Bundled Wintel versions, which go by the name of "tracert" send ICMP.
"Normal", or "Classic" traceroute, spelled "traceroute" send UDP packets
on a high port going out (forget the range exactly but it starts around
30,000+). ICMP messages are returned in both cases from systems in the
trace path, including the target.
JS Wong wrote:
>
> Traceroute uses ICMP, so there isn't any port numbers involved. Just
> allow ICMP in your firewall if you wanna allow traceroute. The IP trace
> on some firewalls will see ICMP packets going in and out through port
> number 0 though.
>
> Regards,
>
> JS Wong
>
> Joshua Miller wrote:
>
> > Hello all,
> >
> > Does anybody know what port or ports a traceroute uses?
> >
> > Thanks.
> >
> > Josh Miller
> >
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