Billion M500 User Manual page 100

Examples of well-known and registered port numbers are shown below. For further information, please
see IANA's website at
Well-known and Registered Ports
Port Number Protocol
21 TCP
22 TCP & UDP
23 TCP
25 TCP
53 TCP & UDP
69 UDP
80 TCP
110 TCP
443 TCP & UDP
1503 TCP
1720 TCP
7070 UDP
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 Interface Setup - Internet 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
Attention
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.
http://www.iana.org/assignments/port-numbers
Description
FTP Control
SSH Remote Login Protocol
Telnet
SMTP (Simple Mail Transfer Protocol)
DNS (Domain Name Server)
TFTP (Trivial File Transfer Protocol)
World Wide Web HTTP
POP3 (Post Office Protocol Version 3)
HTTPS
T.120
H.323
RealAudio
96
.