Everyone a great god, I am novice, installed on a Linux server is configured with squid proxy
Running normally, but when access url with port (for example: http://X.X.X.X:81/) tip
The requested url could not be retrieved error
Closed on IE agent, access to the same: 81 port of the url is normal
So I want to ask next, what if they were going to configure on the squids can access the port 80 url?

Tomcat the port 8080, for example, now may not be able to use this agent also
In addition, these are all within the local area network (LAN), including agent and have access to the web server is also within the local area network (LAN)
Troublesome everybody a great god help me, thank you!