Hi All: The vport option Confused me for a long time. what is the meaning of "vport" option in the "http_port"? Can anyone give me an example to explain it, thank you. I did a test. The Squid.conf as follows: http_port 192.168.0.164:88 accel defaultsite=192.168.24.198 acl all src 0.0.0.0/0.0.0.0 http_access allow all cache_peer 192.168.24.198 parent 8088 0 no-query originserver When Clients access http://192.168.0.164:88/rdims/index.jsp HTTP request header which Squid sent to backend server is: GET /rdims/index.jsp HTTP/1.0 Accept: */* Accept-Language: zh-cn UA-CPU: x86 Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; InfoPath.1; .NET CLR 3.5.30729; .NET CLR 3.0.30618) Host: 192.168.24.198 Via: 1.1 szrd.com:88 (squid/2.6.STABLE21) X-Forwarded-For: 192.168.12.48 Cache-Control: max-age=259200 Connection: keep-alive My originserver port is 8088,Why HOST is 192.168.0.164, I think that the HOST should be 92.168.24.198:8080. I alter HTTP_Port as follow: http_port 192.168.0.164:88 accel vhost defaultsite=192.168.24.198 vport When Clients access http://192.168.0.164:88/rdims/index.jsp HTTP request header which Squid sent to backend server is: GET /rdims/index.jsp HTTP/1.0 Accept: */* Accept-Language: zh-cn UA-CPU: x86 Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; InfoPath.1; .NET CLR 3.5.30729; .NET CLR 3.0.30618) Host: 192.168.24.198:88 Via: 1.1 szrd.com:88 (squid/2.6.STABLE21) X-Forwarded-For: 192.168.12.48 Cache-Control: max-age=259200 Connection: keep-alive Now why the Host is 192.168.0.164:88? I alter HTTP_Port again: http_port 192.168.0.164:88 accel vhost defaultsite=192.168.24.198 vport=8088 When Clients access http://192.168.0.164:88/rdims/index.jsp HTTP request header which Squid sent to backend server is: GET /rdims/index.jsp HTTP/1.0 Accept: */* Accept-Language: zh-cn UA-CPU: x86 Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; InfoPath.1; .NET CLR 3.5.30729; .NET CLR 3.0.30618) Host: 192.168.24.198 Via: 1.1 szrd.com:88 (squid/2.6.STABLE21) X-Forwarded-For: 192.168.12.48 Cache-Control: max-age=259200 Connection: keep-alive Why the host is 192.168.0.164:88? I think that the HOST should be 92.168.24.198:8088. At last the vport must be used with vhost? Thank you.