GigaFast Ethernet
Section 6
1)
: The application sends a packet out first to the trigger port.
2)
: All the incoming packets to the specified ports are allowed to pass
the firewall.
Trigger Port
Incoming Ports
There are several predefined well know applications listed on the top of the settings
page. Select an application and Click the “Copy to” index ID.
Each trigger port is used by only one LAN PC at a time. Once a trigger is
occupied, a second LAN PC cannot use that trigger port until the first LAN
PC has released it. (Release means the first PC stops using that trigger
port for more than 5~6 minutes).
For most dial-up ADSL and Cable modem users, it is not easy to get a fixed WAN IP
address when the Wireless Router connects with the Internet. (Whenever the
Wireless Router’s WAN connection type is PPPoE, DHCP client or PPTP client,
then the Wireless Router WAN IP is obtained from the ISP side dynamically).
As a result, it is very difficult to host a Web server or FTP server by using a dial-up
ADSL or Cable modem. Fortunately, there are some non-profitable organizations
,like
, or commercial dynamic DNS service providers, like
or
, that have proposed a solution to serve such
applications.
All of them work in the same way. They need a LAN PC (Internet access capable) to
update their DNS server’s record periodically to keep the WAN IP address up to
date. Most of the differences are the update packet syntax or format and how often
the update event occurs – when dial up is successful or every N minutes.
www.DynDns.org
www.dns2go.com
www.DynIP.com
Dynamic DNS
