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Old 04-28-2005, 05:05 AM   #1
Registered: Jul 2003
Location: Norway
Posts: 65

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Cannot ping my Fedora 3 machine

A couple of weeks ago, a got another old laptop with 3com network card. I decided to install Fedora Core 3 on it, so I could check out Apache 2.0, php, mysql etc. But it act up really weird.

I have another machine with Fedora Core 1 on it, which I managed to install Apache 1.3, Oracle, SSHD, e-mail server some years ago. I don't remember if I did anything special back then, but it still works perfectly (except SSHD don't start up properly anymore, I have to type "SERVICE SSHD RESTART" manually each time I boot it up to make SSHD start properly).

But the Fedora 3 machine is weird. The internet works fine, yum works fine, Apache 2.0 works fine when I type (the machine IP) in firefox on the Fedora 3 machine.

But it seems it has trouble communicating with the rest of the machines. If I type "ping" from my XP or Fedora 1 machine, it fails. If I type in Fedora 1 or XP browser, it fails. When I look in the ARP tables in my router, only the Fedora 1 and XP machine shows (and my ISP) (well, sometimes, for example, close to reboot it shows, then after a while it disepears).

And no I am getting clueless. Is it something wrong with the network card? Is it the router that won't talk to the 3com card? Or is it this new thing, SELinux (I guess it stands for Secure Linux or something) that prevents me from communicating with my Fedora 3... And why does internet still works, when my router can't see the machine... Do I have to turn UPnP back on?

I am starting getting supspisios of the SELinux thing under the gnome / redhat network setup box. It was not in Fedora Core 1. Otherwise the Fedora Core 3 machine is set up identically to the Fedora 1 machine (different IP of course). But I should be able to ping the machine even though it has a SELinux thing installed, shouldn't I?). And my router should have the machine in the ARP table. Will SELinux prevent me from pinging?

Anyone that can help?
Old 04-28-2005, 07:50 AM   #2
Registered: Mar 2005
Location: Chennai, India
Distribution: Ubuntu, CentOS
Posts: 72

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may your iptables firewall configuration blocks any other machines from accessing your FC3 box. send your iptables -L output.
Old 05-01-2005, 08:39 AM   #3
Registered: Jul 2003
Location: Norway
Posts: 65

Original Poster
Rep: Reputation: 15
I actually turned the IP tables off (using the graphical "services" program)...
Old 05-09-2005, 04:52 AM   #4
Registered: Jul 2003
Location: Norway
Posts: 65

Original Poster
Rep: Reputation: 15
Found the mistake.

Installed Fedora Core 3: All works fine. SSHD works, surfing works, pinging works, yum works.
Runs "yum update".... Downloads heaps of stuff, amoung other lots of ethernet stuff.
Afterwards... I get following error message when I run the gnome network tool, and press "activate" button:

Determining IP information for eth0...PING ( from eth0: 56 (84) bytes of data.

--- ping statistics ---
3 packets transmitted, 0 received, +3 error, 100% packet loss, time 1999ms, pipe 4
And with the network out I cannot run yum again to get updates that fixes this problem:

The computer is a Compaq Armada 7400 (P II 400, 128 Mb RAM, 8 Gb HD (an old laptop).
The network card is a 3Com/Megahertz 3CCFEM556 B Ethernet/Modem (10/100 LAN + 56K Modem).

Guess I should tell the Fedora Core 3 administrators that their updates crashed the machine..... but I am not sure where I do such.

Ah well. Guess I have to try a different Linux distro. Maybe Debian, or Fedora Core 4 when it gets out.
Old 11-09-2005, 06:33 AM   #5
LQ Newbie
Registered: Nov 2005
Location: Boston, MA
Distribution: Fedora Core 4
Posts: 6

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Well, I'm having the same problem in FC4 , so I wouldn't run out and get that.
Old 11-14-2005, 04:51 AM   #6
Registered: Jul 2003
Location: Norway
Posts: 65

Original Poster
Rep: Reputation: 15
I put Debian on that machine in the end, and it works good now. Seems that the network card is switched off sometimes using other distros.


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