Port 22 - SSH (Secure Shell), Port 80  - HTTP, Port 443 - HTTPS (HTTP Secure), Port 23 - Telnet, Port 53 - DNS (Domain Name System), Port 3389 - Remote Desktop Protocol RDP, Port 67 - DHCP Destination server, Port 68 - DHCP Client, Port 25 - SMTP (Simple Mail Transport Protocol), Port 110 - POP3 (Post Office Protocol), Port 143 - IMAP (Internet Message Access Protocol), Port 21 - FTP (File Transfer Protocol), Port 7 - TCP Echo Service, Port 20 - File Transfer Protocol data transfer, Port 69 - TFTP Trivial File Transfer Protocol, Port 88 - Kerberos Network authentication system , Port 102 - ISO Transport Service Access point (TSAP), Port 135 - Microsoft EPMAP , Port 137 - NetBIOS Name Service , Port 139 - NetBios Session Service , Port 381 - HP Openview HP data alarm manager , Port 464 - Kerberos Change/Set password , Port 465 - Cisco Protocol, Port 587 - SMTP Email message submission, Port 593 - Microsoft DCOM, Model services and Microsoft Exchange Server, Port 636 - LDAP over TLS/SSL lightweight directory access protocol over TLS/SSL, Port 989-990 - FTP over SSL, FTPS protocol (data), FTP over TLS/SSL, Port 993 - IMAP Secure , Port 995 - TCP, UDP, Post Office Protocol 3 over TLS/SSL, Port 161-162 - SNMP/SNMPTRAP Simple Network Management Protocol, remotely monitor network devices,

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