[97056] in RedHat Linux List
Re: Ping return for down hosts
daemon@ATHENA.MIT.EDU (Willie Twonk)
Sat Oct 31 04:15:25 1998
In-Reply-To: <363A854C.C821B7EC@flwireless.net>
Date: Sat, 31 Oct 1998 19:31:06 +1030
Reply-To: email@ace.net.au
From: "Willie Twonk" <email@ace.net.au>
To: tom@flwireless.net
Cc: redhat-list@redhat.com
Resent-From: redhat-list@redhat.com
On 10/31/98, at 3:34 AM, Thomas Gaume wrote:
>OK, how about another approach?
>
>How about a script that is simular to what you would do if you were
setting up
>a backup server. Machine B checks the status of machine A, if it don't
answer
>have the script running on machine B add the IP address of the ethernet
card
>of machine A, if A starts responding remove the IP address. Obviously
there
>lies a problem in the amount of time both cards would be active on the
same
>IP. But I think this could be avoided by having the checking taking place
on
>private (192.168.x.x) addresses.
Hehe, I hate to tell you but you just sent 2 replies direct to me instead
of the mail list :-)
I am no programmer so can't really help, but what about redirecting all
ping requests only to a PC with duplicate IPs? All other traffic would
still go to the real IPs.
Or, block pings totally as a "security measure". Try pinging
ftp.redhat.com or even microsoft.com and you don't get a reply at all, so
if they can get away with it...
We were recently subject to a smurf attack, thats a pretty good reason to
block pings in my opinion.
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