Important Port Numbers

Some Important Port Numbers

Databases

3306 MySQL
1433 MS SQL Server
5432 PostgreSQL

Remote Access - Graphical

3389 MS Remote Desktop
5800 VNC-HTTP
5900 VNC

Remote Access - Console

22 SSH
23 Telnet
512 Rexec
513 Rlogin
514 RSH

Remote Data Transfer & Management

20 FTP Data
21 FTP
69 TFTP
2049 NFS

Directory Service

389 LDAP
636 LDAP Secure
Web
80 HTTP
443 HTTPS
3128 Squid Web Proxy

Mail & Chat

25 SMTP
110 POP3
995 POP3S
143 IMAP
993 IMAPS
5222 Jabber
5223 Jabber SSL

Infrastructure Management

53 DNS
1512 WINS
67 DHCP Server
68 DHCP Client
123/UDP NTP
161 SNMP