Examples; Sample 1 - Internet Access Only; Figure 7-15 Nat Example 1; Table 7-6 Services And Port Numbers - ZyXEL Communications Prestige 202 User Manual

FTP (File Transfer Protocol)
Telnet
SMTP (Simple Mail Transfer Protocol)
DNS (Domain Name System)
HTTP (Hyper Text Transfer Protocol or WWW, Web)
PPTP (Point-to-Point Tunneling Protocol)
7.6

Examples

7.6.1 Sample 1 – Internet Access Only
In our Internet access example, we only need one rule where all our ILAs (Inside Local Addresses)
map to one dynamic IGA (Inside Global Address) assigned by our ISP.
NAT

Table 7-6 Services and Port Numbers

SERVICES

Figure 7-15 NAT Example 1

Prestige 202 ISDN Router
PORT NUMBER
21
23
25
53
80
1723
7-17