User's Manual

Device Configuration
Advanced Setup – NAT (Virtual Server)
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BEC 6900 R21 / RidgeWave 6900 User Manual
Examples of well-known and registered port numbers are shown below. For further information,
please see IANA’s website at http://www.iana.org/assignments/port-numbers
Well-known and Registered Ports
Port Number Protocol Description
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)
443 TCP & UDP HTTPS
1503 TCP T.120
1720 TCP H.323
7070 UDP RealAudio
Using port forwarding does have security implications, as outside users will
be able to connect to PCs on your network. For this reason you are
advised to use specific Virtual Server entries just for the ports your
application requires, instead of using DMZ. As doing so will result in all
connections from the WAN attempt to access to your public IP of the DMZ
PC specified .
If you have disabled the NAT option in the WAN-ISP section, the Virtual
Server function will hence be invalid.
If the DHCP server option is enabled, you have to be very careful in
assigning the IP addresses of the virtual servers in order to avoid conflicts.
The easiest way of configuring Virtual Servers is to manually assign static
IP address to each virtual server PC, with an address that does not fall into
the range of IP addresses that are to be issued by the DHCP server. You
can configure the virtual server IP address manually, but it must still be in
the same subnet as the router.
Attention