Novell LINUX ENTERPRISE DESKTOP 10 SP2 - DEPLOYMENT GUIDE 08-05-2008 Deployment Manual page 756

FW_DEV_INT (firewall, masquerading)
The device linked to the internal, private network (such as eth0). Leave this blank
if there is no internal network and the firewall protects only the host on which it
runs.
FW_ROUTE (firewall, masquerading)
If you need the masquerading function, set this to yes. Your internal hosts will
not be visible to the outside, because their private network addresses (e.g.,
192.168.x.x) are ignored by Internet routers.
For a firewall without masquerading, only set this to yes if you want to allow access
to the internal network. Your internal hosts need to use officially registered IP ad-
dresses in this case. Normally, however, you should not allow access to your internal
network from the outside.
FW_MASQUERADE (masquerading)
Set this to yes if you need the masquerading function. This provides a virtually
direct connection to the Internet for the internal hosts. It is more secure to have a
proxy server between the hosts of the internal network and the Internet. Masquerad-
ing is not needed for services a proxy server provides.
FW_MASQ_NETS (masquerading)
Specify the hosts or networks to masquerade, leaving a space between the individ-
ual entries. For example:
FW_MASQ_NETS="192.168.0.0/24 192.168.10.1"
FW_PROTECT_FROM_INT (firewall)
Set this to yes to protect your firewall host from attacks originating in your internal
network. Services are only available to the internal network if explicitly enabled.
Also see FW_SERVICES_INT_TCP and FW_SERVICES_INT_UDP.
FW_SERVICES_EXT_TCP (firewall)
Enter the TCP ports that should be made available. Leave this blank for a normal
workstation at home that should not offer any services.
FW_SERVICES_EXT_UDP (firewall)
Leave this blank unless you run a UDP service and want to make it available to
the outside. The services that use UDP include DNS servers, IPsec, TFTP, DHCP
and others. In that case, enter the UDP ports to use.
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