Apparently, Livingston routers *can* filter based on
ICMP message type. Good news! Here's how....
>permit icmp src eq 0
>to allow ping responses or
>deny icmp src eq 5
>to deny ICMP Redirects.
ie. the ICMP message type is mapped onto the "src port"
filter. This isn't documented in my copy of the IRX User's
Manual (v1.7), and I haven't been able to test it yet, but it's
accepted as valid syntax for my revision of ComOS (1.8R).
Anyway, kudos to Livingston for a pretty prompt update, and
for monitoring the firewalls list!
Justin Mason I do not speak for Iona.
ie>, with a hyplan at: http://www.iona.ie/www/hyplan/jmason.html