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sysadmin_2015_2's avatar
sysadmin_2015_2
Icon for Nimbostratus rankNimbostratus
Oct 09, 2017

iRule - Add Host Header

Hello,

Currently we use the below iRule to route traffic from a 3rd party company, its been working great so far. But now we have set up a VPN tunnel with this 3rd party where there traffic is nat'd to the virtual servers ip, they are no longer coming in as test.domain.com/qa>VS IP>iRule routes to the appropriate pool. There coming in as for example as 10.1.1.1/qa>VS IP>iRule routes to the appropriate pool. The iRule is still routing correctly because its picking up the URL but because there not coming in as test.domain.com the host binding is not be picked up by IIS. Is there a way insert the host header and still route accordingly?

when HTTP_REQUEST { if {[HTTP::uri] contains "qa/test1" } { pool Pool_QA_test } elseif {[HTTP::uri] contains "prod/test1" } { pool Pool_Prod_test 

    } elseif {[HTTP::uri] contains "qa/test2" } {
           pool Pool_QA_test      

    } elseif {[HTTP::uri] contains "prod/test2" } {
           pool Pool_Prod_test      

    }

}

Thank you for your help!

BIG-IP
cloud
devops
iRules

2 Replies

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  • Faruk_AYDIN's avatar
    Faruk_AYDIN
    Icon for Nimbostratus rankNimbostratus
    Oct 09, 2017

    Try this :

    } elseif {[HTTP::uri] contains "qa/test2" } {
           HTTP::host test.domain.com
           pool Pool_QA_test      

    } elseif {[HTTP::uri] contains "prod/test2" } {
           HTTP::host prod.domain.com    
           pool Pool_Prod_test      

    }
  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Icon for Cumulonimbus rankCumulonimbus
    Oct 09, 2017

    Here is an optimized version of your Irule. 

    when HTTP_REQUEST { 
    switch [HTTP::uri] {
        "qa/test1" -
         "qa/test2"   { 
            HTTP::host test.domain.com
            pool Pool_QA_test
         } 
        "prod/test1" -
        "prod/test2" { 
            HTTP::host prod.domain.com
            pool Pool_Prod_test      
         }
    }
}

    HTTP::host command only modify host header without change of URI