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anuj_2931's avatar
anuj_2931
Icon for Nimbostratus rankNimbostratus
Nov 28, 2012

Change http host and path (reverse proxy) without redirecting the client

Hi Guys,

 

 

There is a business need where our clients will go to http://www.abc.com/app-a/index.php. I want my f5 to forward that request to http://www.xyz.com/app-xyz/some-more/index.php

 

I do not want the clients to see this in their browser hence want to simulate reverse proxy. I tried this,

 

 

when HTTP_REQUEST {

 

if { [string tolower [HTTP::path]] equals "/app-a/index.php" } {

 

HTTP::path /app-xyz/some-more/index.php

 

HTTP::header replace Host "www.xyz.com"

 

}

 

}

 

 

But this isn't working. I know how redirect works and I could do that with this case but unfortunately that isn't an option.

 

 

Appreciate your help.

 

 

Anuj

 

application delivery
dev
devops
iRules

3 Replies

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  • What_Lies_Bene1's avatar
    What_Lies_Bene1
    Icon for Cirrostratus rankCirrostratus
    Nov 28, 2012
    I think you've missed quotation marks around the new path. I've added some logging too; 

    
when HTTP_REQUEST {
 if { [string tolower [HTTP::path]] equals "/app-a/index.php" } {
  log local0. "Matched HTTP path of /app-a/index.php"
  HTTP::path "/app-xyz/some-more/index.php"
  log local0. "Replaced path"
  HTTP::header replace Host "www.xyz.com"
  log local0. "Replaced host"
 }
}
  • anuj_2931's avatar
    anuj_2931
    Icon for Nimbostratus rankNimbostratus
    Nov 28, 2012
    Hi Steve,

     

     

    Thanks for your response. Our irule is mostly similar minus the logging. I still replaced it with yours. The pool which is part of the Virtual server doesnt serve this the new url or www.xyz.com.

     

     

    I thought F5 will forward the request after looking up DNS. Which I now know will not work.

     

     

    So after this irule before closing the IF Condition. I added the statement

     

     

    pool XYZ-COM-POOL

     

     

    and also tried

     

     

    node 192.168.10.x 80

     

     

    where 10,x node has apache which servers www.xyz.com. I still don't see F5 hitting the node or the pool for www.xyz.com/. What am I doing wrong here.

     

     

    Thanks,

     

    Anuj
  • What_Lies_Bene1's avatar
    What_Lies_Bene1
    Icon for Cirrostratus rankCirrostratus
    Nov 28, 2012
    OK. I don't see why the pool or node commands wouldn't work.

     

     

    1) Do you see log entries to show the path is being matched?

     

    2) The new iRule code won't apply to existing or persisted connections. Fully close whatever browser client you're using to test and test again.

     

    3) Are you 100% sure all subsequent requests will have the same path?

     

    4) If none of the above help, it'll be tcpdump time!