| Portnummer |
Name |
| 20 |
FTP File Transfer Protocol Default Data |
| 21 |
FTP File Transfer Protocol Control Data |
| 23 |
Telnet |
| 25 |
SMTP Simple Mail Transport Protocol |
| 53 |
DNS Domain Name Service |
| 79 |
Finger |
| 80 |
HTTP (WWW) Hyper Text Transfer Protocol |
| 110 |
POP3 Post Office Protocol 3 |
| 119 |
NNTP Network News Transfer Protocol |
| 123 |
NTP Network Time Protocol |
| 194 |
IRC Internet Relay Chat |
| 220 |
IMAP3 Interactive Mail Access Protocol 3 |
| 1525 |
Oracle Database Server |
| 3260 |
Lotus cc:Mail-Server |
| 5190 |
AOL American Online Service |
| 6000 |
X11 Window System |