iptables: input / output chains ..

["HGS: Buchleitner Martin" <mb@hgs.at>]

hi !

i got my pppd running.
i found many about iptables, but i did not find something about input /
output chains.

how may i set the policies ?
how may i set these chains from ipchains to iptables ?

ipchains -A input -i ppp0 -p tcp -s $DNSSERVER 53 -d $IPADDR 1024-65535
-j ACCEPT
ipchains -A output -i ppp0 -p tcp -s $IPADDR 1024-65535 -d $DNSSERVER 53
-j ACCEPT

Thx - martin

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