front 1 FTP File Transfer Protocol: Transfers files with a remote host
(typically requires authentication of | back 1 TCP PORT 20 (DATA) 21 (CONTROL) UDP PORT |
front 2 SFTP Secure FTP: Provides FTP file-transfer service over an SSH connection | back 2 TCP PORT 22 UDP PORT |
front 3 TFTP Trivial File Transfer Protocol: Transfers files with a remote host
(does not require | back 3 TCP PORT UDP PORT 69 |
front 4 HTTP Hypertext Transfer Protocol: Retrieves content from a web server | back 4 TCP PORT 80 |
front 5 HTTPS Hypertext Transfer Protocol Secure: Secures HTTP transmission over
an unsecured network | back 5 TCP PORT 443 |
front 6 DHCP Dynamic Host Configuration Protocol: Dynamically assigns IP address
information (for | back 6 TCP PORT UDP PORT 67 |
front 7 DNS Domain Name System: Resolves domain names to corresponding IP addresses | back 7 TCP PORT 53 UDP PORT 53 |
front 8 Network Time Protocol: Used by a network device to synchronize its
clock with a time server | back 8 TCP PORT UDP PORT 123 |