Brian S wrote: >>> Can someone please confirm this apparent serious bug in CFNetDiagnostics? I'm running OS X 10.6.6. >> >> I'm getting the same interesting results as you in 10.5.8. With the DSL line disconnected from the modem, I ran the code and: >> >> CFNetDiagnosticCopyNetworkStatusPassively() returns -66559 >> CFNetDiagnosticDiagnoseProblemInteractively() launches the Diagnostic.app, which then begins a connection scan using chasing arrows that stalls. > > With the cable modem coax disconnected ( but modem powered and router powered ) the passive call returns -66559 and the snippet prints "Connected". For the interactive call, the app launches, pressed the "continue" button and it walked me through it. It finally suggests restarting the modem. The other tests all work as expected ( same as Robert ). This is OS X 10.6.8. I discovered IsPingable(), in the list archives for 2006. If this function returns _zTrue there can be no doubt that a connection was made. '-------- local fn IsPingable( server as Str255, timeout as UInt8 ) '~'1 dim as Str255 reply dim as Boolean pingable pingable = _false open "UNIX", 99, "ping -c 1 -q -t" + str$( timeout ) + " " + server while ( eof( 99 ) == _false ) line input #99, reply if ( instr( 1, reply, "1 packets received" ) > 0 ) then pingable = _zTrue wend close 99 end fn = pingable include "ConsoleWindow" print "Testing…" long if ( fn IsPingable( "www.apple.com", 4 ) ) print "Connected to internet" xelse print "Not connected" end if '-------- Robert P.