RE: Ping Driving me Crazy....
From: Larry Brown (larry.brown_at_dimensionnetworks.com)
Date: 04/18/04
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To: "General Red Hat Linux discussion list" <redhat-list@redhat.com> Date: Sun, 18 Apr 2004 09:44:26 -0400
If that doesn't work, do a...
service iptables stop
and then try the ping tests. You are pinging from internal windows machines
to the internal nic of the linux box right? If the pings then successfully
work ( as I expect they will ) there is a problem with your firewall rules.
If you cannot ping from the windows boxes on the internal network to the
internal nic of the linux box after stopping iptables, since you already
re-installed the nic, I would tend to think there is a problem with the nic
configuration in /etc/sysconfig/network-script/ifcfg-eth1. If shutting down
iptables doesn't allow successfull pings, post to the list the ifcfg-eth1
file mentioned.
Larry
-----Original Message-----
From: redhat-list-bounces@redhat.com
[mailto:redhat-list-bounces@redhat.com]On Behalf Of Jason Staudenmayer
Sent: Sunday, April 18, 2004 9:31 AM
To: 'General Red Hat Linux discussion list'
Subject: RE: Ping Driving me Crazy....
# IGNORE ICMP BROADCASTS
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
Try changing that line it's the only one that refers to icmp request.
Just 'echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts'
I don't even have this file. What version OS are you running?
-----Original Message-----
From: Harry [mailto:hari76@omantel.net.om]
Sent: Sunday, April 18, 2004 8:07 PM
To: General Red Hat Linux discussion list
Subject: Re: Ping Driving me Crazy....
absolutely right, I have a standby Windows 2000 Advanced server with ISA
installed for the same operation and the same network, and when Linux server
breaks down I put this server up, and I am facing no issues with it...so
there has to be something wrong on the Linux Box which I am not able to
figure out.I am an fan of Linux and when stuff like this happens it really
upsets me...hence these discussions!!
Regards
Harry
"In all this world, there is only you
When all else ceases, there is only you"
-- to my MASTER!
Harish
harish@sabnanis.com
harish.sabnani@cyberhutoman.com
----- Original Message -----
From: "Jason Staudenmayer" <jasons@NJAQUARIUM.ORG>
To: "'General Red Hat Linux discussion list'" <redhat-list@redhat.com>
Sent: Sunday, April 18, 2004 6:00 AM
Subject: RE: Ping Driving me Crazy....
> Just bcos you have a Cisco switch doesn't mean it can't break. The good
> switches but they're not indestructible. Also look at the cables
themselves
> are the bough or made? I had a very
> similar problem a few years ago and it turned out to be the switch I was
> using. Never rule out anything based on a product name, they all break,
> eventually.
>
> -----Original Message-----
> From: Harry [mailto:hari76@omantel.net.om]
> Sent: Sunday, April 18, 2004 7:51 PM
> To: General Red Hat Linux discussion list
> Subject: Re: Ping Driving me Crazy....
>
>
> Hi All,
>
> Well let me add something more, this has started happening since a couple
of
> days,do any of you think it could be bcos Eth1 which is the Internal
> Interface is getting clogged with the number of requests that are coming
> from the Windows Clients?and morever bcos of the Blaster Virus and
> Vulnerablities on Ports 135:139, the network may be getting jammed and
hance
> not accepting the ping requests!Therefore is it wise to increase the
Buffer
> Limits of TCP requests ?If yes can I know how it can be done?
>
> I have also attached the Firewall script that I am using.
>
> And Yah cant be a Rj 45/switch issue bcos I am using a Cisco Catalyst 2900
> switch, which is fairly a great switch to have.
>
> Your thoughts on this will be helpful.
>
> Harry
>
>
>
>
> "In all this world, there is only you
> When all else ceases, there is only you"
> -- to my MASTER!
> Harish
> harish@sabnanis.com
> harish.sabnani@cyberhutoman.com
> ----- Original Message -----
> From: "Stephen Kuhn" <skuhn@telpacific.com.au>
> To: "General Red Hat Linux discussion list" <redhat-list@redhat.com>
> Sent: Sunday, April 18, 2004 4:20 AM
> Subject: Re: Ping Driving me Crazy....
>
>
> > On Sun, 2004-04-18 at 21:01, Vladimir Kosovac wrote:
> > > I don't think it's a firewall issue or some weird TCP/IP behaviour.
> > > Check CAT5/RJ45_s, wall sockets if any and try alternate ports on a
> > > switch.
> >
> > Could it be a DNS issue?
> >
> > stephen kuhn - owner
> > ==============================
> > illawarra computer services
> > a kuhn media australia company
> > http://kma.0catch.com
> > ------------------------------------------------------------------
>
>
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