P-660R-Tx v3 Series Support Notes
45
All contents copyright © 2008 ZyXEL Communications Corporation.
Service
Port Number
FTP
21
Telnet
23
SMTP
25
DNS (Domain Name Server)
53
www-http (Web)
80
PPTP (Point-to-Point Tunneling
Protocol)
1723
Examples
Internet Access Only
Internet Access with an Internal Server
Using Multiple Global IP addresses for clients and servers
Support Non NAT Friendly Applications
(1) Internet Access Only
In our Internet Access example, we only need one rule where all our ILAs map
to one IGA assigned by the ISP. You can just use the default
Single NAT
or
you could select
Multiple NAT
and select an Address Mapping Set with a
Many-to-One
Rule. See the following figure.
(2) Internet Access with an Internal Server
P-660R-Tx
v3
