To use a server effectively, it’s important to know the relevant network ports. These ports allow communication between different services and applications. Below is a list of common ports often used on Linux and Windows servers.

Program Protocols & Port(s)
Minecraft Server TCP 25565
Teamspeak UDP 9987
TCP 30033
Web Server TCP 80, 443
CS2 Server TCP 27015-27030, 27036-27037
UDP 4380, 27000-27031, 27036
RDP TCP 3389
SQL Server TCP 1433, 1434
FTP TCP 21, 20
SMTP TCP 25
IMAP TCP 143
POP3 TCP 110
LDAP TCP 389
DNS UDP 53
TCP 53
DHCP UDP 67, 68
NTP UDP 123