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hc_andy_35682
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Jan 21, 2011

How to forward traffic when all pool members are down?

Hi All,     We currently have a virtual server (PROXY.EDU_3128_TCP) on the F5 to load balance a number of proxy servers for schools. Schools configure their web browser to point to 210.15.x.x:31...
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hc_andy_35682's avatar
hc_andy_35682
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Jan 23, 2011
Posted By hoolio on 01/21/2011 09:43 AM

 

If the clients are using the LTM virtual server as their proxy server, you couldn't just forward the traffic to the internet. The clients are connecting with a destination IP of the virtual server, so if you forwarded the traffic it would still have a destination IP of the LTM VS and the router(s) wouldn't handle the connection/would send it back to LTM.

 

 

You'd basically need LTM to act as a web proxy server. I've seen some draft iRules for this, but none that have been thoroughly tested or published. I worked on a hack of one a while back, but it didn't support the CONNECT method for HTTPS tunneling.

 

 

Are the clients using a PAC file to get directed to the LTM VS as a web proxy? If so, I wonder if you could modify that PAC file to have a default option of forwarding without a web proxy?

 

 

Aaron

 

Thanks for that Hoolio. Not sure if the clients are using PAC files on their end to get directed to the LTM VS. The idea was for the client (schools) to do NOTHING on their end during this brief maintenance window. I'll google around to see if I can locate an irule that will make the LTM act as a web proxy for now.

 

 

Cheers.

 

 

 

Andy