IPS in Transparent Mode

Hi,
I need to know if the 5512X IPS will work if the ASA is in transparent mode and/or any limitations.
Thanks.

Hello,
Yes, it can definetly run on transparent mode
An ASA in transparent mode can run an AIP. In the event the AIP fails,
the IPS will fail-open and the ASA will continue to pass traffic.
However, if an interface or cable fails, then traffic will stop. You
would need a failover pair to account for this failure event, which
means another ASA and matching AIP."
Regards,
Julio

Similar Messages

Firewall Transparent Mode with IPS

Dear All,
I have network setup shown below
Router --- Firewall Transparent Mode --- cisco layer 3 switch
I am planning to implement ips. Which is the right place to put the IPS
IPS is separate hardware. Let me know on which mode IPS has to be enabled? Rgds - pramod

Hello,
If you have the separate hardware of IPS then, place the IPS in between Router and firewall.
you can use the IPS in inline and promiscuous mode.
In inline mode all traffic will pass through the IPS first then after inspection will move to firewall.
And if you are using the IPS in promiscuous mode then the copy of traffic will send to the IPS and after that inspection will done.
Thanks.

Explain about transparent mode, single mode, multiple context mode

You can explain about the differents of transparent mode, single mode, multiple context mode in ASA 5500? Thank you very much.

Great question. Hope the below helps:
Transparent Mode: In this mode, the ASA will filter traffic without requiring L3 on the ASA. This means that in your config you will not put IPs on the interfaces to be used for traffic filtering. Thus, filtering is transparent to the traffic as the traffic isn't directly routed to the firewall. Think of it like you have a server plugged into a switch. In transparent mode, you place the ASA between the server and the switch and no configuration change is required to the server. In routed mode, you place the ASA in the same physical location between the server and switch, but have to change the server to use the ASA as a default gateway.
Single Mode: Default mode of an ASA. The ASA acts as a single firewall and all interfaces are provisioned to be managed through a single firewall configuration.
Multiple Context Mode: The ASA is split into multiple virtual configurations. With the ASA now virtualized, you provision the physical interfaces on the ASA to the virtual firewall configured. Each context has it's own configuration seperate from the rest of the firewall. Multi-context is meant for enterprises to invest in a single piece of hardware and scale it for use as multiple security devices.
Hope this helps. Let me know if you have anymore questions!
-Mike
http://cs-mars.blogspot.com

VRF issue with Firewall in transparent Mode.

Hi Guys,
I have 7609 Router and 6513 L3 Switch connected Through ASA 5545.
I am running Multiple VRF between router and Switch and BGP routing Protocol. When they are connected directly to each other everything is normal, however, when I have connected them via ASA 5545 then everything fails. I am using ASA in transparent Mode.
My question is: Do ASA require different setting in case of VRF? If yes, then please give me sample config.

I have taken following output from Firewall will this be any help?
sh interface ouTSIDE
Interface GigabitEthernet0/1 "OUTSIDE", is up, line protocol is up
Hardware is i82574L rev00, BW 1000 Mbps, DLY 10 usec
        Auto-Duplex(Full-duplex), Auto-Speed(1000 Mbps)
        Input flow control is unsupported, output flow control is off
        MAC address 7c69.f68f.df78, MTU 1500
        IP address 175.4.8.35, subnet mask 255.255.255.248
        8435 packets input, 680680 bytes, 0 no buffer
        Received 8135 broadcasts, 0 runts, 0 giants
        0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
        0 pause input, 0 resume input
        8138 L2 decode drops
        0 packets output, 0 bytes, 0 underruns
        0 pause output, 0 resume output
        0 output errors, 0 collisions, 1 interface resets
        0 late collisions, 0 deferred
        0 input reset drops, 0 output reset drops
        input queue (blocks free curr/low): hardware (476/461)
        output queue (blocks free curr/low): hardware (511/511)
Traffic Statistics for "OUTSIDE":
        297 packets input, 118503 bytes
        0 packets output, 0 bytes
        297 packets dropped
      1 minute input rate 0 pkts/sec, 13 bytes/sec
      1 minute output rate 0 pkts/sec, 0 bytes/sec
      1 minute drop rate, 0 pkts/sec
      5 minute input rate 0 pkts/sec, 6 bytes/sec
      5 minute output rate 0 pkts/sec, 0 bytes/sec
      5 minute drop rate, 0 pkts/sec
ciscoasa# show asp drop
Frame drop:
FP L2 rule drop (l2_acl)                                                   297
ASA Version 9.0(1)
firewall transparent
ciscoasa# show module all
Mod Card Type                                    Model              Serial No.
0 ASA 5545-X with SW, 8 GE Data, 1 GE Mgmt     ASA5545
ips ASA 5545-X IPS Security Services Processor   ASA5545-IPS
Mod MAC Address Range                 Hw Version   Fw Version   Sw Version
0 7c69.f68f.df77 to 7c69.f68f.df80 1.0          2.1(9)8      9.0(1)
ips 7c69.f68f.df75 to 7c69.f68f.df75 N/A          N/A          7.1(4)E4
Mod SSM Application Name           Status           SSM Application Version
ips IPS                            Up               7.1(4)E4
Mod Status             Data Plane Status     Compatibility
0 Up Sys             Not Applicable
ips Up                 Up
Mod License Name   License Status Time Remaining
ips IPS Module     Enabled         perpetual
ciscoasa#
I have create Ehtertype ACL and permit any traffic.
cdp traffic has passed through but I am still not able to ping :(

ASA transparent mode with secondary IP on the router

Hi
I have
Router --- ASA (Transparent)----Switch
and just wonder if it is possible to configure secondary IP on the router interface which is connected to ASA
so there is plenty of room in terms of LAN IP range.
Or to implement this, do I have change ASA to context mode and modify configuration on the ASA?
hope I do not have to change anything on the ASA.
Thanks

ASA in transparant mode work as L2 device
so what ever ips u use dosent matter
u dont need to change anything in the ASA while it is in transperant mod
but be careful of what is allowed to be passed through the firewall
u can control it by ACLs
the router and the switch u have will operat in L3 as thy connected directly or nothing between them from routing and layer three prespective
so they shoud be in the same subnet VLAN and so on
good lcuk
please, if helpful rate

Transparent mode with AIP-SSM-20

I currently have an ASA5510 in routed mode with an AIP-SSM-20.
There is a requirement to use a fibre optic connection between this ASA and another ASA across campus, so the AIP-SSM will have to be removed and replaced with the SSM-4GE. This part should present no issue.
However, this will remove the IPS device, and I still want to use IPS.
So, what I am thinking is to get another ASA5510, install the AIP-SSM, configure ASA for transparent mode and put it in between the inside of the routed ASA and my LAN. The transparent ASA would be functioning strictly as an IPS appliance.
Setup would look something like this:
Internal LAN <> transparent ASA with IPS <> routed ASA <> WAN
Can the AIP-SSM still perform IPS with the ASA in transparent mode?
Is there a way to configure the ASA and AIP-SSM such that traffic to/from a particular server completely bypasses the AIP-SSM?
I have a couple of fileservers that generate heavy traffic and could overload the AIP-SSM.
Regards.

AFAIR, There is no problem to setup AIP in a transparent firewall.
"An ASA in transparent mode can run an AIP. In the event the AIP fails,
the IPS will fail-open and the ASA will continue to pass traffic.
However, if an interface or cable fails, then traffic will stop. You
would need a failover pair to account for this failure event, which
means another ASA and matching AIP."
And no there is no problem to exclude certain hosts/ports/subnets from inspection by IPS via MPF.
http://www.cisco.com/en/US/docs/security/asa/asa82/configuration/guide/ips.html#wp1050744
What I however consider however is if the ASAs 5510 as second tier firewall for 5520s will be enough.
http://www.cisco.com/en/US/products/ps6120/prod_models_comparison.html
HTH,
Marcin

Transparent Mode Guide

hi,
anyone here already has a summarized procedure on how to configure Ironport on Transparent Mode?
I assume that all existing proxies are supported by ironport if im going to have the WSA in transparent mode
Please post. if you already have one..
thank you

Hi Jon,
Thanks for the reply.
I have read two documents, one was 180 pages and the other one was over 400. I am not able to understand how to get the 6509 to communicate with the FWSM.
This is my Scenario:
I have to issue the "session slot 3 processor 1" command in order to get to the FWSM.
When there, i can see the following:
Version: Device Manager Version 5.2(4)F
Firewall Status:
FWSM# sho fire
Context Mode
admin Transparent
FWSM#
This is what I'm trying to do:
I have A client is renting a server and he is expecting some DDoS and so forth, i want to put him behind the FWSM.
He is right now sitting on vlan 473. This is a L3 Switch, so vlan 473 exists on L2 and obviously an SVI (interface vlan) with the following configuration:
Router.(config-if)#do svlan 473
Building configuration...
Current configuration : 201 bytes
interface Vlan473
description 04001021613.PRIVATELAYER.CH
ip address 31.7.61.177 255.255.255.240
ip access-group SPAM out
no ip redirects
no ip proxy-arp
ipv6 address 2A02:29B8:2118::1/48
end
Router.(config-if)#
I am aware that in routed mode you have to add the same vlans to the FWSM and so forth, but in transparent mode, honestly i am clueless.
Its stated that i have to use TWO interfaces and configure the same IPs on each (...) in routed mode i know its not possible, but in transparent mode it is somehow.
NOTE: I am only a CCNA but have done a LOT of research on the topic, I have not found a step-by-step guide not even in the CCNP or CCIE training videos out there. (i have over 40GB of Cisco videos...getting frustrated)
Any help is appreciated.
Thanks,
Ezequiel

ASA 5510 in Transparent Mode-Guidelines.

Dear all,
I need to convert routed mode to transparent mode on my ASA-5510 with inbuilt IPS.
let me know which of the following features configured on my firewall will have issue if converted to transparent mode:
1. static routes.
2. object-groups.
3. ACLS.
4. URL-filter (Websense).
5. IPS . ( i doubt this )
6. have 3 data and 1 Mgmt interfaces.
7. syslog.
8. SNMP
I'm sure point 5 and 6 will have issues, need to confirm.
need to confirm this by EOD,
( 5 hours more).
thanks in advance.
Shukla.

Does not participate in routing protocols but can still pass routing protocol traffic through it. You can define static routes for the traffic originated by the ASA.
in transparante mode the devices dehind and infront of the firewall will be in the same ip subnet as the firewall will be a L2 device!!
ACLs can be configured normally
syslog as well
obgect groups as well
Address translation is inherent when a firewall is configured for routed mode. Beginning with
ASA 8.0, address translation can be used in transparent mode as well
Does not participate in multicast. However, it allows passing the multicast traffic through it using the ACLs.
Does not support QoS.
Inspects Layer 2 and higher packet headers
as long as u can use
policy-map global_policy
then u can integrate with IPS if u mean AIP-ssm modul
transparent also known as a Layer 2 firewall or a stealth firewall, because its
interfaces have no IP addresses and cannot be detected or manipulated. Only a single
management address can be configured on the firewall
In transparent mode, a firewall can support only two interfaces-the inside and the outside. If
your firewall supports more than two interfaces from a physical and licensing standpoint, you
can assign the inside and outside to two interfaces arbitrarily. As soon as those interfaces are
configured, the firewall does not permit a third interface to be configured.
Some platforms also support a dedicated management interface, which can be used for all
firewall management traffic. However, the management interface cannot be involved in
accepting or inspecting user traffic
Configure a management address:
Firewall(config)# ip address ip_address subnet_mask
The firewall can support only a single IP address for management purposes. The address is
not bound to an interface, as in routed mode. Rather, it is assigned to the firewall itself,
accessible from either of the bridged interfaces.
The management address is used for all types of firewall management traffic, such as Telnet,
SSH, HTTP, SNMP, Syslog, TFTP, FTP, and so on.
A transparent firewall can also support multiple security contexts. In that case, interface IP
addresses must be configured from the respective context. The system execution space uses
the admin context interfaces and IP addresses for its management traffic
You do not have to configure a static route for the subnet directly connected to the firewall
interfaces. However, you should define one static route as a default route toward the outside
public network
i wish i covered all ur questions
good luck
if helpful Rate

The difference between VTP server and transparent mode on Catalyst Switch.

Hello
I have a question about the difference between VTP server mode and VTP transparent mode on general catalyst switch.
Basically VTP server mode can create and modify VLAN configuration but actually there is not any VLAN configuration through running-config, is it true? When I checked it on Cat3550, certainly there is not VLAN configuration on VTP server mode. But VTP transparent can create VLAN and configuration but does not synchronize with other switch VLAN status. I appreciate any related information and reason of the VTP server mode specification, thank you very much.
[VTP Transparent mode]
3550#sh vtp status
VTP Version : 2
Configuration Revision : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs : 27
VTP Operating Mode : Transparent
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
*omit
3550#
3550#sh run
Building configuration...
*omit
vlan 99
name TEST-VLAN
[VTP Server mode]
3550#sh vtp status
VTP Version : 2
Configuration Revision : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs : 27
VTP Operating Mode : Server
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
*omit
3550#
3550#sh run
Building configuration...
*no VLAN like above configuration on VTP transparent mode.
Best Regards,
Masanobu Hiyoshi

Hi mhiyoshi,
3550#sh vtp status
VTP Version : 2
Configuration Revision : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs : 27
VTP Operating Mode : Transparent
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
*omit
3550#
3550#sh run
Building configuration...
*omit
vlan 99
name TEST-VLAN
The above out put indicates that Vlan is created and then mode changed to transparent. i.e why revision no is 0.
3550#sh vtp status
VTP Version : 2
Configuration Revision : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs : 27
VTP Operating Mode : Server
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
*omit
3550#
3550#sh run
Building configuration...
*no VLAN like above configuration on VTP transparent mode.
This indicates that vlan never created in server mode nor learnt from another switch as revision no is 0

Cisco ASA 5512 Transparent mode

Hi all - hope this is the right place to ask this question-
I'm having trouble understanding how to configure an ASA 5512X in what should be a really easy way -
I simply want the ASA to be a transparent Layer 2 "bump" in a routed link between two networks, and then I'll use the Management interface to actually see the firewall ASDM,Syslog, configure, etc.
I have the interfaces set up thusly:
interface GigabitEthernet0/0
nameif UnTrustedNetwork
security-level 0
interface GigabitEthernet0/1
nameif TrustedNetwork
security-level 100
interface Management0/0
nameif ManagementAccess
security-level 100
ip address 192.168.X.Y 255.255.255.0
management-only
I cannot figure out how to install a default route so that interface Management0/0 with it's IP of 192.168.X.Y can be reached from
other networks, like 10.6.X.Y, etc.
I thought the point of a Management interface was that you could set things up in such a way that the Management interface
was the only way you could access the firewall, and you did not have to have IP addresses on the Gig interfaces,
(at least not in transparent mode, for NAT you obviously would have to)
I tried to add a static route entry to 10.6.X.Y , but
when I typed "route.." my only available destination interfaces were either TrustedNetwork or UnTrustedNetwork ??
How do I configure the Management interface for non-local subnets to be reachable on the firewall in transparent mode?

transparent firewall is configured differently from routed mode.
here's a basic config required:
firewall transparent (erases the current config; does not require a reboot)
interface BVI1
ip address 192.168.10.10 255.255.255.0
interface GigabitEthernet0
nameif outside
bridge-group 1
security-level 0
interface GigabitEthernet1
nameif inside
bridge-group 1
security-level 100
route outside 0.0.0.0 0.0.0.0 192.168.10.254
route inside 10.0.0.0 255.0.0.0 192.168.10.100
I think that you need a BVI interface with an IP address before the ASA starts forwarding traffic
The old syntax (pre 8.3 or 8.2 not sure) forces only 2 interfaces and no BVI was configured... the IP was assigned in global config.
Hope that helps,
Patrick

ASA Transparent mode multicast traffic in 8.2 and 8.4

Hi,
When i configure 8.2 in trasparent mode and deploy the a network that was wrok on EIGRP after that i found the neighborship was stop when i allow the mutlicast address and prtocol on outside interface it was start the working But when i deploy an ASA with 8.4 IOS and then allow the multicast address and protocol both the interface (Inside and outside) after that it was start working.
So i want to know that what the reasion to allow multicast address and protocol on 8.4 IOS for both interface. I am not able to find any answer for this.

Hi Mahesh,
By default ASA in transparent mode do not allow any packets not having a valid EtherType greater than or equal to 0x600. As per my knowledge this concept remain same for all versions of ASA. Most control plane protocols are denied.
ASA in transparent mode only allows ARP, broadcast traffic, TCP and UDP inspected unicast traffic.
For EIGRP to work through transparent firewall, we need to open ACLs in both direction for multicast and unicast both type of EIGRP traffic on all versions of ASA Firewall.

Trying to figure out whether I can use an ASA cluster in Transparent mode to facilitate VRF based network ??

Hi Guys,
I had to re-post this here because I did not get any comments earlier.. hopefully I'll get something here.. :)
I'm investigating the ways that I can use 2 x ASA (5525x) to accommodate Multi-tenancy situation with overlapping addresses. Unfortunately in this particular scenario we have to stick with 5525x firewalls.
The ASAs are going to be placed in north-south traffic path between 2 routers and these routers need to be configured with multiple VRFs to segregate the traffic for each tenant with overlapping IP subnets ( We are not looking at NAT as a workaround for the time being).
As we know, this ASA model won't support VRFs so we can't use the ASA as a intermediary routing hop and therefore this is not an option.. and using security contexts per VRF seems not scale-able enough (correct me if I'm wrong). So my thinking is that, if we put the ASAs in to the transparent mode and just use the ASAs as a layer 2 interconnect (configured with different VLANs connecting VRFs served by top and bottom routers) I should be able to go up to maximum of 50 VRFs (since 5525x only supports 200 VLANs).
I'm also planning to use the 2 ASAs in a cluster mode to aggregate the bandwidth of both ASAs for better throughput.
So I need to clarify following with you guys..
1) Can I actually do this or am I missing something.
2) Are there any limitations that I might run in to with this setup
3) Is there anyone out there who's doing the same thing or can you think of a better way to tackle this scenario (with same hardware and requirements)
4) Instead of using clustering, can I use simple Active/Stanby pare and still configure transparent mode and use it that way ?
Appreciate your input.
Thanks
Shamal

There is a limitation on how many context you can have, which depends on the license you have. This is quite possible with ASA multi routed mode and even with multi transparent mode. You can have overlapping ip in each context without the need of using nat as long as you have unique mac address for each sub interface.
Thanks

INPUT textfield does not show non-English letters with transparent mode

INPUT textfield does not show non-English letters when i
type, if transparent mode turn on
this is bug of Flash Player 9?
will this bug had be fixed?

I just tested Firefox and Chrome on linux, i doesn't work either, but i get different weird chars: Ã©Ã¨Ã§a
However, on both mac and linux, if i copy the chars and paste them in the input field, it passes.

I do have Apple Cinema 23" transparent mod. M8536 but I have to clue how to connect it to PC or current versions of MAC

I do have Apple Cinema 23" transparent mod. M8536 but I have to clue how to connect it to PC or current versions of MAC

You will need a DVI to ADC adapter
<http://www.amazon.com/Apple-DVI-ADC-Display-Adapter/dp/B00011KHT2>
If the computer does not have DVI, you will also need another adapter to connect the DVI plug to the computer.

IPS configuration promiscus mode(fail-open) assistance/troubleshooting

Hi all ,
I have 2 ASA configured in active/standby failover mode. I want to configure IPS in promiscus mode with fail-open configuration.
i have not connected IPS with any pc through magmt port.
I can access IPS through ASA(5520) using session 1 and able to do basic configuration using setup.
after configuring when i try to login through ASA ASDM(IPS tab on home page of ASA ASDM) it ask for ip(managment or other ip).. I am trying to access the IPS with ip(192.168.3.74) configured in IPS using initial setup (192.168.3.74/27, 192.168.3.65) and also added access-list allowing 192.168.3.0/24.
ASA inside ip subnet:192.168.3.64/27
ASA DMZ ip subnet: 192.168.1.0/24
let me know if i need to assign IPS ip from dmz range or inside range?
Do i need to setup same IP for IPS in both ASA module?
Let me know if i can connect to IPS from ASA ASDM using some ip(192.168.3.74) configured through setup on 443 port.?
What access-list i should add in IPS or ASA if required?
While setting up IPS 1st time using setup command i am not able to see the unused/monitored interface(g0/1) so that i could add both interface, which should show as per cisco doc. what may be the reason?
IPS 6.0
ASA(5520) 7.24
ASDM 5.24
Regards
Amardeep

You need to configure the interface properly and plug it in the network.
The second interface is displayed different in the AIP-SSM, as this is a logal/internal connection to the ASA.
Regards
Farrukh

IPS in Transparent Mode

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