Network Protocols and Ports

Front

File Transfer Protocol (FTP)

Back

20/21

Front

Secure File Transfer Protocol (SFTP)

Back

22

Front

Secure Shell (SSH)

Back

22

Front

Telnet

Back

23

Front

Simple Mail Transfer Protocol (SMTP)

Back

25

Front

Domain Name System (DNS)

Back

53

Front

Dynamic Host Configuration Protocol (DHCP)

Back

67/68

Front

Trivial File Transfer Protocol (TFTP)

Back

69

Front

Hypertext Transfer Protocol (HTTP)

Back

80

Front

Network Time Protocol (NTP)

Back

123