Nexland ISB SOHO, Руководство пользователя

Страница: 18 / 30

Nexland ISB SOHO: Interface Screens
32
Quick Filters : Forgot that FTP port number? No problem, just click to prevent FTP
access.
Custom Filters...
You must know the Packet Type (TCP or UDP) and Ports Used by the protocol you
wish to block. Enter a short name and the Start and Finish ports used by the protocol
under the appropriate table. If one port is used, enter the same number in both fields.
Multiple protocols and ranges can be defined for very flexible access filters for each
group.
Click “Save” after entering all information for this group.
Nexland ISB SOHO: Interface Screens
33
Special Applications
Certain applications with 2-way communication need ports opened up in the firewall
in order to function. This is true of most games and video/teleconferencing software.
Some popular titles are already predefined, but are disabled by default. You can
enable them here or add new entries. To find out what ports and protocols your
application needs for operation, it's best to consult the application's support section and
search for Firewall or NAT usage. Some applications might need more than one entry
defined and enabled. This is the case when they have multiple port ranges in use.
Existing Special Apps : Some of the predefined Special Application entries are
available from this menu (since they are all disabled by default, you must select,
Enable, and Update the entry) plus any that you have added yourself. If you have
previously made an entry to this screen and you want to
Update or Delete it, you must
first select it from the drop down menu and then click “ Update Fields Below ” to
access it's settings... this is true for enabling predefined Special Apps. Else, if adding
a new entry, don't select from the menu or click “
Clear Form ” before adding new
entry.
Special Application Data...
Name : Give your Special App any short descriptive name.
Enable : Check or uncheck to enable or disable your Special Application (disabling
will close the ports defined below). Remember to click “ Update ” if using with an
existing Special Application.