WatchGuard Technologies WatchGuard SOHO and SOHO | tc - Manual (Page 52)

Blocking outgoing services
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4 Click Remove a Service.
A list of existing, incoming services appears. Services are identified by
protocol, port number, and destination address.
5 Enable the checkbox next to the services you would like to
remove.
You can disable multiple services simultaneously.
6 Click Submit.
The selected service(s) are removed from the list. The list reappears. To
return to the Configuration menu, click Configuration at the top of the
page.
Blocking outgoing services
By default, the security stance of the SOHO is to allow all outgoing
packets from computers on the private network protected by the
SOHO firewall to the Internet. You can, however, selectively close
your network to certain types of Internet connectivity. For
example, one way to prevent users behind your firewall from
transferring unsafe files from the Internet to the private network is
to block all outgoing FTP.
It is important to remember that each service you block reduces
accessibility to the files and destinations on the Internet. Again,
this is representative of the inherent trade-off between access and
security.
Blocking a TCP or UDP service
The two most commonly used network protocols are TCP and
UDP. You can choose to block outgoing TCP or UDP traffic by port
number or range.
1 Using your Web browser, go to http://192.168.111.1.