cannot connect
Sam Wilson
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.
Sam
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