Hi, I've configured a Squid instance running a Reverse Proxy configuration as stated in the following link: http://wiki.squid-cache.org/ConfigExamples/Reverse/BasicAccelerator Below the piece of configuration of my Reverse proxy: http_port 174.xxx.xxx.133:80 accel defaultsite=www.mysite.com cache_peer 174.xxx.xxx.133 parent 80 0 no-query originserver name=myAccel acl our_sites dstdomain www.mysite.com http_access allow our_sites cache_peer_access myAccel allow our_sites cache_peer_access myAccel deny all Assuming that I have 2 hosts pointing to the IP "174.xxx.xxx.133" (that is the IP of my Reverse proxy): api.mysite.com sandbox.mysite.com How could I determine what address was used to access my proxy? Is there some header that holds this information? I hope you understand my doubt :) Regards.