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Forum Discussion

Joe_Pawlicki_70's avatar
Joe_Pawlicki_70
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Jul 21, 2008

Rewriting HTTP::host

At the risk of looking like a newbie, is this supposed to work?:     when HTTP_REQUEST {   HTTP::host "foo.bar.com"   HTTP::uri "/some_uri"   }     Darned if I...
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Joe_Pawlicki_70's avatar
Joe_Pawlicki_70
Icon for Nimbostratus rankNimbostratus
Jul 22, 2008
Sure. Let's say your company has an app that connects to a web service from an external vendor. And you need to get to that app via "bar.foo.com/widget/some_uri". Now, your internal app server isn't on a routable IP address, so you'd like to go thru the F5, and have it proxy the communication with the external host. However, foo.com may have their own load balancing, or dns round-robin, or decide to change the ip address of host "bar" next week. Therefore, you can't have hard-coded ip address(es) as your pool member(s), or you'll have an outage every time they make a change. Therefore, you'd like to have the F5 resolve this host.domain - and preferably not cache it forever between restarts.

 

 

Again, I can't help but feel I'm missing something basic here. So thanks for bearing with me, and for any suggestions.