WatchGuard Technologies WatchGuard Firebox SOHO Benutzerhandbuch

Seite von 118
User Guide 5.0
67
Blocking External Sites
3
Beneath the Protocol Settings fields, select either TCP Port
UDP Port or Protocol from the drop list.
The Custom Service page refreshes.
4
Define a name for the service in the appropriate field.
5
Enter the protocol number to allow in the Protocol field.
Now that you have created a custom service, you will need to 
specify a filter rule as well as define the incoming and outgoing 
properties.
6
At the Incoming and Outgoing Filter drop lists, select either 
Allow or Deny.
7
Select either Host IP Address, Network IP Address, or Host 
Range from the appropriate drop list.
The configuration page refreshes.
8
Enter either a single host IP address, a network IP address, or a 
the start and end of a range of host IP addresses for this custom 
service in the appropriate fields.
9
Click  the  Add button.
Repeat the last three steps until all the appropriate address information 
for this custom service appears in the appropriate fields.
10 Click the Submit button.
Blocking External Sites
By default, the security stance of the SOHO is to deny all incoming 
packets from the Internet to computers on the trusted network 
protected by the SOHO firewall. However, if a user initiates 
contact with an external site, the return traffic will be allowed 
through the firewall.  You can selectively close your network to 
certain Internet sites entirely.