North American Network Operators Group
Date Prev | Date Next |
Date Index |
Thread Index |
Author Index |
Historical
RE: Digital Island sponsors DoS attempt?
- From: Bob K
- Date: Fri Oct 26 14:47:51 2001
On Fri, 26 Oct 2001, Quibell, Marc wrote:
> Finally, I do not believe PMTU uses pings to discover the PMTU. I believe it
> uses TCP or UDP packets at the layers above IP, and it DOES use "ICMP Packet
> Too big" responses (from the receiver) to cut it's packet size. So in
> reality, a router blocking ICMP from being routed through can still send
> these ICMP messages PMTU needs. Is this how you understand it?
Don't forget that routers or hosts beyond (from the point of view of the
host attempting PMTU) your ICMP-blocking router may have smaller MTUs than
the norm and may be trying to send ICMP errors back...
--
Bob <melange@yip.org> | We're all wrong.
|
