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Ports!
Port Numbers and Uses
Name | Port | Use |
---|---|---|
DHCP | UDP 67 and UDP 68 | assigns IP address |
DNS | Port 53 | resolves domain names to IP |
FTP | TCP 20 and TCP 21 | transfer files |
HTTP | TCP 80 | web servers |
HTTPS | TCP 443 | secure web servers |
IMAP | TCP 143 | retrieves emails |
IMAP over SSL | TCP 993 | retrieves emails securely |
LDAP | TCP 389 | directory services |
LDAPS | TCP 636 | secure directory services |
MGCP | Port 2427 | communication for VoIP |
MySQL | TCP 3306 | database |
NTP | UDP 123 | synchronize clocks |
POP3 | TCP 110 | retrieves emails |
POP3 over SSL | TCP 995 | retrieves emails securely |
RDP | Port 3389 | remote desktop |
SFTP | TCP 22 | secure file transfer |
SIP | Ports 5060 and 5061 | manages sessions |
SMB | TCP 445 | share network resources |
SMTP | TCP 25 | sends emails |
SMTP TLS | TCP 465 | sends emails securely |
SNMP | UDP 161 and UDP 162 | manage network devices |
SSH | TCP 22 | connects to a remote host securely |
SQLnet | TCP 1521 | remote database |
SQL server | Port 1433 | search databases |
Syslog | UDP 514 | logs system info |
Telnet | TCP 23 | unsecure remote host |
TFTP | UDP 69 | transfers files |