Common port number by service

TCP

20 FTP (data port)

21 FTP (control port)

22 SSH

23 Telnet

25 SMTP

53 DNS (both TCP & UDP)

58 DHCP

80 Apache

110 POP3

111 NFS (Both TCP & UDP)

137, 138, 139 NetBIOS (Both TCP & UDP)

143 IMAP4

161, 162 SNMP (Both TCP & UDP)

179 BGP (Border Gateway Protocol)

389 LDAP (Both TCP & UDP)

443 SSL https, XenCenter

445 CIFS/SMB (Windows file sharing)

636 LDAPS (Both TCP & UDP)

1433 MSSQL

2049 NFS (both TCP & UDP)

3260 iSCSI target

3389 RDP

 

UDP

53 DNS (both TCP & UDP)

67 & 68 BOOTP also used by DHCP

69 TFTP

111 NFS (Both TCP & UDP)

123 Time

137, 138, 139 NetBIOS (Both TCP & UDP)

161, 162 SNMP (Both TCP & UDP)

389 LDAP (Both TCP & UDP)

636 LDAPS (Both TCP & UDP)

2049 NFS (both TCP & UDP)

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