On Mon 21 Jan 2002 (18:46 -0500), Stephen Griffin wrote:
In the referenced message, Stephen Griffin said:
Hello,
I'm curious about how many networks completely filter all traffic to any ip address ending in either ".0" or ".255".
Just to clarify, since a lot of the messages I'm receiving seem to indicate I was unclear. I'm not trying to determine how I should filter. I'm trying to determine how many other networks filter in such a manner that traffic to/from legitimate hosts is blocked.
One solution, rather than completely filter particular ip addresses, is to simply rate-limit either/both icmp echo request/icmp echo response message types. This should allow these other networks the ability to mitigate smurfs, while still allowing traffic from legitimate ip addresses.
We had to move some ADSL /32's off the .0 address because some idiots out there were filtering on /24 boundaries. Demon never allocates dialup /32's on .0 or .255, because there are misconfigured setups out there. -- Jim Segrave jes@nl.demon.net