Sam.Wilson at ed.ac.uk
Fri Sep 29 09:37:34 UTC 2006
In article <efi6t1$1hh7$1 at sf1.isc.org>,
Mark Andrews <Mark_Andrews at isc.org> wrote:
> > Ping is generally a bad connection test. It uses ICMP which most firewalls
> > wi
> > ll
> > block.
> Any sane firewall will accept ICMP. TCP and UDP don't
> operate correctly if you block ICMP.
> The only problem with ICMP/ECHO was with directed broadcasts
> and any router purchased in the last 10 years has support
> for directed broadcasts off by default.
With respect there was also the ping of death, and many net admins fear
DDoS with ping so think they should block it.
More information about the bind-users