Default Server Ip Address; Port Forwarding: Services And Port Numbers; Configuring Servers Behind Nat (Example); Table 12 Services And Port Numbers - ZyXEL Communications P-202H V2 User Manual

P-202H Plus v2 User's Guide

6.4.1 Default Server IP Address

In addition to the servers for specified services, NAT supports a default server IP address. A
default server receives packets from ports that are not specified in this screen.
Note: If you do not assign an IP address in Server Set 1 (default server), the ZyXEL
Device discards all packets received for ports that are not specified here or in
the remote management setup.

6.4.2 Port Forwarding: Services and Port Numbers

Use the NAT - Edit SUA/NAT Server Set 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 12 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)

6.4.3 Configuring Servers Behind NAT (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.
69 Chapter 6 Network Address Translation (NAT) Screens
PORT NUMBER
7
21
25
53
79
80
110
119
161
162
1723