On Mar 28, 2007, at 3:57 PM, Christos Papadopoulos wrote:
Responses with these codes seem to imply the presence of a firewall.
Is this assumption correct or are these codes meaningless?
Not just firewalls - ACLs on routers, too.
A common practice is to either turn off sending of unreachable
On Wed, 28 Mar 2007, Christos Papadopoulos wrote:
> My next question is about responses to ICMP pings (echo request),
> when they return ICMP UNREACHABLE with codes 9,10 or 13.
>
> Responses with these codes seem to imply the presence of a firewall.
> Is this assumption correct or are these code
First, let me thank everyone who responded to my previous
question about routers prioritizing control traffic, your
comments were much appreciated.
My next question is about responses to ICMP pings (echo request),
when they return ICMP UNREACHABLE with codes 9,10 or 13.
These codes are defined a
