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Re: Reverse Proxy that listens and forwards to multiple ports to the same backend server

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ons 2009-08-12 klockan 10:03 -0700 skrev Andy Litzinger:
> Hi all,
>   I'm banging my head on what I think should be a simple config.  I want squid to receive requests on port 80 and forward them on to the origin server on port 80.  I also want squid to receive requests on port 8081 and forward requests to the same origin server on port 8081.
> 
> I have a Load Balancer (BigIP) sitting in front of my Squid server and the origin server Squid points to is also actually a VIP on the LB that sits in front of a pool of real origin servers.
> 
> The goal is simple proxy- I'm not caching anything (that is working fine).
> 
> Clients connect to http/https://my.test.com
> This resolves in my DNS to 192.168.94.225, a VIP hosted on the LB that forwards traffic on to Squid.
> The origin server VIP for the content is 192.168.94.226
> 
> 
> This is what the flows should look like focusing only on the destination TCP port as it goes through each device:
> Desired HTTP request flow:
> Request port 80 ---> LB ---> request port 80 ---> Squid ---> request port 80 ---> origin VIP on LB ----> request port 8080 ---> server listening on port 8080
> 
> Desired HTTPS request flow:
> Request port 443 ---> LB (SSL offload) ---> request port 8081 ---> Squid ---> request port 8081 ---> Origin VIP on LB ----> request port 8081 ---> server listening on port 8081
> 
> 
> What I see happening for the HTTPS requests is that the request arrives properly at the squid server on port 8081, but squid forwards the request to the Origin VIP on port 80 instead of 8081.
> 
> Here is the config I'm trying:
> 
> http_port 80 accel defaultsite=my.test.com
> http_port 8081 accel defaultsite=my.test.com

You probably want defaultside=my.test.com:8081 above... the port
handling in accelerator mode is a little odd sometimes with port seen as
part of the site name.


Regards
Henrik


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