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[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. -- Holger Kruse [holger--rebol--com]