ip link show, trying to setup firehol

Hi other linode users.

I'm trying to setup my firewall, using FireHOL, but have a few questions:

I'm doing a: ip link show, which gives me this result:

1: lo: mtu 16436 qdisc noqueue

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: dummy0: mtu 1500 qdisc noop

link/ether 96:07:0c:24:c2:a9 brd ff:ff:ff:ff:ff:ff

3: eth0: mtu 1500 qdisc pfifo_fast qlen 1000

link/ether fe:fd:cf:c0:48:73 brd ff:ff:ff:ff:ff:ff

4: teql0: mtu 1500 qdisc noop qlen 100

link/void

5: tunl0: mtu 1480 qdisc noop

link/ipip 0.0.0.0 brd 0.0.0.0

6: gre0: mtu 1476 qdisc noop

link/gre 0.0.0.0 brd 0.0.0.0

7: sit0: mtu 1480 qdisc noop

link/sit 0.0.0.0 brd 0.0.0.0

8: ip6tnl0: mtu 1460 qdisc noop

link/tunnel6 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 brd 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00

Anyone who can point me out what each network adapter is for?

Also, when using firehol i keep getting this message:

IMPORTANT WARNING:

–----------------

FireHOL cannot find your current kernel configuration.

Please, either compile your kernel with /proc/config,

or make sure there is a valid kernel config in

/lib/modules/2.6.18.8-linode10/build/.config,

/usr/src/linux/.config or /boot/config-2.6.18.8-linode10

Because of this, FireHOL will simply attempt to load

all kernel modules for the services used, without

being able to detect failures.

: firehol.sh,v 1.231 2004/11/01 00:13:00 ktsaou Exp $

Best regards

Mikkel