Rewrite rule forward to specific domain and port

I dont have acces to the big IP CLI:

 

 

b virtual (abc-news.east.foo.com) list

 

This is an existing IP that resolves as abc-news.east.foo.com. This is set up as a VS and the current working irule is associated to it, but no pool are associated with this.

 

 

b virtual (server.nbc-news.west.foo.com) list

 

This is a backend server that is running an app listening for request at port 7012

 

 

b pool (server.nbc-news.west.foo.com) list

 

This does not exist

can you try this?

1. create new pool (e.g. foo) containing server.nbc-news.west.foo.com runing on port 7012

2. modify abc-news.east.foo.com virtual server similar to the following configuration

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:443
   ip protocol 6
   rules myrule
   profiles {
      clientssl {
         clientside
      }
      http {}
      serverssl {
         serverside
      }
      tcp {}
   }
}
[root@ve10:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:7012 {}
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   if {[HTTP::uri] equals "/"} {
      HTTP::uri "/Portal/index.html"
   }
   HTTP::header replace Host "server.nbc-news.west.foo.com:7012"
}
}

Have gotten it to redirect however the app is not starting as it previously did.

 

Set up the pool with service port 7012 member is the app server

 

Assigned the VS to use the pool

 

Have tried various iterations of this rule:

 

 

rule myrule {

 

when HTTP_REQUEST {

 

if {[HTTP::uri] equals "/"} {

 

HTTP::uri "/Portal/index.html"

 

}

 

HTTP::header replace Host "server.nbc-news.west.foo.com:7012"

 

}

 

}

 

 

Need to figure out how get the app to run properly.

 

thx

I'd probably throw in some logs at this point. The app may be doing things you didn't expect.

when HTTP_REQUEST {
     log local0. "uri = [HTTP::uri]"
    if { [HTTP::uri] equals "/" } {
        log local0. "changing uri to /Portal/index.html"
        HTTP::uri "/Portal/index.html"
    }
    log local0. "incoming host header = [HTTP::header Host]"
    HTTP::header replace Host "server.nbc-news.west.foo.com:7012"
}

Then if you can, capture on the server side to see what it's sending and receiving.

i have a an alias in dns to handle that translation and that appears to be working.

 

 

I added the log statements (thanks for that) and it appears that the header is not getting re-written. the log reports this:

 

 

Oct 2 15:26:17 local/tmm3 info tmm3[5303]: Rule portral-dev : changing uri to /Portal/index.html

 

Oct 2 15:26:17 local/tmm3 info tmm3[5303]: Rule portral-dev : incoming host header = abc-news.east.foo.com

 

Oct 2 15:26:17 local/tmm3 info tmm3[5303]: Rule portral-dev : incoming host header = abc-news.east.foo.com

 

Oct 2 15:26:17 local/tmm1 info tmm1[5301]: Rule portral-dev : incoming host header = abc-news.east.foo.com

 

Oct 2 15:26:17 local/tmm2 info tmm2[5302]: Rule portral-dev : incoming host header = abc-news.east.foo.com

 

 

abc-news.east.foo.com this does not seem to be getting re-written to server.nbc-news.west.foo.com:7012

 

 

I'm using this rule:

 

when HTTP_REQUEST {

 

log local0. "uri = [HTTP::uri]"

 

if { [HTTP::uri] equals "/" } {

 

log local0. "changing uri to /Portal/index.html"

 

HTTP::uri "/Portal/index.html"

 

}

 

log local0. "incoming host header = [HTTP::header Host]"

 

HTTP::header replace Host "server.nbc-news.west.foo.com:7012"

 

}

 

 

Any Ideas ? Thought that the "header replace Host" would do it but it seem like it's not

 

 

 

 

 

You are logging before the header replacement! You need to add another log statement after the header is replaced.

Thanks !

 

I added a statement

 

 

log local0. "host header after header replace = [HTTP::header Host]" after the HTTP:: header replace, but unfortunately still the header is not getting rewritten.

 

 

 

Oct 2 17:20:48 local/tmm3 info tmm3[5303]: Rule portral-dev : changing uri to /Portal/index.html

 

Oct 2 17:20:48 local/tmm3 info tmm3[5303]: Rule portral-dev : incoming host header = abc-news.east.foo.com

 

Oct 2 17:20:48 local/tmm3 info tmm3[5303]: Rule portral-dev : host header after header replace = abc-news.east.foo.com

 

Oct 2 17:20:49 local/tmm info tmm[5299]: Rule portral-dev : incoming host header = abc-news.east.foo.com

 

Oct 2 17:20:49 local/tmm info tmm[5299]: Rule portral-dev : host header after header replace = abc-news.east.foo.com

 

Oct 2 17:20:49 local/tmm3 info tmm3[5303]: Rule portral-dev : incoming host header = abc-news.east.foo.com

 

 

Oct 2 17:20:49 local/tmm3 info tmm3[5303]: Rule portral-dev : host header after header replace = abc-news.east.foo.com

 

 

Oct 2 17:20:49 local/tmm2 info tmm2[5302]: Rule portral-dev : incoming host header = abc-news.east.foo.com

 

Oct 2 17:20:49 local/tmm2 info tmm2[5302]: Rule portral-dev : host header after header replace = abc-news.east.foo.com

 

 

Must be another method to get this header to re-write.

 

Can you try this with additional debug logging? I assume you're on a pre-v11.0 release which had caching of many of the HTTP:: command values in the same iRule event.

when HTTP_REQUEST {
log local0. "[IP::client_addr]:[TCP::client_port]: [HTTP::method] to [HTTP::host][HTTP::uri]"
if { [HTTP::uri] equals "/" } {
log local0. "[IP::client_addr]:[TCP::client_port]: Rewriting / to /Portal/index.html"
HTTP::uri "/Portal/index.html"
}
HTTP::header replace Host "server.nbc-news.west.foo.com:7012"
}
when HTTP_REQUEST priority 501 {

 Debug logging only--remove or comment out this event once testing is complete
log local0. "[IP::client_addr]:[TCP::client_port]: Updated host/uri: [HTTP::host][HTTP::uri]
}
when HTTP_RESPONSE {
log local0. "[IP::client_addr]:[TCP::client_port]: [HTTP::status] response from [LB::server]. Redirect location: [HTTP::header location]"
}

Aaron

Great help!

 

 

I added as you mention and I'm getting logs - -

 

 

I also added a pool that has one member that uses the service port 7012 that I need and attached the pool to the virtual server.

 

Now i get the initial screen of the app but appears that I may need to add some additional re-writes or programmaticly re-write all headers.

 

 

 

Oct 2 20:06:56 local/tmm info tmm[5299]: Rule portral-dev : 172.24.xx.xx:57203: GET to abc-news.east.foo.com/

 

Oct 2 20:06:56 local/tmm info tmm[5299]: Rule portral-dev : 172.24.xx.xx:57203: Rewriting / to /Portal/index.html

 

Oct 2 20:06:56 local/tmm info tmm[5299]: Rule portral-dev : 172.24.xx.xx:57203: Updated host/uri: server.nbc-news.west.foo.com:7012/caelaPortal/CAELA/index.html

 

Oct 2 20:06:56 local/tmm info tmm[5299]: Rule portral-dev : 172.24.xx.xx:57203: 304 response from p_caela_portal_7012 10.xxx.xx.xx 7012. Redirect location:

 

Oct 2 20:06:56 local/tmm info tmm[5299]: Rule portral-dev : 172.24.xx.xx:57203: GET to abc-news.east.foo.com/js/jquery.tools.min.js

 

Oct 2 20:06:56 local/tmm info tmm[5299]: Rule portral-dev : 172.24.xx.xx:57203: Updated host/uri: server.nbc-news.west.foo.com:7012/js/jquery.tools.min.js

 

Oct 2 20:06:56 local/tmm info tmm[5299]: Rule portral-dev : 172.24.xx.xx:57203: 404 response from p_caela_portal_7012 10.xxx.xx.xx 7012. Redirect location:

 

Oct 2 20:06:56 local/tmm2 info tmm2[5302]: Rule portral-dev : 172.24.xx.xx:57205: GET to abc-news.east.foo.com/images/nav_images.png

 

Oct 2 20:06:56 local/tmm2 info tmm2[5302]: Rule portral-dev : 172.24.xx.xx:57205: Updated host/uri: server.nbc-news.west.foo.com:7012/images/nav_images.png

 

Oct 2 20:06:56 local/tmm3 info tmm3[5303]: Rule portral-dev : 172.24.xx.xx:57204: GET to abc-news.east.foo.com/images/logo_large.png

 

Oct 2 20:06:56 local/tmm3 info tmm3[5303]: Rule portral-dev : 172.24.xx.xx:57204: Updated host/uri: server.nbc-news.west.foo.com:7012/images/logo_large.png

 

Oct 2 20:06:56 local/tmm2 info tmm2[5302]: Rule portral-dev : 172.24.xx.xx:57205: 404 response from p_caela_portal_7012 10.253.90.66 7012. Redirect location:

 

Oct 2 20:06:56 local/tmm3 info tmm3[5303]: Rule portral-dev : 172.24.xx.xx:57204: 404 response from p_caela_portal_7012 10.253.90.66 7012. Redirect location: