat (MGMT-2,outside) dynamic interface
object network SUNCOR-PUB-1-Network-PNAT
nat (SUNCOR-PUB-1,outside) dynamic interface
object network SUNCOR-PUB-2-Network-PNAT
nat (SUNCOR-PUB-2,outside) dynamic interface
object network DEV-APP-2-SNAT
nat (DEV-PUB-2,outside) static DEV-APP-2-PUB
object network SUNCOR-APP-2-SNAT
nat (SUNCOR-PUB-2,outside) static SUNCOR-APP-2-PUB
object network DEV-APP-1-SNAT
nat (DEV-PUB-1,outside) static DEV-APP-1-PUB
object network SUNCOR-APP-1-SNAT
nat (SUNCOR-PUB-1,outside) static SUCNOR-APP-1-PUB
object network LOGI-NLB--SNAT
nat (DEV-PUB-1,outside) static LOGI-PUP-IP
object network LOGI-PUP-SNAT-NLB
nat (outside,DEV-PUB-1) static LOGI-NLB-IP
access-group outside_access in interface outside
access-group outside_access_out out interface outside
route outside 0.0.0.0 0.0.0.0 198.145.120.81 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
http server enable
http 192.168.1.0 255.255.255.0 management
http 192.168.1.0 255.255.255.0 outside
http 10.1.1.0 255.255.255.0 Port-1-GI-Inside-Native
http 192.168.180.0 255.255.255.0 MGMT-1
http 192.168.100.0 255.255.255.0 Port-1-GI-Inside-Native
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
class-map inspection_default
match default-inspection-traffic
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect ip-options
inspect icmp
inspect icmp error
service-policy global_policy global
prompt hostname context
call-home reporting anonymous
call-home
profile CiscoTAC-1
no active
destination address http https://tools.cisco.com/its/service/oddce/services/DDCEService
destination address email [email protected]
destination transport-method http
subscribe-to-alert-group diagnostic
subscribe-to-alert-group environment
subscribe-to-alert-group inventory periodic monthly
subscribe-to-alert-group configuration periodic monthly
subscribe-to-alert-group telemetry periodic daily
Cryptochecksum:d6f9f8e2113dc03cede9f2454dba029b
: end
Any help would be great! I think the issue is in teh NAT as I am able to access NLB IP from the outside and could not do that before adding the Static ARP stuff.
Thanks,
ChrisAlso If I change to NAT from the public IP to the NLB IP to use either one of the phsyical IPs of the NLB cluster (192.168.0.50 or 51) it works fine when using the public IP. So it's definatly an issue when NATing the VIP of NLB cluster.
Chris -
ASA NG 5515-X multicontext support for WSE/AVC and IPS
Hello,
I am designing network security with Cisco ASAs. I have a redundant core / distribution switching in VSS and 2 ASAs (Active / Standby) and trying to evaluate whether I could run multiple security services on one pair of ASA in virtual contexts rather then deploying more ASAs. I need to run DMZ so that it could go in one virtual context, then I need to run WSE, AVC and possibly IPS to protect internal users LANs and also deploy web and application security, here not sure if that is supported in a virtual context and with active/standby setup, apart from that I need to protect the servers with FW rules and IPS, here also a dilemma whether this will work in a virtual context and active / standby setup.
What would you recommend, having separate pair of ASAs for each security service or I could do all that with one pair of ASAs and multi context setup?
Thanks in advance for quick and informative responses.
RemiOK cool. What is the purpose of the explicit context awareness in PRSM? Is it there but still not supported?
The only concern I have is about DMZ on same ASA pair. I guess it should be fine because I would not sent any DMZ traffic to CX module (where it would get mixed up with users or servers traffic) and since DMZ would be on a separate virtual context the security would be maintained. Also the DMZ will be kept on a separate VRF and will need to do VRF leaking from DMZ inside VLAN into servers VLAN in the services VRF.
How about sending both users (for WSE and AVC) and servers (for IPS) traffic into the same CX module? That would work fine?
Thanks in advance,
Remi -
Routing issue with ASA and UC540 phone system - at ASA???
Having an issue with routing from the PC at .242 to the CUE server at 10.1.10.1. The CUE server is built into the UC540 phone system. It is an internal piece of software that is used for voicemail and management. The UC540 is not only a call router, it is also an IOS router. It has it's own WAN connection as does the ASA.
Here are some facts:
1. Can ping the UC540's internal CUE server from the PC ( ping to 10.1.10.1 )
2. Can ping the UC540's VLAN 1 address from the PC ( ping to 10.1.10.1 )
3. The ASA is the default gateway for the PC.
4. I have a route inserted at the asa that is:
route 10.1.10.1 255.255.255.0 10.19.250.254 1
5. I have a nat statement that prevents NAT from occuring but I don't think this is necessary as the 10.1.10.0/24 network isn't otherwise defined on the ASA.
6. I cannot pull up a web page when I point the browser on the PC to the 10.1.10.1 address
7. I CAN pull up a web page on the PC when I create a static route on the PC iteslf :
route add 10.1.10.1 mask 255.255.255.0 10.19.250.254
Is is only with this route that I am able to get to the web GUI on the phone system.
8. The phone system has a loopback interface at 10.1.10.2 that serves as the gateway for the internal CUE server, the internal CUE server is at 10.1.10.1
9. The switch is a 2960 and has a trunk port to the phone system to allow for the voice vlan which is at 10.1.1.0/24, no issues with this vlan and phones are connecting to the system fine.
Since I can get the GUI to come up when I set a static route on the PC, then I would assume that the routing in the phone system with it's internal server is fine as it wouldn't work otherwise. Since I can successfully ping the CUE server from the PC, that would lead me to believe that the ASA's routing is setup correctly..... TCP traffic doesn't seem to get to/from the CUE server.
Here are the routing tables:
ASA:
Gateway of last resort is xxx.xxx.xxx.xxx to network 0.0.0.0
C xxx.xxx.xxx.xxx 255.255.255.252 is directly connected, outside
S 172.16.100.100 255.255.255.255 [1/0] via 38.97.193.65, outside
S 10.1.10.0 255.255.255.252 [1/0] via 10.19.250.254, inside
C 10.19.250.0 255.255.254.0 is directly connected, inside
S* 0.0.0.0 0.0.0.0 [1/0] via xx.xx.xx.xx, outside
The UC540 phone system's router side:
Gateway of last resort is xx.xx.xx.xx to network 0.0.0.0
S* 0.0.0.0/0 [1/0] via xx.xx.xx.xx
10.0.0.0/8 is variably subnetted, 7 subnets, 4 masks
C 10.1.1.0/24 is directly connected, BVI100
L 10.1.1.1/32 is directly connected, BVI100
C 10.1.10.0/30 is directly connected, Loopback0
S 10.1.10.1/32 is directly connected, Integrated-Service-Engine0/0
L 10.1.10.2/32 is directly connected, Loopback0
C 10.19.250.0/23 is directly connected, BVI1
L 10.19.250.254/32 is directly connected, BVI1
XX.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C XX.XX.XX.XX/29 is directly connected, FastEthernet0/0
L XX.XX.XX.XX/32 is directly connected, FastEthernet0/0
172.16.0.0/24 is subnetted, 1 subnets
S 172.16.100.0 [1/0] via 10.19.250.1
The UC540's internal CUE server:
Main Routing Table:
DEST GATE MASK IFACE
10.1.10.0 0.0.0.0 255.255.255.252 eth0
0.0.0.0 10.1.10.2 0.0.0.0 eth0
Any help appreciated!!!
Thanks!Hello,
Where you able to solve this problem? It does sound like an issue with TCP state checking on the ASA. The Firewall needs to see both sides of the traffic but the return traffic is going from your UC540 direct to the PC. The firewall essentially kills the traffic.
I would recommend disabling TCP state checking on the ASA and see if it works. Otherwise, you will need to stub route the UC540 as a separate VLAN off the ASA which needs to route through the ASA to reach the PC.
Here is a info page on the TCP State Bypass:
http://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/111986-asa-tcp-bypass-00.html
Please let me know how it works out. -
iam providing cisco solution for a customer. I am proposing CSA for the servers and ASA with AIP as the perimeter defense.
What additional component do i need more to implement this. (ie. the management for ASA and ASA etc.)
thanksHello fajardo,
I would recommend you to order a basic product of VMS. The Cisco security Agent software is managed and controlled by the CSA MC on the VMS server. This will be the central point of contact for all the CSA agents... ASA can be managed normally through CLI or GUI , like the PIX firewall. But the events on the SSM server requires VMS or IDM for tracking the attacks.
Hope this helps... all the best.. rate replies if found useful...
Raj -
Hi,
don't know whether this is the right forum, but i will try to ask my question in hope that somebody can give me an answer:
I installed an ASA Security Appliance with WebVPN feature to connect to an internal Citrix Server farm. All authentication and authorization information are handled by a SecureACS, which is connected to ADS. All works fine. But now i want to Single-Sign-On to the citrix farm, means that the authentication information has to pass to citrix without entering the information twice...
Is there anybody out there who got this working?? SSO with basic authentication to an Apache webserver works just fine...
Which authentication informations are required for the Citrix Web Interface??
Thanx in advance!
BerndMy custpomer is using pure http between the citrix server and the citrix client, they want to access through the vpn concentrator using the webvpn feature, after checking the citrix metaframe option on the vpn concentrator, when they try to access the client hangs on and the error that we get is ssl should be installed on the citrix server, as we use ssl between the client and vpn concentrator, my question is could citrix be accessed via pure http between the citrix server and the client in this case how to fix this error, or are we obliged to use ssl even between the citrix server and the client.
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Site-to-site vpn with 2 asa and home router
I am trying to establish a site-to-site vpn between 2 ASAs and am able to get the tunnel to establish and can get connectivity from the remote end of the connection to the local side. However, traffic from the local side is not able to get to the remote end. We have 2 ASA 5505 establishing the tunnel, on the remote end there is a linksys home router forwarding all traffic to the ASA outside interface on a private subnet. Our layout is as follows.
Internal Network Local ASA ISP1 ISP2 Remote Router Remote ASA Remote Network
192.168.1.0/24 local-gateway/public ip public ip/192.168.0.1/24 192.168.0.10/10.10.10.254 10.10.10.0/24
10.10.10.0/24 (remote) -> 192.168.1.0/24 (local) works
192.168.1.0/24 (local) -> 10.10.10.0/24 (remote) does not work
Below are the configs of the local and remote asa. any help would be greatly appreaciated.
local-asa
interface Ethernet0/0
switchport access vlan 2
interface Ethernet0/1
interface Ethernet0/2
interface Ethernet0/3
interface Ethernet0/4
interface Ethernet0/5
interface Ethernet0/6
interface Ethernet0/7
interface Vlan1
nameif inside
security-level 100
ip address 192.168.1.6 255.255.255.0
interface Vlan2
nameif outside
security-level 0
ip address dhcp setroute
same-security-traffic permit inter-interface
object network obj_any
subnet 0.0.0.0 0.0.0.0
object network Switch
host 192.168.1.5
description 2960-24 Switch
object network NETWORK_OBJ_192.168.1.0_24
subnet 192.168.1.0 255.255.255.0
object network Mark_Public
host 76.98.2.63
description Mark Public
object network Mark
subnet 10.10.10.0 255.255.255.0
description Marks Network
object network Mark_routed_subnet
subnet 192.168.0.0 255.255.255.0
access-list outside_access_in extended permit icmp any4 any4 echo-reply
access-list outside_access_in extended permit tcp any object home-app-svr object-group DM_INLINE_TCP_2
access-list outside_access_in extended permit ip object Mark 192.168.1.0 255.255.255.0
access-list outside_cryptomap extended permit ip 192.168.1.0 255.255.255.0 object Mark
access-list Home standard permit 192.168.1.0 255.255.255.0
icmp unreachable rate-limit 1 burst-size 1
icmp deny any outside
asdm image disk0:/asdm-711.bin
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
nat (inside,outside) source static NETWORK_OBJ_192.168.1.0_24 NETWORK_OBJ_192.168.1.0_24 destination static Mark Mark no-proxy-arp
object network obj_any
nat (inside,outside) dynamic interface
access-group outside_access_in in interface outside
route outside 10.10.10.0 255.255.255.0 24.163.112.1 1
route outside 10.10.10.0 255.255.255.0 76.98.2.63 128
aaa-server Radius protocol radius
aaa-server Radius (inside) host 192.168.1.101
key *****
user-identity default-domain LOCAL
aaa authentication ssh console Radius LOCAL
aaa authentication telnet console Radius LOCAL
aaa authentication enable console Radius LOCAL
aaa authentication http console Radius LOCAL
aaa authentication serial console Radius LOCAL
aaa accounting enable console Radius
aaa accounting serial console Radius
aaa accounting ssh console Radius
aaa accounting telnet console Radius
http server enable
http 192.168.1.0 255.255.255.0 inside
http 66.162.9.0 255.255.255.0 outside
http 76.98.2.63 255.255.255.255 outside
http 10.10.10.0 255.255.255.0 inside
snmp-server host inside 192.168.1.101 community *****
snmp-server location 149 Cinder Cross
snmp-server contact Ted Stout
snmp-server community *****
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
snmp-server enable traps syslog
snmp-server enable traps ipsec start stop
snmp-server enable traps entity config-change
snmp-server enable traps memory-threshold
snmp-server enable traps interface-threshold
snmp-server enable traps cpu threshold rising
crypto ipsec ikev2 ipsec-proposal DES
protocol esp encryption des
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal 3DES
protocol esp encryption 3des
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal AES
protocol esp encryption aes
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal AES192
protocol esp encryption aes-192
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal AES256
protocol esp encryption aes-256
protocol esp integrity sha-1 md5
crypto ipsec security-association pmtu-aging infinite
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set ikev2 ipsec-proposal AES256 AES192 AES 3DES DES
crypto map outside_map0 1 match address outside_cryptomap
crypto map outside_map0 1 set peer 76.98.2.63
crypto map outside_map0 1 set ikev1 transform-set ESP-3DES-MD5 ESP-3DES-SHA
crypto map outside_map0 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map outside_map0 interface outside
crypto map inside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map inside_map interface inside
crypto ca trustpoint ASDM_TrustPoint0
enrollment self
subject-name CN=stout-fw
keypair vpn.stoutte.homeip.net
crl configure
crypto ca trustpoint ASDM_TrustPoint1
enrollment terminal
crl configure
crypto ca trustpoint Home--Server-CA
enrollment terminal
subject-name CN=stout-fw,O=home
keypair HOME-SERVER-CA
crl configure
crypto ca trustpoint HOME-SSL
enrollment terminal
fqdn stoutfw.homeip.net
subject-name CN=stoutfw,O=Home
keypair HOME-SSL
no validation-usage
crl configure
crypto ca trustpoint SelfSigned
enrollment self
fqdn stoutfw.homeip.net
subject-name CN=stout-fw
keypair SelfSigned
crl configure
crypto ca trustpoint ASDM_TrustPoint2
enrollment self
fqdn 192.168.1.6
subject-name CN=stout-fw
keypair SelfSigned
crl configure
crypto ca trustpool policy
crypto ikev2 enable outside client-services port 443
crypto ikev2 remote-access trustpoint ASDM_TrustPoint0
crypto ikev1 enable inside
crypto ikev1 enable outside
telnet 192.168.1.0 255.255.255.0 inside
telnet timeout 20
ssh 192.168.1.0 255.255.255.0 inside
ssh timeout 5
console timeout 0
management-access inside
threat-detection basic-threat
threat-detection statistics host
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ntp server 192.168.1.5 source inside prefer
ssl trust-point SelfSigned outside
ssl trust-point ASDM_TrustPoint2 inside
group-policy DfltGrpPolicy attributes
vpn-tunnel-protocol ikev1 l2tp-ipsec ssl-clientless
group-policy GroupPolicy1 internal
group-policy GroupPolicy1 attributes
vpn-tunnel-protocol ikev1
username stoutte password 0w8WOxYi69SDg3bs encrypted privilege 15
username stoutte attributes
webvpn
anyconnect keep-installer installed
anyconnect profiles value VPN_client_profile type user
tunnel-group 76.98.2.63 type ipsec-l2l
tunnel-group 76.98.2.63 general-attributes
default-group-policy GroupPolicy1
tunnel-group 76.98.2.63 ipsec-attributes
ikev1 pre-shared-key *****
tunnel-group VPN type remote-access
tunnel-group VPN general-attributes
authentication-server-group Radius LOCAL
default-group-policy GroupPolicy_VPN
dhcp-server link-selection 192.168.1.101
tunnel-group VPN webvpn-attributes
group-alias VPN enable
class-map inspection_default
match default-inspection-traffic
remote-asa
: Saved
ASA Version 9.1(1)
interface Ethernet0/0
switchport access vlan 2
interface Ethernet0/1
interface Ethernet0/2
interface Ethernet0/3
interface Ethernet0/4
interface Ethernet0/5
interface Ethernet0/6
interface Ethernet0/7
interface Vlan1
nameif inside
security-level 100
ip address 10.10.10.254 255.255.255.0
interface Vlan2
nameif outside
security-level 0
ip address 192.168.0.10 255.255.255.0
ftp mode passive
clock timezone EDT -5
clock summer-time EDT recurring
dns server-group DefaultDNS
domain-name netlab.com
object network obj_any
subnet 0.0.0.0 0.0.0.0
object network Ted
subnet 192.168.1.0 255.255.255.0
description Teds Network
object network Ted_Public
host 24.163.116.187
object network outside_private
subnet 192.168.0.0 255.255.255.0
object network NETWORK_OBJ_10.10.10.0_24
subnet 10.10.10.0 255.255.255.0
access-list outside_cryptomap extended permit ip 10.10.10.0 255.255.255.0 object Ted
access-list outside_access_in extended permit icmp any4 any4 echo-reply
access-list outside_access_in extended permit ip object Ted 10.10.10.0 255.255.255.0
access-list outside_access_in extended permit ip object Ted_Public any
pager lines 24
logging enable
logging buffered debugging
logging asdm informational
logging debug-trace
nat (inside,outside) source static NETWORK_OBJ_10.10.10.0_24 NETWORK_OBJ_10.10.10.0_24 destination static Ted Ted no-proxy-arp
object network obj_any
nat (inside,outside) dynamic interface
access-group outside_access_in in interface outside
route outside 0.0.0.0 0.0.0.0 192.168.0.1 1
route outside 192.168.1.0 255.255.255.0 192.168.0.1 1
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
http server enable
http 24.163.116.187 255.255.255.255 outside
http 192.168.0.0 255.255.255.0 outside
http 10.10.10.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
crypto map outside_map2 1 match address outside_cryptomap
crypto map outside_map2 1 set peer 24.163.116.187
crypto map outside_map2 1 set ikev1 transform-set ESP-3DES-MD5 ESP-3DES-SHA
crypto map outside_map2 interface outside
crypto ikev2 enable outside
crypto ikev2 enable inside
crypto ikev1 enable outside
crypto ikev1 enable inside
ssh 10.10.10.0 255.255.255.0 inside
ssh timeout 30
console timeout 0
dhcpd address 10.10.10.1-10.10.10.20 inside
dhcpd enable inside
group-policy GroupPolicy1 internal
group-policy GroupPolicy1 attributes
vpn-tunnel-protocol ikev1
username admin password 8Ec7AqG6iwxq6gQ2 encrypted privilege 15
tunnel-group 24.163.116.187 type ipsec-l2l
tunnel-group 24.163.116.187 general-attributes
default-group-policy GroupPolicy1
tunnel-group 24.163.116.187 ipsec-attributes
ikev1 pre-shared-key *****
class-map inspection_default
match default-inspection-traffic
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:2f4107de10e7171c3d951745c56b8d01
: end
no asdm history enableI am trying to establish a site-to-site vpn between 2 ASAs and am able to get the tunnel to establish and can get connectivity from the remote end of the connection to the local side. However, traffic from the local side is not able to get to the remote end. We have 2 ASA 5505 establishing the tunnel, on the remote end there is a linksys home router forwarding all traffic to the ASA outside interface on a private subnet. Our layout is as follows.
Internal Network Local ASA ISP1 ISP2 Remote Router Remote ASA Remote Network
192.168.1.0/24 local-gateway/public ip public ip/192.168.0.1/24 192.168.0.10/10.10.10.254 10.10.10.0/24
10.10.10.0/24 (remote) -> 192.168.1.0/24 (local) works
192.168.1.0/24 (local) -> 10.10.10.0/24 (remote) does not work
Below are the configs of the local and remote asa. any help would be greatly appreaciated.
local-asa
interface Ethernet0/0
switchport access vlan 2
interface Ethernet0/1
interface Ethernet0/2
interface Ethernet0/3
interface Ethernet0/4
interface Ethernet0/5
interface Ethernet0/6
interface Ethernet0/7
interface Vlan1
nameif inside
security-level 100
ip address 192.168.1.6 255.255.255.0
interface Vlan2
nameif outside
security-level 0
ip address dhcp setroute
same-security-traffic permit inter-interface
object network obj_any
subnet 0.0.0.0 0.0.0.0
object network Switch
host 192.168.1.5
description 2960-24 Switch
object network NETWORK_OBJ_192.168.1.0_24
subnet 192.168.1.0 255.255.255.0
object network Mark_Public
host 76.98.2.63
description Mark Public
object network Mark
subnet 10.10.10.0 255.255.255.0
description Marks Network
object network Mark_routed_subnet
subnet 192.168.0.0 255.255.255.0
access-list outside_access_in extended permit icmp any4 any4 echo-reply
access-list outside_access_in extended permit tcp any object home-app-svr object-group DM_INLINE_TCP_2
access-list outside_access_in extended permit ip object Mark 192.168.1.0 255.255.255.0
access-list outside_cryptomap extended permit ip 192.168.1.0 255.255.255.0 object Mark
access-list Home standard permit 192.168.1.0 255.255.255.0
icmp unreachable rate-limit 1 burst-size 1
icmp deny any outside
asdm image disk0:/asdm-711.bin
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
nat (inside,outside) source static NETWORK_OBJ_192.168.1.0_24 NETWORK_OBJ_192.168.1.0_24 destination static Mark Mark no-proxy-arp
object network obj_any
nat (inside,outside) dynamic interface
access-group outside_access_in in interface outside
route outside 10.10.10.0 255.255.255.0 24.163.112.1 1
route outside 10.10.10.0 255.255.255.0 76.98.2.63 128
aaa-server Radius protocol radius
aaa-server Radius (inside) host 192.168.1.101
key *****
user-identity default-domain LOCAL
aaa authentication ssh console Radius LOCAL
aaa authentication telnet console Radius LOCAL
aaa authentication enable console Radius LOCAL
aaa authentication http console Radius LOCAL
aaa authentication serial console Radius LOCAL
aaa accounting enable console Radius
aaa accounting serial console Radius
aaa accounting ssh console Radius
aaa accounting telnet console Radius
http server enable
http 192.168.1.0 255.255.255.0 inside
http 66.162.9.0 255.255.255.0 outside
http 76.98.2.63 255.255.255.255 outside
http 10.10.10.0 255.255.255.0 inside
snmp-server host inside 192.168.1.101 community *****
snmp-server location 149 Cinder Cross
snmp-server contact Ted Stout
snmp-server community *****
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
snmp-server enable traps syslog
snmp-server enable traps ipsec start stop
snmp-server enable traps entity config-change
snmp-server enable traps memory-threshold
snmp-server enable traps interface-threshold
snmp-server enable traps cpu threshold rising
crypto ipsec ikev2 ipsec-proposal DES
protocol esp encryption des
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal 3DES
protocol esp encryption 3des
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal AES
protocol esp encryption aes
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal AES192
protocol esp encryption aes-192
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal AES256
protocol esp encryption aes-256
protocol esp integrity sha-1 md5
crypto ipsec security-association pmtu-aging infinite
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set ikev2 ipsec-proposal AES256 AES192 AES 3DES DES
crypto map outside_map0 1 match address outside_cryptomap
crypto map outside_map0 1 set peer 76.98.2.63
crypto map outside_map0 1 set ikev1 transform-set ESP-3DES-MD5 ESP-3DES-SHA
crypto map outside_map0 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map outside_map0 interface outside
crypto map inside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map inside_map interface inside
crypto ca trustpoint ASDM_TrustPoint0
enrollment self
subject-name CN=stout-fw
keypair vpn.stoutte.homeip.net
crl configure
crypto ca trustpoint ASDM_TrustPoint1
enrollment terminal
crl configure
crypto ca trustpoint Home--Server-CA
enrollment terminal
subject-name CN=stout-fw,O=home
keypair HOME-SERVER-CA
crl configure
crypto ca trustpoint HOME-SSL
enrollment terminal
fqdn stoutfw.homeip.net
subject-name CN=stoutfw,O=Home
keypair HOME-SSL
no validation-usage
crl configure
crypto ca trustpoint SelfSigned
enrollment self
fqdn stoutfw.homeip.net
subject-name CN=stout-fw
keypair SelfSigned
crl configure
crypto ca trustpoint ASDM_TrustPoint2
enrollment self
fqdn 192.168.1.6
subject-name CN=stout-fw
keypair SelfSigned
crl configure
crypto ca trustpool policy
crypto ikev2 enable outside client-services port 443
crypto ikev2 remote-access trustpoint ASDM_TrustPoint0
crypto ikev1 enable inside
crypto ikev1 enable outside
telnet 192.168.1.0 255.255.255.0 inside
telnet timeout 20
ssh 192.168.1.0 255.255.255.0 inside
ssh timeout 5
console timeout 0
management-access inside
threat-detection basic-threat
threat-detection statistics host
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ntp server 192.168.1.5 source inside prefer
ssl trust-point SelfSigned outside
ssl trust-point ASDM_TrustPoint2 inside
group-policy DfltGrpPolicy attributes
vpn-tunnel-protocol ikev1 l2tp-ipsec ssl-clientless
group-policy GroupPolicy1 internal
group-policy GroupPolicy1 attributes
vpn-tunnel-protocol ikev1
username stoutte password 0w8WOxYi69SDg3bs encrypted privilege 15
username stoutte attributes
webvpn
anyconnect keep-installer installed
anyconnect profiles value VPN_client_profile type user
tunnel-group 76.98.2.63 type ipsec-l2l
tunnel-group 76.98.2.63 general-attributes
default-group-policy GroupPolicy1
tunnel-group 76.98.2.63 ipsec-attributes
ikev1 pre-shared-key *****
tunnel-group VPN type remote-access
tunnel-group VPN general-attributes
authentication-server-group Radius LOCAL
default-group-policy GroupPolicy_VPN
dhcp-server link-selection 192.168.1.101
tunnel-group VPN webvpn-attributes
group-alias VPN enable
class-map inspection_default
match default-inspection-traffic
remote-asa
: Saved
ASA Version 9.1(1)
interface Ethernet0/0
switchport access vlan 2
interface Ethernet0/1
interface Ethernet0/2
interface Ethernet0/3
interface Ethernet0/4
interface Ethernet0/5
interface Ethernet0/6
interface Ethernet0/7
interface Vlan1
nameif inside
security-level 100
ip address 10.10.10.254 255.255.255.0
interface Vlan2
nameif outside
security-level 0
ip address 192.168.0.10 255.255.255.0
ftp mode passive
clock timezone EDT -5
clock summer-time EDT recurring
dns server-group DefaultDNS
domain-name netlab.com
object network obj_any
subnet 0.0.0.0 0.0.0.0
object network Ted
subnet 192.168.1.0 255.255.255.0
description Teds Network
object network Ted_Public
host 24.163.116.187
object network outside_private
subnet 192.168.0.0 255.255.255.0
object network NETWORK_OBJ_10.10.10.0_24
subnet 10.10.10.0 255.255.255.0
access-list outside_cryptomap extended permit ip 10.10.10.0 255.255.255.0 object Ted
access-list outside_access_in extended permit icmp any4 any4 echo-reply
access-list outside_access_in extended permit ip object Ted 10.10.10.0 255.255.255.0
access-list outside_access_in extended permit ip object Ted_Public any
pager lines 24
logging enable
logging buffered debugging
logging asdm informational
logging debug-trace
nat (inside,outside) source static NETWORK_OBJ_10.10.10.0_24 NETWORK_OBJ_10.10.10.0_24 destination static Ted Ted no-proxy-arp
object network obj_any
nat (inside,outside) dynamic interface
access-group outside_access_in in interface outside
route outside 0.0.0.0 0.0.0.0 192.168.0.1 1
route outside 192.168.1.0 255.255.255.0 192.168.0.1 1
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
http server enable
http 24.163.116.187 255.255.255.255 outside
http 192.168.0.0 255.255.255.0 outside
http 10.10.10.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
crypto map outside_map2 1 match address outside_cryptomap
crypto map outside_map2 1 set peer 24.163.116.187
crypto map outside_map2 1 set ikev1 transform-set ESP-3DES-MD5 ESP-3DES-SHA
crypto map outside_map2 interface outside
crypto ikev2 enable outside
crypto ikev2 enable inside
crypto ikev1 enable outside
crypto ikev1 enable inside
ssh 10.10.10.0 255.255.255.0 inside
ssh timeout 30
console timeout 0
dhcpd address 10.10.10.1-10.10.10.20 inside
dhcpd enable inside
group-policy GroupPolicy1 internal
group-policy GroupPolicy1 attributes
vpn-tunnel-protocol ikev1
username admin password 8Ec7AqG6iwxq6gQ2 encrypted privilege 15
tunnel-group 24.163.116.187 type ipsec-l2l
tunnel-group 24.163.116.187 general-attributes
default-group-policy GroupPolicy1
tunnel-group 24.163.116.187 ipsec-attributes
ikev1 pre-shared-key *****
class-map inspection_default
match default-inspection-traffic
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:2f4107de10e7171c3d951745c56b8d01
: end
no asdm history enable -
How to determine the IPS throughput using Cisco ASA 5500 IPS Solution?
Hello there!
I´ve been desinging a solution to protect de Server Farm and I intend to use the ASA 5500 series with AIP-SSM module. There´s any tool to determine the real throughput that I need? I mean, how to determine the performance (Firewall + IPS throughput), what main points I should consinder?If the server farm is running production levels of traffic today you can get statistics off a variety of networking devices passing the existing traffic. Switches, routers and firewalls all count every byte of traffic they pass. There are plenty of tools that can gather this traffic into tables via SNMP too, such as MRTG.
Do not average your traffic over too great a time peroid, you will miss busy hour peaks. At most, use 5 min averages.
- Bob -
Best practices for using Normalizer in ASA and in AIP-SSM
Both PIX OS 7.x and IPS 5.x software have a concept of "traffic normalization". PIX OS on ASA can do virtual reassembly, IPS on SSM (so far as I know) can do physical reassembly and fragmentation of IP packets. Also, both ASA and SSM can do TCP normalization. For example, they both can "check inconsistent retransmissions" and protect against "TTL evasion attacks". I realize that PIX OS has only basic normalization functions and the SSM is much more configurable.
The question is: what are the best practices here? Is it better to disable some IP/TCP PIX OS checks / IPS signatures on ASA and/or SSM? Is it better to use just SSM for traffic normalization? Does anybody has personal experience here?
Also, there is a BugID CSCsd04327 - "ASA all out of order packets are dropped when sending to ssm"
"When ips ssm is inline slowness is reported. show service-policy shows that the number of out of order packets reported match exactly the number of no buffer drops (even with queue-limit option). Performance hit is not the result of tcp normalization (on IPS 5.x ssm) in this case, but rather an issue with asa normalizer."
To me it seems to be more logical to have normalization function on the firewall, but there may be drawbacks in doing this.
So, those who're using ASA with SSM, please share your experience.
Thx.Yes, this is almost correct ;)
TCP SRP (Stream Reassemly Processor) is turned OFF on the SSM and cannot be enabled, contrary to 4200 appliances, but IP FRP (Fragmentation Reassembly Processor) is functioning on the SSM.
The testing of 7.2(1) shows the following:
When you configure "policy-map" to send packets to the SSM the "tcp-map" parameter "queue-limit", which has the value of zero by default, is set to an X (the X is unknown). This means that the ASA now only accepts the TCP segments which are sent in the correct order. More specifically, the gaps in SEQs are not allowed anymore. When for example, the ASA receives a TCP segment which has a SEQ within the window, but the previous TCP segment has been lost, it sends an ACK to the sender to enforce retransmition of the lost segment. As a result the sender retransmits both segments. Only after that the ASA forwards both segments to the SSM. This basically means that SSM always sees in-order TCP segments. That it is why SRP is not needed on the SSM.
There are at least two problems however.
The first problem is the performance impact.
ASA now acts almost like a proxy. And, so far as I know, it doesn't support SACK (Selective ACKs). First, when the ASA does TCP SEQ randomization it doesn't change SEQ values within the SACK TCP Option. This simply breakes SACK. Second, even if you turn randomization mechanism OFF, then, I believe, the ASA will not selectively ACK the lost TCP segments, as it simply doesn't support this mechanism.
The second problem is THE SECURITY HOLE.
By default the ASA doesn't check TCP checksums. The 4200 appliances do check by default. But as we now know the SRP is turned OFF on the SSM... So, this means that SSM module can easily be evaded. The hacker only needs to mix attacking traffic with the random TCP segments that have bad TCP checksum. The SSM module will see the mixture of the two and will not recognize the attack. The target host will drop TCP segments with the bad checksums and see only attacking traffic... This has been successfully verified in the lab.
Of course, this security hole can be closed with the "tcp-map" parameter "checksum-verification", but it will definitely has performance impact.
The last note: All of the above has never been documented by Cisco. So, use at your own risk, etc.
I hope, you will read this message, Marcoa. All of this MUST be documented. Once again, the default behaviour of the ASA opens up a big security hole.
Regards,
Oleg Tipisov,
REDCENTER,
Moscow -
Hi Guys
Can integrate my Ciso IPS to the Cisco Prime 2.0 and How....
thanksNot in any meaningful way.
If you have a Cisco IPS appliance (or IPS module in an ASA), it can be managed either via IPS Device Manager (IDM), IPS Manager Express (IME) or Cisco Security Manager (CSM).
Newer ASA CX modules with IPS service are managed via PRSM.
Of course Cisco Sourcefire IPS sensors are managed via Defense Center. -
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Regards,
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