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selinux is in the Mandriva kernels, but I have not used it. And know not how to invoke it.
your dns should be set to the router, not the machine. (or modem, ..)
IP address: 192.168.1.103
route -n does not show the dns server on my system.
sudo route -n (02-08 22:01)
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 10 0 0 eth1
169.254.0.0 0.0.0.0 255.255.0.0 U 10 0 0 eth1
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 192.168.1.1 0.0.0.0 UG 10 0 0 eth1
What I have found is that our household router (192.168.1.1) is connected to the adsl2 modem (10.1.1.1)
These addresses are the same as the access pages for setup for the relevant devices (internal web-pages)
I hope this helps, regards Glenn
ps, you should be able to get the dns for your device from a web search.