Common Services And Port Numbers; Configuring Virtual Server; Table 16 Virtual Server: Common Services And Port Numbers - ZyXEL Communications P-336M User Manual

You may enter a single port number or a range of port numbers to be forwarded, and the local
IP address of the desired server. The port number identifies a service; for example, web service
is on port 80 and FTP on port 21. In some cases, such as for unknown services or where one
server can support more than one service (for example both FTP and web service), it might be
better to specify a range of port numbers. You can allocate a server IP address that corresponds
to a port or a range of ports.
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.

4.2.1 Common Services and Port Numbers

The most often used port numbers are shown in the following table. Please refer to RFC 1700
for further information about port numbers.

Table 16 Virtual Server: Common 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)

4.2.2 Configuring Virtual Server

To set the virtual server settings, click Advanced > Virtual Server to display the
configuration screen.
Chapter 4 Advanced
ZyXEL P-336M User's Guide
PORT NUMBER
7
21
25
53
79
80
110
119
161
162
1723
44