Matching Pairs Ports 2/4Online version Another portion of common ports by Garry Kelso 1 HTTP 2 POP3 3 SNMP 4 SNMP trap 5 DNS name queries 6 DNS zone transfers 7 Kerberos 8 TFTP TCP 53 UDP 88 UDP 69 UDP 161 TCP 80 UDP 162 TCP 110 UDP 53