Re: network unreachable

From: Wim De Smet (kromagg_at_gmail.com)
Date: 12/17/04

  • Next message: kurtz: "Re: /etc/apt/preferences problem - might cause problems when Sarge goes stable!" 
    Date: Fri, 17 Dec 2004 17:25:30 +0100
To: debian-user@lists.debian.org

    On Fri, 17 Dec 2004 11:05:48 -0500, Adam Aube <aaube01@baker.edu> wrote:
    > Alexandru Cabuz wrote:
    >
    > > When I try to ping B from A I get
    > > connect: Network is unreachable
    >
    > > When I try to ping A from B I get
    > > From [IP of machine B] icmp_seq=1 Destination Host Unreachable
    > > From [IP of machine B] icmp_seq=2 Destination Host Unreachable
    > > From [IP of machine B] icmp_seq=3 Destination Host Unreachable
    > >
    > > and so on and so forth...
    >
    > > I can browse the internet from both of them, read my mail, etc. But I
    > > can't for example ssh to either of them.
    >
    > > I have even turned off the firewalls on both of them, and I still get this
    > > error. Something is weird, because I have installed sarge on both these
    > > machines numerous times and never have I gotten this kind of error...
    >
    > Check your routing tables. Are both machines on the same subnet?
    >

    In case he doesn't know how to do that I'll list some commands he
    could try to give us more information:
    ifconfig eth? (replace ? with relevant number)
    route
    iptables -L
    ... and possibly take a look at the arp cache with arp.

    greets,
    Wim 

    -- 
To UNSUBSCRIBE, email to debian-user-REQUEST@lists.debian.org 
with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org
  • Next message: kurtz: "Re: /etc/apt/preferences problem - might cause problems when Sarge goes stable!"

    Relevant Pages

    • Re: Getting an IP address from a MAC address
      ... > from a MAC address??? ... responding to the ping don't exceed the size of your ARP cache, ... Evaluating SSL VPNs' Consider NEOTERIS, chosen as leader by top analysts! ...
      (Security-Basics)
    • Re: Network Security
      ... Looking in your ARP cache after trying to ping will show this problem. ... the networks. ... the security guards and a couple of network ...
      (linux.redhat)
    • Re: Query ARP Cache in vb.net
      ... do away with the ping bit of my code. ... >> I had planned to query DHCP on the WAN to get the MAC addresses, ... >> are security restrictions in place that will restrict this. ... >> Does anybody know how to query the ARP Cache with vb.net code? ...
      (microsoft.public.dotnet.general)
    • Re: get IP from MAC address
      ... GetIpAddrTable is used to get the local arp cache mapping. ... Some ICMP implementations will respond on ... such a ping request. ... implementations will respond to a broadcast ping. ...
      (microsoft.public.win32.programmer.networks)