X11—used between an X client and server over the network
close (2001 ms)
8080
Vermont Systems / RecTrac Vermont Systems RecTrac (WebTrac) network installer
close (2002 ms)
21
FTP control (command)
close (2002 ms)
22
Secure Shell (SSH), secure logins, file transfers (scp, sftp) and port forwarding
close (2001 ms)
23
Telnet protocol—unencrypted text communications
close (2002 ms)
25
Simple Mail Transfer Protocol (SMTP), used for e-mail routing between mail servers
close (2001 ms)
53
Domain Name System (DNS)
close (2002 ms)
110
Post Office Protocol v3 (POP3)
close (2001 ms)
111
ONC RPC (Sun RPC)
close (2002 ms)
135
Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service, used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM
close (2001 ms)
143
Internet Message Access Protocol (IMAP), management of email messages