POP3 (Post Protocol) | 110 |
NNTP (Network News Transport Protocol) | 119 |
SNMP (Simple Network Management Protocol) | 161 |
SNMP trap | 162 |
SIP (Session Initiation Protocol) | 5060 |
PPTP | 1723 |
Multiple Servers behind NAT Example:
In this case, there are two PCs in the local network accessible for outside users.
Configuring DMZ
A Demilitarized Zone is used to provide Internet services without sacrificing unauthorized access to its local private network. Typically, the DMZ host contains devices accessible to Internet traffic, such as Web (HTTP) servers, FTP servers, SMTP
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