In the UniverCD, "no ip unreachables" says it will not send the ICMP
Host Unreachable if there is no route found for the address. But the
access-list indicates it would be sent if the packet is denied.
This is ambiguous, since each does not refer to the other, and either
behaviour (if I do both, does ICMP Host Unreachable get sent?) fits
To further complicate things, there is NO WAY (really really weird)
to delete an access-list entry or re-order them. So I need to do it
right the first time, with not even a testing opportunity (so therefore
asking in advance is essential). The documentation even says there
is no way (although I have not read it all yet, clearly if there turns
out to be a hidden way, that's a contradiction).
Fortunately, I don't need to do really sophisticated IP packet filtering
at the 2501 since the inside subnet goes on through another filter router
before reaching our network, and this subnet between them is considered
to be our DMZ part of the firewall. But this does knock out any chance
of replacing that 2nd router (a Livingston IRX that has reached its limit)
with a 2514 unless the documentation turns out to be wrong (I can hope,
and this is not without reason since I've seen many products in the
computer and network field with grossly incorrect documentation).
The UniverCD I have is "Vol. 1, No. 2 Rev. BO". The one cool thing about
is it that I could install it under a web server and read it elsewhere.
Phil Howard KA9WGN +-------------------------------------------------+
Unix/Internet/Sys Admin | When freedom is outlawed.... |
CLR/Fast-Tax | ....only outlaws will be free! |