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Forum Discussion

vinhng_96559's avatar
vinhng_96559
Icon for Nimbostratus rankNimbostratus
Oct 03, 2013

Apache virtual hostnames F5 LB

Hi Experts,   I have a question regarding Apache virtual hostnames behind F5 LB. We have a 10.2 LTM box. server1 [x.x.x.x] has mutiple proxy servers to to one leg of the app server internal web1a....
BinaryCanary_19's avatar
BinaryCanary_19
Historic F5 Account
Oct 04, 2013

The LTM does not manipulate hostnames by default, and will transfer exactly what the client specified in the HTTP request. If you are having an issue, it is most likely because your clients are connecting to (for example) f5virtual.example.com, and your web servers are configured to listen for "web3a.example.com" instead. The servers will most likely return a 404 or the default virtual server.

 

To fix this, you need to configure your servers to listen for "virtual[x].example.com" where you then have DNS names that translate those to the F5 address; [x] is any number of your choice, and the F5 will pass it on to the backend server unmodified. The backend server will then respond with the virtual server configured for that hostname.

 

Briefly, your servers should still be configured to listen to those hostnames, but in DNS, the hostnames need to now point to the F5 Virtual server that is load-balancing them.