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