[REBOL] Re: ICMP Support
From: holger:rebol at: 22-Jun-2001 8:57
On Fri, Jun 22, 2001 at 10:33:32AM +0100, Hayes Philip wrote:
> Not a ping echo server but the ability to ping a target !
Why would you want to do that in an application, unless the application
is intended to be a net admin tool ?
If you are thinking about using ICMP ping to test connectivity to sites
before connecting to them: don't ! ICMP ping does not work reliably in
the majority of setups (many personal or corporate firewalls, proxy
setups etc.), so you would get a lot of "false" results even for sites
that are reachable.
Even in setups where ICMP ping does work chances are the results you get
are not typical for TCP or UDP connections, because a lot of backbone
routers on the Internet route ICMP traffic differently than other traffic.