110/995 POP3 / POP3 over SSL
143/993 IMAP4 / IMAP4 over SSL
25 SMTP
80/443 HTTP / HTTP over SSL
389/636 LDAP / LDAP over SSL
3268 Global catalog LDAP
88 Kerberos
53 DNS
135 RPC End Point Mapper
6001/6002/6004 RPC over HTTP – Encapsulated RPC communication
445 Netlogon service connection
