Mailinglist Archive: opensuse-security (520 mails)

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RE: [suse-security] PING when mail arrives
  • From: Rick Green <rtg@xxxxxxxx>
  • Date: Wed, 13 Dec 2000 12:51:56 -0500 (EST)
  • Message-id: <Pine.LNX.4.21.0012131248330.27982-100000@xxxxxxxxxxxxxxx>
On Wed, 13 Dec 2000, Raffy wrote:

> Thanks for the help in setting up the firewall rules. I was more concerned
> about _WHY_ those pings came at all. Should I contact the admin of that
> DNS-Server or is that a normal behaviour? Any comments?
It's a normal behaviour. It's part of a process called 'route MTU
discovery'.
ICMP is a basic part of the IP protocol suite, and you cannot claim to
be compliant with the IP standards if you do not support ICMP.
--
Rick Green


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