- 22 : SSH
- 80 : HTTP
- 443: HTTPS
Port No. Protocol Service Name Aliases Comment
20 TCP ftp-data File Transfer
21 TCP ftp FTP Control
23 TCP telnet Telnet
25 TCP smtp mail Simple Mail Transfer
42 TCP nameserver name Host Name Server
42 UDP nameserver name Host Name Server
53 TCP domain Domain Name
53 UDP domain Domain Name Server
80 TCP http www, http World Wide Web
88 TCP kerberos krb5 Kerberos
88 UDP kerberos krb5 Kerberos
110 TCP pop3 postoffice Post Office Protocol - Version 3
119 TCP nntp usenet Network News Transfer Protocol
123 UDP ntp Network Time Protocol
143 TCP imap imap4 Internet Message Access Protocol
443 TCP https MCom
443 UDP https MCom
500 UDP isakmp ike Internet Key Exchange (IPSec)
514 TCP cmd shell Automatic Authentication
530 TCP,UDP courier rpc RPC
1433 TCP ms-sql-s Microsoft-SQL-Server
1433 UDP ms-sql-s Microsoft-SQL-Server
1434 TCP ms-sql-m Microsoft-SQL-Monitor
1434 UDP ms-sql-m Microsoft-SQL-Monitor
Default Port Assignments for Common Services
Service Name UDP TCP
DHCP client 67
DHCP server 68
DNS client to server lookup (varies) 53 53
POP3 110
RPC 135
SMTP 25
NNTP 119
RPC 135
File shares name lookup 137
File shares session 139
FTP 21
FTP-data 20
HTTP 80
HTTP-Secure Sockets Layer (SSL) 443
Internet Information Services (IIS) 80
IMAP 143
LDAP 389
NNTP 119
Printer sharing name lookup 137
Printer sharing session 139
SMTP 25
SNMP 161
SQL session 139
SQL session 1433
SQL session 1024 - 5000
SQL session mapper 135
SQL TCP client name lookup 53 53
Telnet 23
Terminal Server 3389
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