Billion Electric Company 7300M User Manual

Well-known and Registered Ports 

20 TCP 

FTP 

Data 

21 TCP 

FTP 

Control 

22 

TCP & UDP 

SSH Remote Login Protocol 

23 TCP 

Telnet 

25 

TCP 

SMTP (Simple Mail Transfer Protocol) 

53 

TCP & UDP 

DNS (Domain Name Server) 

69 

UDP 

TFTP (Trivial File Transfer Protocol) 

80 

TCP 

World Wide Web HTTP 

110 

TCP 

POP3 (Post Office Protocol Version 3) 

119 

TCP 

NEWS (Network News Transfer Protocol) 

123 

UDP 

NTP (Network Time Protocol) 

161 TCP 

SNMP 

443 

TCP & UDP 

HTTPS 

1503 TCP 

T.120 

1720 TCP 

H.323 

4000 TCP 

ICQ 

7070 UDP 

RealAudio 

 

 

Item number 

 Type: Select TCP if you wish to search for connection-based application services on the 

remote server using the port number. 

 Port Start & Port End: Enter the public port number & range you wish to configure.  

 IP Address: Enter the IP address of a specific internal server to which requests from the 

specified port is forwarded. 

 Add: Click to add a new virtual server rule. Click again and the next figure appears. 

 Edit: Check the Rule No. you wish to edit and then click “Edit”.