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On Fri, 21 Dec 2007, Kristian Erik Hermansen wrote: > On Dec 21, 2007 4:48 PM, Gregory Boyce <[hidden email]> wrote: >> No you don't. >> >> 22/tcp open ssh >> 23/tcp closed telnet >> 139/tcp filtered netbios-ssn >> >> Open is obvious. >> Closed means no filtering but nothing listening. >> Filtered means filtered. >> >> Now you do need to make sure that YOUR system isn't filtering the port. > > Right, that's what I really meant to say. Now let me clarify what > this all means... > > OPEN == TCP syn/ack response > CLOSED == TCP rst response > FILTERED == TCP drop, no response
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