Proxy Server Question

[spoma]

I have aquestion about how a proxy server actually transmits and receives http data. If I have PC_A accessing the internet through ProxyServer_B using port 8082 I know that PC_A will only communicate using port 8082. Will ProxyServer_B communicate to the internet using other ports.
When data is transmitted back will PC_A be able to receive data coming in on any port other than port 8082 through ProxyServer_B?
Thanks for the help

 

[ndee]

not highly technical

 

[Nothinman]

PC_A establishes a TCP connection with the Proxy on port 8082, whatever return port is used on PC_A isn't important and is 'randomly' chosen by the IP stack. For HTTP proxie's PC_A says 'I need this page from this server' and the Proxy makes it's own connection to that server and hands the page off to PC_A, the remote site never even knows PC_A exists, the 2 TCP connections are totally seperate.