Nat And Multiple Wan; Port Translation; Table 47 Services And Port Numbers - ZyXEL Communications Vantage CNM User Manual

Note: Many residential broadband ISP accounts do not allow you to run any server
processes (such as a Web or FTP server) from your location. Your ISP may
periodically check for servers and may suspend your account if it discovers any
active services at your location. If you are unsure, refer to your ISP.

Table 47 Services and Port Numbers

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)1723

9.4.2 NAT and Multiple WAN

The ZyWALL has two WAN ports. You can configure port forwarding and trigger port rule
sets for the first WAN port and separate sets of rules for the second WAN port.

9.4.3 Port Translation

The ZyWALL can translate the destination port number or a range of port numbers of packets
coming from the WAN to another destination port number or range of port numbers on the
LAN (or DMZ). When you use port forwarding without port translation, a single server on the
LAN or DMZ can use a specific port number and be accessible to the outside world through a
single WAN IP address. When you use port translation with port forwarding, multiple servers
on the LAN or DMZ can use the same port number and still be accessible to the outside world
through a single WAN IP address.
The following example has two web servers on a LAN. Server A uses IP address 192.168.1.33
and server B uses 192.168.1.34. Both servers use port 80. The letters a.b.c.d represent the
WAN port's IP address. The ZyWALL translates port 8080 of traffic received on the WAN
port (IP address a.b.c.d) to port 80 and sends it to server A (IP address 192.168.1.33). The
ZyWALL also translates port 8100 of traffic received on the WAN port (also IP address
a.b.c.d) to port 80, but sends it to server B (IP address 192.168.1.34).
Note: In this example, anyone wanting to access server A from the Internet must use
port 8080. Anyone wanting to access server B from the Internet must use port
8100.
Chapter 9 Configuration > NAT
SERVICES
Vantage CNM User's Guide
PORT NUMBER
21
25
53
79
80
110
119
161
162
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150