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| see for yourself http://208.67.219.231/ now then, my ipconfig /all reports[indent:2588ne5t]Windows IP Configuration Host Name . . . . . . . . . . . . : ltbeard Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : socal.rr.com Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : socal.rr.com Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast Eth ernet NIC Physical Address. . . . . . . . . : 00-xx-yy-3D-zz-00 Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IP Address. . . . . . . . . . . . : 192.168.0.4 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.0.1 DHCP Server . . . . . . . . . . . : 192.168.0.1 DNS Servers . . . . . . . . . . . : 208.67.222.222 208.67.222.220 Primary WINS Server . . . . . . . : 192.168.0.4 Lease Obtained. . . . . . . . . . : Wednesday, April 22, 2009 8:29:17 AM Lease Expires . . . . . . . . . . : Monday, January 18, 2038 8:14:07 PM[/indent:2588ne5t] (yes, the DNS addresses are for the OpenDNS servers but the symptom below was present even with the original ISP dns addresses) First, ping http://www.google.com works well as does the http: shown above. HOWEVER, [sample:2588ne5t]C:\Documents and Settings\Jeff>nslookup http://www.google.com Server: resolver1.opendns.com Address: 208.67.222.222 Non-authoritative answer: Name: http://www.google.com.socal.rr.com Address: 208.67.216.132[/sample:2588ne5t]the addition of the suffix forces the lookup to return an address related to the DNS: 208.67.216.132 (use the default DNS addresses and the same thing happens). substitute the google ip addres and we get a reasonable reply[sample:2588ne5t]C:\cygwin\home\Jeff>nslookup 208.67.219.231 Server: resolver1.opendns.com Address: 208.67.222.222 Name: google.navigation.opendns.com Address: 208.67.219.231[/sample:2588ne5t] NSLOOKUP is bypassing the resolve mechanism whereas ping and everyone else applies it correctly, even a perl script [sample:2588ne5t]C:\cygwin\home\Jeff>iplookup.pl http://www.google.com http://www.google.com -> 208.67.219.231 which is correct[/sample:2588ne5t] I believe that the Connection-specific DNS Suffix . : socal.rr.com is causing the issue, but can't seem to get it removed sucessfully. This has been a long standing issue which I've just ignored (btw: which also prompted the writing of the iplookup.pl script ). Anyone with ideas? The proper response from nslookup domain.name -> is the ip address assigned that domain
__________________ J. O. Beard; you + tech-101.com => synergism. Secure your system now Last edited by jobeard; 10-31-2009 at 01:53 PM. Reason: solved next comment |
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| I think I understand. This is not my strongest subject Nslookup will always devolve the name from the current context. If you fail to fully qualify a name query (that is, use trailing dot), the query will be appended to the current context. In your example, the current DNS settings are social.rr.com and a query is performed on http://www.google.com; the first query will go out as http://www.google.com.social.rr.com because of the query being unqualified. The trailing dot makes the domain name absolute and technically unambiguous. No software is expected to append anything to such a domain name when looking it up in DNS. With the absence of the trailing dot, some software may theoretically attempt to append one or more suffixes and the consequences can range from harmless redundant lookups to potentially dangerous lookups of things that are not meant to be looked up. I believe you can simply use a Fully Qualified Domain Name (that is, add the trailing dot to the name).
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| UNBELIEVABLE! Now teach me where you found or got this insight!!! case #1[sample:3l40d2ep]C:\Documents and Settings\nMaster>nslookup http://www.google.com. Server: resolver1.opendns.com Address: 208.67.222.222 Non-authoritative answer: Name: google.navigation.opendns.com Addresses: 208.67.219.231, 208.67.219.230 << real google.com addresses ![]() Aliases: http://www.google.com[/sample:3l40d2ep] case #2[sample:3l40d2ep]C:\Documents and Settings\nMaster>nslookup http://www.google.com Server: resolver1.opendns.com Address: 208.67.222.222 Non-authoritative answer: Name: http://www.google.com.socal.rr.com Address: 208.67.216.132 << part of OpenDNS
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| I don't know for sure. I had notes on it from various sites, because i was having DNS problems a while back.
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