What's your router brand/model? If you can let me know, I'll download a manual and have a read on the settings, and see if we can work out what we need to configure up. I'm not sure but it could help to get the machine working correctly, as I've seen networking problems when it's been enabled. If you want to disable, just add 'alias net-pf-10 off' to /etc/nf. You do have ipv6 enabled as well, from the ifconfig, which you could always disable if you prefer, as you're unlikely to be using this. From your ifconfig here, I'm assuming that the Linux machine has the IP of 192.168.2.13 - as that's how it shows in the ifconfig.
