Patrick W. Gilmore wrote:
On Sep 25, 2006, at 9:06 AM, Ian Mason wrote:
ICMP packets will, by design, originate from the incoming interface
used by the packet that triggers the ICMP packet. Thus giving an
interface an address is implicitly giving that interface the ability
to source packets with that address to potential anywhere in the
Internet. If you don't legitimately announce address space then
sourcing packets with addresses in that space is (one definition of)
spoofing.
Who thinks it would be a "good idea" to have a knob such that ICMP
error messages are always source from a certain IP address on a router?
I do. I have suggested much the same in the past.
