Re: can't ping LAN machine, NET pings fine

From: Benedict Verheyen (linux4bene_at_pandora.be)
Date: 08/20/03

  • Next message: Louie Miranda: "Re: xfree, matrox millennium G450 problem.." 
    To: debian-user@lists.debian.org
Date: Wed 20 Aug 2003 09:29:27 +0200

    -----------------------
     "Antony Gelberg" <antony@antgel.co.uk> wrote:
    ------------------------

    >Benedict Verheyen wrote:
    >> Hi,
    >>
    >> i have a Debian (testing) machine as a firewall (named arthur) with 2
    >> nics, eth0 that is connected to the internet and gets an ip of the ISP
    >> via DHCP and eth1 which serves ip's for the lan and has ip
    >> 192.168.0.1. Currently there is only 1 other pc (named lancelot)
    >> besides the firewall machine in the network. It gets ip 192.168.0.10
    >> from the DHCP server on the firewall.
    >>
    >> WORKS:
    >> ping from firewall to net
    >> ping from lan to net
    >> surfing net from lan
    >>
    >> DOESN'T WORK:
    >> ping from firewall to lan
    >> ping from lan to firewall
    >>
    >> I have disabled the iptables firewall on the firewall machine to be
    >> sure that this isn't it. Result is the same.
    >
    >Can you post iptables -L just after a ping fails?

    If will do that this afternoon as i'm not behind my box.
    But when i tested, i switched off iptables and allowed everything
    basically:
     iptables -F
     iptables -X
     iptables -P INPUT ACCEPT
     iptables -P OUTPUT ACCEPT
     iptables -P FORWARD ACCEPT

    My firewall has been up all night so i checked the interfaces
    and i saw this:
      eth0, RX (9.7 MB), TX (819KB)
      eth1, RX (810KB), TX (4.4MB)
    This looks fairly normal.
    And i could send email from my lan also.

    I did switch the network devices before. Could this have caused
    the problem? I don't think so because i can surf the net from
    the lan.

    Benedict 

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