PORT

PORT
=====
Port 25; Simple Mail Transfer Protocol (SMTP) 465 (SSL)

DNS 53; TCP & UDP 

Port 80; Hypertext Transfer Protocol (HTTP) 

Port 88; Kerberos TCP & UDP 

Port 102; Message Transfer Agent (MTA) 

Port 110; Post Office Protocol v3 (POP3) (995, SSL)

Port 119; Network News Transfer Protocol (NNTP) 

Port 135; Exchange administration, RPC, client server communication   
RPC 135, 445 & all 1024+ port TCP 

Port 143, Internet Message Access Protocol version 4 (IMAP4) 

Port 389, Lightweight Directory Application Protocol (LDAP) TCP & UDP 

Port 443, HTTP using Secure Sockets Layer (SSL) 

port 465 (ssmtp), 

Port 563, NNTP using Secure Sockets Layer (SSL) 

Port 636, LDAP using Secure Sockets Layer (SSL) 

Port 691, Link State T

Port 993, IMAP4 using Secure Sockets Layer (SSL) 

Port 995, POP3 using Secure Sockets Layer (SSL) 

Port 3268 – Port 3269; Global catalog lookups 


On Exchange Server
=======================
CAS server to CAS server = TCP 80 and TCP 443
Hub server to Hub server = TCP_25
Hub server to Mailbox server = Ephermal port i.e Dynamic TCP port (1024-65535)
Mailbox server to Mailbox Server  = TCP 135, Dynamic TCP (1024-65535), UDP 3343, TCP 64327