Re: Should URL's be pervasive.

[Hroi Sigurdsson]

David O'Brien wrote:

> Do you know how traceroute works??  For one, the destination host cannot
> be listening on the port used.  And you know that each progressive
> traceroute packet sent out bumps the destination port by one, to help
> trace the ICMP "time exceeded" / "port unreachable" responses.

Only UDP traceroute requires that the port not be listened to (otherwise
you wouldn't get a packet back). If using TCP you will get a packet back
(RST/SYNACK/ICMP-portunreachable etc) whether the port is open or not.
In theory at least..

-- 
Hroi Sigurdsson

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