Here is a list of some of the common ports used by computers:
- FTP
- SSH
- Telnet
- SMTP
- DNS
- DHCP
- TFTP
- HTTP
- Kerberos
- POP3
- NTP
- Microsoft RPC
- NetBIOS
- IMAP4
- SNMP
- BGP
- LDAP
- HTTPS
- ISAKMP
- Syslog
- RIP
- RIPng (IPv6)
- DHCPv6
- FTP over SSL
- IMAP4 over SSL
- POP3 over SSL
- Open VPN
- RADIUS
- MySQL
- Terminal Server
- SIP
- VNC Server
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- 20-21
- 22
- 23
- 25
- 53
- 67-68
- 69
- 80
- 88, 464
- 110
- 123
- 135
- 137-139
- 143
- 161-162
- 264
- 389
- 443
- 500
- 514
- 520
- 521
- 546-547
- 989-990
- 993
- 995
- 1194
- 1812-1813
- 3306
- 3389
- 5060
- 5500