NAT and Servers behind CSS 11501

All,
Please forgive my asking this question again. I was injured shortly after asking the last time and out of work for a long period of time.
My problem stems from needing to allow my web servers to initiate traffic to the outside world from behind our CSS boxes.
The web servers sit behind a pair of CSS 11501 content switches in Active-Passive ASR with fate sharing. We are only interested at this time with load balancing HTTP and HTTPS.
Everything works inbound no problem.
What I need to do is setup some type of NAT for my 3 web servers to initiate HTTP/HTTPS for patches, send SMTP from the web apps, and initiate HTTPS for credit card validation.
I have setup NAT on PIX units and routers no problem, but I seem to be unable to do it on these boxes. :(
In reality something as simple as a PAT translation on the outside of the CSS boxes should be sufficient.
Is this possible with our setup? Does anyone have some code examples?
Thanks in advance.
Addresses changed to protect the innocent:
Load Balancer 1:
!*************************** GLOBAL ***************************
bridge spanning-tree disabled
sntp server 1.1.1.41 version 1
snmp community noway read-only
snmp community noway read-write
app session 1.1.1.252
app
logging subsystem netman level info-6
dns primary 2.2.2.41
dns secondary 2.2.2.42
ip route 0.0.0.0 0.0.0.0 1.1.1.1 1
!************************* INTERFACE *************************
interface e1
phy 100Mbits-FD
description "Connect to Primary DMZ 1 3550 Switch"
interface e2
bridge vlan 2
phy 100Mbits-FD
description "Connected to Primary LB Server Switch"
interface e8
description "Inter Switch Communication (ISC) Port"
isc-port-one
!************************** CIRCUIT **************************
circuit VLAN1
description "DMZ 1 Subnet (1.1.1.x/24)"
ip address 1.1.1.251 255.255.255.0
ip virtual-router 1 priority 254 preempt
ip redundant-interface 1 1.1.1.250
ip redundant-vip 1 1.1.1.161
ip redundant-vip 1 1.1.1.162
ip redundant-vip 1 1.1.1.70
ip redundant-vip 1 1.1.1.71
ip redundant-vip 1 1.1.1.72
ip critical-service 1 upstream_downstream
circuit VLAN2
description "Load Balanced Servers Subnet"
ip address 2.2.2.2 255.255.255.0
ip virtual-router 2 priority 254 preempt
ip redundant-interface 2 2.2.2.1
ip critical-service 2 upstream_downstream
Various Services, Owners and Content
Load Balancer 2:
!*************************** GLOBAL ***************************
bridge spanning-tree disabled
sntp server 1.1.1.41 version 1
snmp community noway read-only
snmp community noway read-write
app session 1.1.1.251
app
logging subsystem netman level info-6
dns primary 2.2.2.41
dns secondary 2.2.2.42
ip route 0.0.0.0 0.0.0.0 1.1.1.1 1
!************************* INTERFACE *************************
interface e1
phy 100Mbits-FD
description "Connect to Secondary DMZ 1 3550 Switch"
interface e2
bridge vlan 2
phy 100Mbits-FD
description "Connected to Secondary LB Server Switch"
interface e8
description "Inter Switch Communication (ISC) Port"
isc-port-one
!************************** CIRCUIT **************************
circuit VLAN1
description "DMZ 1 Subnet (1.1.1.x/24)"
ip address 1.1.1.252 255.255.255.0
ip virtual-router 1
ip redundant-interface 1 1.1.1.250
ip redundant-vip 1 1.1.1.161
ip redundant-vip 1 1.1.1.162
ip redundant-vip 1 1.1.1.70
ip redundant-vip 1 1.1.1.71
ip redundant-vip 1 1.1.1.72
ip critical-service 1 upstream_downstream
circuit VLAN2
description "Load Balanced Servers Subnet"
ip address 2.2.2.3 255.255.255.0
ip virtual-router 2
ip redundant-interface 2 2.2.2.1
ip critical-service 2 upstream_downstream
Various Services, Owners and Content.

Gilles,
I added the following commands, and things seem to be working.
To circuit VLAN1
ip redundant-vip 1 1.1.1.80
!*************************** GROUP ***************************
group natout
vip address 1.1.1.80
add service nat_web_servers
active
service nat_web_servers
ip address 192.168.1.10 range 3
active
I do have a question about the above service commands.
I have 3 servers behind the CSS. Let's call them 192.168.1.10, 192.168.1.11 and 192.168.1.12. Am I correct in my thinking that adding range 3 then allows a match on all 3 of those servers and the CSS will then PAT these servers from the VIP address assigned to the group?
Otherwise, I think you have resolved this problem for us. Thank you.

Similar Messages

Servers behind CSS Browse the Internet

Can anyone show me how to configure on CSS for servers behind CSS 11000 browse the Internet ? I am using NAT.
thanks in advance
Andy

if you need the CSS to nat the servers ip addresses when they go out to the Internet, all you need is a group.
ie:
service server1
ip 10.x.x.x
active
servoce server2
ip 10.x.x.x
active
group natservers
vip address x.x.x.x
add service server1
add service server2
active
If you already had a group using these services, you will need something a little more tricky.
Just start with the above and let us know if it works.
Gilles.

Active/passive servers behind CSS

Hi,
I have 2 servers behind CSS, instead of doing load lancing , we need to work both servers as active/passive mode, mean if active server down then only second sever will serve.We can not move servers from behind css.
Please advice if this can be possible.
Regards,

you will need to use the "sorry server" feature in CSS to acheive that
Sample Config
!********* SERVICE *****************
service serverA
ip address x.x.x.1
active
service serverB
ip address x.x.x.2
active
!********** OWNER ****************
owner SYED
content EXAMPLE
vip address 1.1.1.1
port 80
protocol tcp
add service serverA
primarySorryServer ServerB
active
HTH
Syed Iftekhar Ahmed

Balancing From Behind CSS

I have a basic two int configuration CSS with web servers and email behind CSS both of which should be load balanced. So say on the outside there's a VIP smtp and another web. And inside there are servers/services web1 10.10.105, web2 10.10.10.106, mail1 10.10.10.107, mail2 10.10.10.108 and outside content rule
smtp 172.22.1.10 with mail1 and mail2 associated and content rule web 172.22.1.11 with web1 and web2 associated.
Now if mail2 wants to make an http post to web whose vip is on the outside interface - is this possible?

Yes, smtp servers behind the CSS can make request for HTTP servers thru the VIP and viceversa.
You need to consider that since all servers are on the same subnet, the destination server (HTTP server on this case) will not answer thru the CSS but directly to the source server (or HTTP client for this flow) which would cause an asymmetric flow issue.
So you need to have the CSS doing source NATing with the use of a Group and the command "add destination server".
Hope it helps!!
Diego M

Load balancing PPTP (Windows 2003) behind CSS 11500

I am wondering if you can load balance PPTP service (TCP port 1723 and GRE) behind CSS 11500, please let me know if anyone as experience with this setup.
Irfan
[email protected]

No. I dont think you can load balance PPTP service behind CSS 11500.

CSS 11501 and SSL

Hi,
I have a few questions regarding the CSS and SSL certificates.
I have 2 CSS 11501 and 3 web servers, how many SSL certificates do I need?
I want to configure the CSS as active - active, is this supported using the SSL accelleration module? If it is, is it configured the same way as a standalone CSS. The documentation only mentions configurations using single module and 2 modules in the same CSS.
And a clarificacion: Does the term Backend in the CSS SSL config refer to servers on a different subnet (in our case physically separated). Our config is 2 FW -> 2 CSS -> 3 Web servers -> 2 backend FW -> 6 Backend servers (app and DB). Am I correct in assuming that Backend refer to this backend? (This might seem like a silly question but the documentation has me confused)
Any help is much appreciated.
Thanks,
Niels

Niels,
there is currently an ASK THE EXPERT event.
Please join us if you have more questions.
Regarding the certificate, you could just use one.
Get 1 certificate for your VIP and upload it on both SSL module.
However, you might have to get 2, because certificate providers usually say it's one per physical device.
If you plan on doing SSL on the servers as well, you need 3 more certificates. Or you coul use a single certificate if this is allowed by the company that will give it to you.
Backend refers to server behind the CSS.
Like a firewall defines inside and outside interfaces, the CSS define the frontend and the backend.
The frontend is the client side and the backend the server side.
When you say active/active, what do you want to achieve exactly ?
You can indeed have 2 Vip and one is active on CSS1 while the other is active on CSS2.
However, if the CSS shares the same set of servers, you need to be careful that the return traffic from the server to the client goes back to the same server. This may require client nat (group config).
Regards,
Gilles.

CSS 11501: NAT all ports?

Hi, I have just a little experience with a CSS 11501, so this may be a dumb question.
I created a service and content rule for a FTP server behind the CSS.
This works fine, the public address is translated to the private address etc.
But what i really would like is to NAT ALL requests for this public address to the private address, so not just FTP but also Remote Desktop (port 3389) etc.
How can i accomplish this?

be carefull that ftp uses data connections.
By specifying the protocol and port you helped the CSS understand it was ftp traffic and therefore monitor the control session to find data sessions and do nating accordingly.
So, instead of removing protocol and port, I would recommend to create a 2nd content rule with the same vip and the same service but no protocol or port.
The first rule will handle ftp.
The 2nd rule will handle the rest.
Regards,
Gilles.

PAT with a single public IP and several servers behind firewall

Hi,
New to the ASA 5505 8.4 software version, but here is what I'm trying to do:
Single static public IP: 16.2.3.4
Need to PAT several ports to three separate servers behind firewall
One server houses email, pptp server, ftp server and web services: 10.1.20.91
One server houses drac management (port 445): 10.1.20.92
One server is the IP phone server using a range of ports: 10.1.20.156
Basically, need to PAT the ports associated with each server to the respective servers behind the ASA 5505.
Here is what I have. Is anything missing from this config? Do I need to include a global policy for PPTP and SMTP?
ASA Version 8.4(4)1
hostname kaa-pix
names
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 10.1.20.1 255.255.255.0
interface Vlan2
nameif outside
security-level 0
ip address 16.2.3.4 255.255.255.0
ftp mode passive
object network obj_any
subnet 0.0.0.0 0.0.0.0
object network server_smtp
host 10.1.20.91
object service Port_25
service tcp source eq smtp
object service Port_3389
service tcp source eq 3389
object service Port_1723
service tcp source eq pptp
object service Port_21
service tcp source eq ftp
object service Port_443
service tcp source eq https
object service Port_444
service tcp source eq 444
object network drac
host 10.1.20.92
object service Port_445
service tcp source eq 445
access-list acl-out extended permit icmp any any echo-reply
access-list acl-out extended permit icmp any any
access-list acl-out extended permit tcp any interface outside eq pptp
access-list acl-out extended permit tcp any object server_smtp eq smtp
access-list acl-out extended permit tcp any object server_smtp eq pptp
access-list acl-out extended permit tcp any object server_smtp eq 3389
access-list acl-out extended permit tcp any object server_smtp eq ftp
access-list acl-out extended permit tcp any object server_smtp eq https
access-list acl-out extended permit tcp any object server_smtp eq 444
access-list acl-out extended permit tcp any object drac eq 445
pager lines 24
logging asdm informational
mtu inside 1500
mtu outside 1500
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
nat (inside,outside) source static server_smtp interface service Port_25 Port_25
nat (inside,outside) source static server_smtp interface service Port_3389 Port_
3389
nat (inside,outside) source static server_smtp interface service Port_1723 Port_
1723
nat (inside,outside) source static server_smtp interface service Port_21 Port_21
nat (inside,outside) source static server_smtp interface service Port_443 Port_4
43
nat (inside,outside) source static server_smtp interface service Port_444 Port_4
44
nat (inside,outside) source static drac interface service Port_445 Port_445
object network obj_any
nat (inside,outside) dynamic interface
route outside 0.0.0.0 0.0.0.0 16.2.3.1 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
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
telnet timeout 5
ssh timeout 5
ssh key-exchange group dh-group1-sha1
console timeout 0
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
prompt hostname context
no call-home reporting anonymous

Thanks Lcambron...I got PPTP to work. Everything else works fine. I can access email, access my web server, FTP server, and PPTP server. However, from the above configuration, I cannot access my DRAC over the internet..The DRAC runs on a different internal server, and over port 445. So I have th following lines:
object network drac
host 10.1.20.92
object service Port_445
service tcp source eq 445
access-list acl-out extended permit tcp any object drac eq 445
nat (inside,outside) source static drac interface service Port_445 Port_445
Am I missing something here? Internally, i can telnet to port 445 on 10.1.20.92, so I know it is listening. However, externally, i cannot telnet to my external ip address of the ASA through port 445.
Thanks

Best practice for web servers behind a router (NAT, ACL, policy-map, VLAN)

Hi,
I'm a new Network admin, and I have some configuration questions about my installation (see attachment).
I have 3 web servers behind a router.
Public interface: 3 public ip adresses
Private interface: router on a stick config ( 3 sub-interfaces, 3 different networks, 3 VLAN)
I would to know the best way to redirect http traffic to the right server.
My idea is to map a public address to a private address, via NAT, but I'm not sure for the configuration. I could also redirect via Policy-map and filter by url content.
So if you have some advise for this case, it would be really appreciated.
Thank you.
Chris.

Hello Christophe,
As I understand you want 1st that ;
if somebody go to A.local.com from internet then he will redirect to 192.168.1.10 in your internal network.
That means, you need static mapping between your public @ip address and your local ip address.
for this example, your local interface is Fa0/0.1 and I dont your public interface because it is not mention in your diagram. I will suppose S0/0 for public interface.
that is the config for the Web Server1. You can do the same with the remaining servers:
interface fa0/0.1
ip nat inside
interface serial0/0
ip nat outside
ip nat inside source static 192.168.1.10 172.1.2.3
static mapping from local to public.
I suppose you have done the dns mapping in your network and the ISP have done the same in his network.
ip route 171.1.2.3 interface serial0/0
or
ip route 0.0.0.0 0.0.0.0 interface serial0/0.
After these step for each web server, you will get the mapping.
Now you can restrict access to this ip only to http or https protocol on your isp and after on your local network
like
ip access-list extended ACL_WebServer1
permit ip any 192.168.1.10 eq www
deny ip any 192.168.1.10
exit
interface fa0/0.1
ip acess-group ACL_WebServer1 in
no shut
exit
That is the first step.
Second step : you want to filter traffic by url, that means layer 5 to 7 filtering.
I am not sure that it is possible using cisco router with (ZBF + Regex).
Check the first step and let us know !
Please rate and mark as correct if it is the case.
Regards,

How to reach real servers direcly behind CSS?

Hi,
I have a webserver in DMZ behind Application firewall and CSS.Now I need to reach real server behind CSS directly. Basicaly this is required for developers and also real server to comminicate to APP and DB servers within our network.
Kinsly suggest.
Regards
KP

KP,
This all depends on how you have this setup. As long as the real servers have routeable
addresses you should be able to directly access the reals. The most common reason
for this failing is simply due to routing (i.e. using private ip addresses).
If the reals are using private addresses then you could also create content rules
with public virtual ip addresses and perform a one-to-one load balancing setup
to be able to directly access the servers.
-Chip
If this answers your question please mark this as Answered.

DMVPN Hub and Spoke behind NAT device

Hi All,
I have seen many documents stating about DMVPN Hub behind NAT or DMVPN Spoke behind NAT.
But My case i involve in both situation.
1) HUB have a Load Balancer (2 WAN Link) ISP A & B
2) Spoke have Load Balancer (2 WAN Link) ISP A & B
Now the requirement is Spoke ISP A Tunnel to HUB ISP A. Spoke ISP B tunnel to HUB ISP B
So total of two DMVPN tunnel from spoke to hub, and i will use EIGRP and PBR to select path.
As I know at HUB site, LB must do Static NAT for HUB router IP, so spoke will point to it as tunnel destination address. At spoke LB, i will do policy route to reach HUB ISP A IP via Spoke ISP A link, HUB ISP B IP via Spoke ISP B link.
HUB and Spoke have to create 2 tunnel with two different network ID but using same source interface.
The Tunnel destination IP at spoke router is not directly belongs to HUB router. Its hold by HUB LB , and forwarded to HUB router by Static NAT.
Any problem will face with this setup? Any guide?
Sample config at HUB.
interface Tunnel0
bandwidth 1000
ip address 172.16.1.1 255.255.255.0
ip mtu 1440
ip nhrp authentication cisco123
ip nhrp map multicast dynamic
ip nhrp network-id 1
ip nhrp holdtime 600
delay 1000
tunnel source FastEthernet0/0
tunnel mode gre multipoint
tunnel key 0
tunnel protection ipsec profile cisco
interface Tunnel1
bandwidth 1000
ip address 172.17.1.1 255.255.255.0
ip mtu 1440
ip nhrp authentication cisco123
ip nhrp map multicast dynamic
ip nhrp network-id 2
ip nhrp holdtime 600
delay 1000
tunnel source FastEthernet0/0
tunnel mode gre multipoint
tunnel key 1
tunnel protection ipsec profile cisco
Spoke Config
interface Tunnel0
bandwidth 1000
ip address 172.16.1.2 255.255.255.0
ip mtu 1440
ip nhrp authentication cisco123
ip nhrp map 172.16.1.1 199.1.1.1
ip nhrp network-id 1
ip nhrp holdtime 300
ip nhrp nhs 172.16.1.1
delay 1000
tunnel source FastEthernet0/0
tunnel destination 199.1.1.1
tunnel key 0
tunnel protection ipsec profile cisco
interface Tunnel1
bandwidth 1000
ip address 172.17.1.2 255.255.255.0
ip mtu 1440
ip nhrp authentication cisco123
ip nhrp map 172.17.1.1 200.1.1.1
ip nhrp network-id 2
ip nhrp holdtime 300
ip nhrp nhs 172.17.1.1
delay 1500
tunnel source FastEthernet0/0
tunnel destination 200.1.1.1
tunnel key 1
tunnel protection ipsec profile cisco

Hi Marcin,
thanks for your reply. The NAT was set up in a way it was/is just to simulate the spoke to be behind NAT device.
About AH and ESP, you are correct there... this was actually my issue. I should have used pure ESP. At the end, TAC actually assisted me with this. Before I called TAC, i did notice the following. ISAKMP traffic was NATed to 3.3.3.3, as expected. Anything after that, did not work and it has to with NAT and AH. Traffic was no longer NATed so the hub, saw the traffic come from 2.2.2.2 rather than 3.3.3.3, you can also see that in the error message you have pointed out. I also saw it in my packet captures. That caught my eye and i started troubleshooting it. I did not understand that AH can't be NATed, Below is TAC's explanation. All is good now. Thanks
. Essentially, it comes down to the fact that AH will encapsulate the entire IP packet (hence why it is the outermost header) with the exception of a few mutable fields, including the DSCP/ToS, ECN, flags, fragment offset, TTL, and the header checksum. Since the source/destination IP addresses & port numbers are actually protected by the AH integrity checking, this means that a device performing a NAT operation on the packet will alter these IP header fields and effectively cause the hub router to drop the packet due to AH failure.
Conversely, ESP traffic is able to properly traverse NAT because it doesn't include the IP header addresses & ports in its integrity check. In addition, ESP doesn't need to be the outermost header of the packet in order to work, which is why devices will attach an outer UDP/4500 header on the traffic going over NAT."

CSS 11501S GSLB DNS

Hi
I am in the process of planning for a GSLB failover solution for a web site. I have attached a very basic diagram showing an example of the topology.
The aim is to have two sites. A primary site and a DR site to be used as a failover solution.
The main site has two web servers that will need to be load balanced and the failover DR site will only have 1 web server.
My initial plan was to use 2 Cisco CSS 11501S devices as I believe this would provide the load balancing and GSLB functionality I require.
To achieve this I was going to use the CSS's as the primary and secondary name servers for the domain. This has raised a few question marksâ¦.
Both of our sites are connected to a private WAN (with private IP ranges). See attached diagram. Our internet access is provide through a third party âFirewall Portâ directly off the WAN. We don't manage the firewall that connects to the internet. This third party firewall provides the NAT for our public facing services (web servers, mail servers, ftp servers etc).
So my questions areâ¦
* Because the CSS's and web servers are located on a private network will the CSS's be able to respond to the DNS requests with the PUBLIC IP address (as seeen from the internet) of the servers as apposed to the private IP address of the servers? If the firewall in front of the CSS's was connected to the internet this could be done via DNS doctoring but our firewall is on a private subnet!
* Is it possible to get the CSS's to respond to DNS requests for other domain devices that do not reside behind the CSS - E.g. a MX record for a mail server that resides on another 'private' network?
*Is there a better way to achieve this?
Any assistance would be much appreciated!!

Thanks for the reponse Gilles. When you say
"If you configure the css to answer with the public ip address, you can't access your vip from the internal network anymore."
Do you mean that you will only get the public ip address from a DNS query and therefore this won't work locally?
If I have a host file entry providing the private address resolution for my internal hosts will this work?
"Also, be aware we do not support GSLB on the CSS anymore.
So, if this is a new install, it is better to start with a solution that we support - GSS"
Why is this no longer supported? Are there a lot of problems with GSLB on the CSS? It is pretty hard to justify the cost of a solution including 2 GSS's for GSLB and 1 CSS for server load balancing when comapred to the price of 2 CSS's with the enhanced license for both GSLB and server load balancing.
I have one client that wants to use their existing CSS's for a solution like this and another that is starting from scratch.
Thanks

CSS 11501 Load Balancing with X-forwarded-for

Hi,
We have a pair of CSS 11501,
Currently it is using source ip for load balancing and 5 servers as backend , however we have users loggin in using http and based on its source IP (ISP PROXY) , it is forwarded to SERVER A.
However, we have a SSL page and when the client switches over to SSL , it is forwarded to SERVER B/C/D/E based on its source IP ( REAL CLIENT IP) .
This will cause the user to be terminated as the 5 servers are independent and not running in a cluster.
Is there any way that we can use the X-Forwarded-For address to load balance so that when users loging , they are sent to SERVER A (Based on X-Forwarded-For Header IP which translate to REAL CLIENT IP).
This way we are able to also send it back to the same server when it uses SSL.
I believe that we should be able to load balance using X-Forwarded-For IP or to rewrite the X-Forwarded-For IP into client source IP
Regards

Hi,
Unfortunately CSS does not support X-Forwarded-For, and even if CSS supports that, this wont work if you are not using SSL termination.
One option that you can use here, is using SSL termination, so you can manage the SSL traffic on HTTP on the CSS, in this way you can use the same HTTP content rule which is the one currently working.
In summary, you will have an SSL content rule that will decrypt the traffic, and this one will use the same content rule that already exist for HTTP, in case that the server is the one doing the redirect to SSL, but this is something that requires testing since depending on the redirect behavior we might have a redirect loop, but without details it is kind of hard to confirm that you will face this with this option.
Another option, which is less complex, is to use a portless content rule, so this content rule will match port 443 and 80 at the same time, and using sticky or balance based on source IP, you will get the same result with less config. The downside is the troubleshooting, but in this way you will have what you want.
content HTTP-HTTPS
    vip address 10.198.44.70
    advanced-balance sticky-srcip
    add service server1
    add service server2
    add service server3
    add service server4
    add service server5
    protocol tcp
    active
Here the content rule is not looking for the destination port, it is just looking for the source IP, and HTTP and HTTPS will end all the time on the same server.
Thanks,
Rodrigo

CSS 11501 Load Balancing Issue

Hi,
We are facing some issue in load balancing in cisco CSS 11501 as we are not able to access the application through virtual IP. Below is the ruuning configuration of the CSS:
CSS11501# sh running-config
!Generated on 10/06/2010 16:51:34
!Active version: sg0810106
configure
!*************************** GLOBAL ***************************
ip route 0.0.0.0 0.0.0.0 132.186.199.1 1
!************************** CIRCUIT **************************
circuit VLAN1
ip address 132.186.199.145 255.255.255.0
!************************** SERVICE **************************
service Server1
ip address 132.186.199.243
port 5001
protocol tcp
keepalive port 5001
active
service Server2
ip address 132.186.199.246
protocol tcp
port 5001
keepalive port 5001
active
!*************************** OWNER ***************************
owner L5_Owner
content L3_Rule
    vip address 132.186.199.146
    protocol tcp
    port 5001
    add service Server1
    add service Server2
    active
content L5_Rule
    vip address 132.186.199.146
    add service Server1
    add service Server2
    protocol tcp
    port 5001
    url "//132.186.199.146:5001/emi"
    active
CSS11501#
Observation : We are able to telnet on VIP: 132.186.199.146 on port 5001, but not able to access the application.
In Actual scenarion customer access application by accessing URL: http://132.186.199.243:5001/emi and once he enter this URL in web browser the request redirects ( by server itself) to URL: https://132.186.199.44:6002/cas/login?service=http%3A%2F%2F132.186.199.243%3A5001%2Femi%2Findex.jsp&acceptStrength=BASIC on backend server for user authenticaton and once user is authenticated then it again redirect to main URL ( http://132.186.199.243:5001/emi ) to access the application but when we are trying to access the application through VIP ( URL: http://132.186.199.146:5001/emi) we are not getting the login page as the request is not gettting redirected to backend server for user authentication.
Please suggest a solution here.

The problem is that you are in one-armed mode.
So you need to configure client nat.
Without nating the client ip address, the server response goes back directly to the client and bypasses the CSS.
Therefore the client receives a response from an unknown server ip address (not the vip).
So configure a group.
For example
group Client
    vip address 132.186.199.146
    add destination service Server1
     add destination service Server2
    active
Also, remove the url command from your content rule.
It is useless in your case and will just make performance worst.
Gilles.

CSS 11501 - SNMP sysname

Hi All
Had a basic query on SNMP polling for CSS 11501..
Im polling a CSS through Ethernet Management Interface, and the SNMP servers are detecting the system name as "Support" instead of the hostname of the device..
SNMP get sysname from x.x.x.x with ****
.1.3.6.1.2.1.1.5.0 = Support
Is there a way to alter the SNMP sysname, to be identical to the hostname of the device ? I dont have issues with other components like routers, switches etc..
Raj

Hi Sachin,
Use the snmp name command to set or modify the SNMP name for this system.
You can specify only one name.
The syntax for this global configuration mode command is as follows:
snmp name "name"
Enter the SNMP name as the unique name assigned to a system by the administrator.
Enter a quoted text string with a maximum of 255 characters.
The standard name convention is the system's fully qualified domain name (for example, [email protected]).
For example:
(config)# snmp name "[email protected]"
To remove the SNMP name for a system and reset it to the default of "Support", enter:
(config)# no snmp name
Best regards,
Sachin Garg

NAT and Servers behind CSS 11501

Similar Messages

Maybe you are looking for