I have an email cpanel and i can't access it through proxy

[hardcore]

hello, I have pfsense 2.03 on my network with this configuration internet–---cisco router who does nat ----  esxi  vm pfsense proxy with wan ( as dhcp) and lan on the same ip range with gateway dynamic whatever that means

my problem is that I can't access my cpanel for email accounts through it, internet explorer says is forbidden error 403, its an https webpage with port 2083
Please help me  figure out how to configure my proxy in order for this webpage to work.

Other https like google mail works without any problems , also if I don't enable proxy the webpage works so is something in the proxy that cuts it down

PS: I am really new to this

[thermo]

Add the port to squid's list of safe ssl ports.