iptables problem

[Igor Khavkine <i_khavki@alcor.concordia.ca>]

Hi, I'm running unstable with a custom built linux-2.4.0. I'm trying
to setup a firewall rule with iptables the following way:

iptables -A INPUT -i ppp0 -p tcp --dport 5865 -j REJECT

The error message I get is:
ipchains: Protocol not available

If I chage REJECT to DROP everything works perfectly. I'm using
PPPoE with the userspace daemon rp-pppoe, so I tried changing
ppp0 to eth0, still gives the same error.

HELP...

Thanks in advance.

Igor

P.S.: please CC me when replying.