Lost all network connectivity after clean FC3 install
Salvatore Indiogine
sindiogine at yahoo.it
Thu Dec 9 18:34:40 UTC 2004
Hi Paul! The output is at the end of the message.
--- Paul Howarth <paul at city-fan.org> ha scritto:
> >>that your packet forwarding rules are broken.
> What's
> >>the output of:
> >>
> >># iptables -n -L
> >>
> >>on the machine connected to the cable modem?
> >
> > iptables -n -L
> > Chain INPUT (policy ACCEPT)
> > target prot opt source
> destination
> > ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0
> tcp dpts:6881:6889
> > RH-Firewall-1-INPUT all -- 0.0.0.0/0
> 0.0.0.0/0
> >
> > Chain FORWARD (policy ACCEPT)
> > target prot opt source
> destination
> > RH-Firewall-1-INPUT all -- 0.0.0.0/0
> 0.0.0.0/0
> > ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Chain OUTPUT (policy ACCEPT)
> > target prot opt source
> destination
> >
> > Chain RH-Firewall-1-INPUT (2 references)
> > target prot opt source
> destination
> > ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
> > ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
> icmp type 255
> > ACCEPT esp -- 0.0.0.0/0 0.0.0.0/0
> > ACCEPT ah -- 0.0.0.0/0 0.0.0.0/0
> > ACCEPT udp -- 0.0.0.0/0
> 224.0.0.251 udp dpt:5353
> > ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0
> udp dpt:631
> > ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
> state RELATED,ESTABLISHED
> > ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0
> state NEW tcp dpt:22
> > REJECT all -- 0.0.0.0/0 0.0.0.0/0
> reject-with icmp-host-prohibited
>
> Interesting; the first rule in the
> RH-Firewall-1-INPUT chain would appear to
> be accepting any packet, thus rendering the
> remaining rules irrelevant.
> However, I'm not an iptables expert and I don't use
> Red Hat's firewall
> utility, so maybe I'm misinterpreting that.
>
> What do you get from:
>
> # iptables -L -n -t nat
Chain PREROUTING (policy ACCEPT)
target prot opt source destination
Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
MASQUERADE all -- 0.0.0.0/0 0.0.0.0/0
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
Thanks!
Enrico
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