Management Setup; Port Forwarding: Services And Port Numbers; Configuring Servers Behind Port Forwarding (Example); Table 70 Services And Port Numbers - ZyXEL Communications NBG410W3G User Manual

Chapter 12 Network Address Translation (NAT)
If you do not assign a Default Server IP address, the ZyXEL Device discards
all packets received for ports that are not specified here or in the remote

management setup.

12.5.2 Port Forwarding: Services and Port Numbers

The ZyXEL Device provides the additional safety of the DMZ ports for connecting your
publicly accessible servers. This makes the LAN more secure by physically separating it from
your public servers.
Use the Port Forwarding screen to forward incoming service requests to the server(s) on your
local network.
The most often used port numbers are shown in the following table. Please refer to RFC 1700
for further information about port numbers.

Table 70 Services and Port Numbers

SERVICES
ECHO
FTP (File Transfer Protocol)
SMTP (Simple Mail Transfer Protocol)
DNS (Domain Name System)
Finger
HTTP (Hyper Text Transfer protocol or WWW, Web)
POP3 (Post Office Protocol)
NNTP (Network News Transport Protocol)
SNMP (Simple Network Management Protocol)
SNMP trap
PPTP (Point-to-Point Tunneling Protocol)

12.5.3 Configuring Servers Behind Port Forwarding (Example)

Let's say you want to assign ports 21-25 to one FTP, Telnet and SMTP server (A in the
example), port 80 to another (B in the example) and assign a default server IP address of
192.168.1.35 to a third (C in the example). You assign the LAN IP addresses and the ISP
assigns the WAN IP address. The NAT network appears as a single host on the Internet.
236
PORT NUMBER
7
21
25
53
79
80
110
119
161
162
1723
NBG410W3G Series User's Guide