Port Assignments

This list may help:

Communication with external servers:

• inbound port 25 mail
• inbound port 22 SSH administration
• outbound port 53 DNS lookups
• outbound port 80,

outbound port 443 RPTN, s/w updates, Clam virus sigs outbound port 123-UDP Network Time Protocol outbound port 6568-UDP Reputation submission

Communication with internal servers:

• in/out port 22 Intra-cluster C & C
• in/out port 5432 Intra-cluster database traffic
• in/out port 6568-TCP Intra-cluster storage manager traffic

• outbound port 389 LDAP lookups
• outbound port 636 LDAPS lookups
• outbound port 110,995 POP3 lookups
• outbound port 143,993 IMAP lookups

outbound port 25 Verification server, mail delivery

Those marked with an asterisk may or may not be used depending on your configuration.

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