Draytek Vigor 2200V, Руководство пользователя

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NAT Setup
5-3
methods.
5.2.1 Port Redirection Table
The Port Redirection is for you to expose internal servers to the public
domain. For example, you run a web server and some users want to
access this web server. You also run an internal SMTP mail server for
your home office and you shall allow your ISP to send whole E-mail to
your SMTP mail server. Consequently, you assign different port number
on the
Port Redirection Table
to different services such as http, smtp,
ftp etc. External users, i.e. people elsewhere on the Internet can then
access your web server via your public IP address. Even if your public
IP address is a dynamic IP address, you can apply the Dynamic DNS
service to obtain an online WAN IP address (such as
hostnmae.dyndns.org) where is able to be mapped to your current
dynamic IP address. Any external user can visit your web server simply
via your online WAN IP address.
The following example shows how an internal FTP server is exposed to
the public domain. The internal FTP server is running on the local host
addressed as 192.168.1.10.