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dralom_31747's avatar
dralom_31747
Icon for Nimbostratus rankNimbostratus
Oct 18, 2012

rewiting of URL to two bluecoat

hello,

 

 

I've one F5 with GTM. my problem is for a proxy.pac who are in the bluecoat.

 

When my pc GET http://toto.domain.com:8080/proxy.pac the F5 forward to one of my bluecoat the request. But my bluecat don't reponse to this request because it don't know toto.domain.com.

 

 

I would like my F5 "rewrite" this request toto.domain.com to "bluecoat1.domaine.com" or "bluecoat2.domain.com"

 

 

bluecoat1 and bluecoat2 are in a pool.

 

 

i've thinking to an irules but i don't know how to make this one.

 

 

excuse me for my english !

 

 

thank you for your help

 

 

application delivery
dev
devops
iRules

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  • Mohamed_Lrhazi's avatar
    Mohamed_Lrhazi
    Icon for Altocumulus rankAltocumulus
    Oct 18, 2012
    GTM is a DNS server. Did you mean to say GTM? if yes, is the box also licensed for LTM?

     

    If not, then I am afraid the answer is no, you cannot. GTM recieves a DNS request and answers with a DNS response, no "redirects"

     

     

    Thanks,

     

    Mohamed.
  • Mohamed_Lrhazi's avatar
    Mohamed_Lrhazi
    Icon for Altocumulus rankAltocumulus
    Oct 18, 2012
    OK. Let me help you rephrase your problem:

     

     

    In LTM you have an http Virtual Server configured and is receiving your clients http requests, on port 8080?

     

     

    this virtual server is then load balancing the requests to two back end servers in a pool.

     

     

    You want the Host header to be rewritten before the request is submitted to the backend servers?

     

     

    The replacement header is based on the original header? or is it static?

     

     

    Thanks,

     

    Mohamed.

     

  • Mohamed_Lrhazi's avatar
    Mohamed_Lrhazi
    Icon for Altocumulus rankAltocumulus
    Oct 18, 2012
    The Host header you want to set is static, but varies based on the selected pool memebr, right?

     

     

    If we selected blucoat1, set host header to: bluecoat1.domaine.com

     

    If we selected blucoat2, set host header to: bluecoat2.domaine.com

     

     

     

    This thread seems to be about similar need and it posts an irule you might be able to reuse:

     

    https://devcentral.f5.com/Community/GroupDetails/tabid/1082223/asg/50/aft/1174645/showtab/groupforums/Default.aspx

     

     

    You dont need datagroups if all you need is the logic above.

     

  • Mohamed_Lrhazi's avatar
    Mohamed_Lrhazi
    Icon for Altocumulus rankAltocumulus
    Oct 18, 2012
    Maybe something like: 

     
when HTTP_REQUEST_SEND {
    
    set server [LB::server addr]
    clientside {
        if { [IP::addr $server equals 10.0.0.1] } {
            HTTP::header replace Host "bluecat1.dom.ain" 
        }
        if { [IP::addr $server equals 10.0.0.2] } {
            HTTP::header replace Host "bluecat2.dom.ain" 
        }
    }
}