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Common application port values: 
Application

 

 

 

FTP

 

21

 

TCP

 

Web Server

 

80

 

TCP

 

Telnet

 

23

 

TCP

 

 
 
 
 
 
 

 
While all the ports of the PC in the DMZ are exposed to the Internet, Port 
Forwarding only allows the ports that you specified to be opened up. DMZ can 
be understood as a form of Port Forwarding where ALL the ports are forwarded. 
 
DMZ is usually easier to set up, but Port Forwarding is more secure. For the 
user accessing from the Internet, DMZ and Port Forwarding are basically similar 
in function. 
 

 
 

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