ICMP question

[Nick Drage]

On Thu, Nov 14, 2002 at 03:47:18PM -0600, Darrell F. Dieringer wrote:
> 
> Anyone please feel free to correct me if I'm wrong, but I think your
> original rules would work fine if your "ESTABLISHED" rule was changed
> to "ESTABLISHED,RELATED".  Perhaps the "NEW,ESTABLISHED" rule should
> also say "NEW,ESTABLISHED,RELATED" as well.
> 
> If your internal machine issues an "echo request", the "echo reply"
> will be a "RELATED" packet.  (I'd use icmp type numbers, but I don't
> know them off the top of my head.)

/usr/include/netinet/ip_icmp.h

Is always handy for this kind of thing ( 8 and 0 respectively ).

-- 
FunkyJesus System Administration Team