Re: Lost all network connectivity after clean FC3 install

From: Salvatore Indiogine (sindiogine_at_yahoo.it)
Date: 12/09/04

  • Next message: Craig White: "Re: LDAP failing in FC2" 
    Date: Thu, 9 Dec 2004 19:34:40 +0100 (CET)
To: For users of Fedora Core releases <fedora-list@redhat.com>

    Hi Paul! The output is at the end of the message.

     --- Paul Howarth <paul@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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