You're running Windows, yes? If so, this is "by design". If Windows is not able to resolve an address by finding a PTR record, it attempts to resolve the address using NetBIOS - to do this, it issues a NetBIOS request to the machine in question and listens for a response. Assuming no firewalls get in the way, the machine will answer that request with it's "computer name" (the locally assigned name that was created during the installation of Windows).
Try using: nbtstat -A 211.149.111.76 and see what comes back (note that the -A must be a capital A, not a lower case a). I'm guessing that the name you are seeing in your mail logs will show up in the output from that command. (I'd try it here, to give you sample output, but I have NetBIOS blocked at my border router.) At 09:13 9/26/2003, jhon wong wrote: >Hi,Jeff: > > According to my knowledge, when gethostbyname >execute RDNS result,it should return FQDN result >if ip has PTR. > But I find that sometimes non FQDN result >is returned and in fact the ip hasn't PTR at all. >That is the problem. > > > > > > > > Hi Davide, > > > > Could his problem have anything to do with Verisign's new policy of > > redirecting lookups for bogus domains to one of their sites? > > > > Jeff > > > > > > - > > To unsubscribe from this list: send the line "unsubscribe xmail" in > > the body of a message to [EMAIL PROTECTED] > > For general help: send the line "help" in the body of a message to > > [EMAIL PROTECTED] > > > > > > >- >To unsubscribe from this list: send the line "unsubscribe xmail" in >the body of a message to [EMAIL PROTECTED] >For general help: send the line "help" in the body of a message to >[EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
