3Com OfficeConnect 3CRWDR200A-75, Руководство пользователя

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Firewall 63
3
The commonly used port with the associated service will be entered in
the table automatically. You may change them manually.
4
Click
Save
/
Apply
to save the settings.And the confirmed entries will be
displayed.
5
Click Add to return to the Virtual Server configuration page to enter
more entries.
The is a total of 32 services can be defined in the Virtual Server.
Special Applications
Figure 40
Special Applications Screen
Select
Special Apps
tab to display
NAT-Port Triggering Setup
screen.
( Figure 40 )
Some software applications require special or multiple connections to
the Internet and these would normally be blocked by the firewall. For
example Internet Telephony or Video conferences require multiple
connections.
So that these special applications can work properly and are not
blocked, the firewall needs to be told about them. In each instance
there will be a trigger port and incoming port(s), where traffic on the
trigger port tells the firewall to open the incoming ports.
Each defined Special Application only supports a single computer user,
and up to 32 Special Applications can be defined. Any incoming ports