North American Network Operators Group

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Re: identify hostname

  • From: Craig A. Huegen
  • Date: Wed Dec 02 18:06:32 1998

On Wed, Dec 02, 1998 at 11:40:37AM -0500, Phillip Vandry wrote:

==>Don't forget that the original suggestion at the beginning of this thread
==>was that UUnet should filter broadcast addresses on their Cisco routers
==>because their Max TNT's couldn't do it, in other words take care of the
==>networks on which the TNT's sit.

Not that anyone follows the rules, but:

RFC 1812,
"Requirements for IP Version 4 Routers", Section 5.3.5, specifies: 

   A router [...] MUST have an option to
   disable forwarding network-prefix-directed broadcasts.

That particular sentence is followed by another sentence which states
that directed-broadcast MUST default to on; obviously, the RFC
was written before the time of smurf attacks.