Those
rules are loaded into the kernel from the /etc/init.d/iptables script (which is automatically
set to run when you start Fedora). See the section ???Using Firewalls with iptables??? for details on
how to work with your firewall manually.
I like to check a few services just to see the rules that the Firewall Configuration screen
creates. Later, if I want to add access to other services on my computer, I can simply
copy one of the lines that allow a service and then change the service number or name to the one I
want to allow. Service numbers and names are included in the /etc/services file. A common
service that a desktop system might want to use and offer is Windows file and printer sharing (using
Samba in Linux). To share files with Samba, you might need to open ports 137, 138, and 139 in your
firewall. (Open Samba ports to local, trusted networks and never to the Internet.)
Configuring a Firewall in Mandriva
Mandriva offers a way of configuring your firewall after Mandriva is installed:
1. From the top panel, select System???Administration???Configure your computer. You are
prompted to enter the root password.
2. Type the root password and click OK. The Mandriva Linux Control Center appears.
NOTE
NOTE
470
Choosing and Installing a Linux Distribution Part III
3.
Pages:
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921