underscore in photos_ugc.l.google.com

2011-02-21 Thread Matus UHLAR - fantomas
Helo, did anyone notice that hostname at google has an underscore? lh6.ggpht.com. 86400 IN CNAME photos_ugc.l.google.com. photos_ugc.l.google.com. 300IN A 74.125.39.132 -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT

about a query

2011-02-21 Thread Terry.
Hello, Please see the dig info below. ns1.dns-diy.com is the auth-server of duowan.com domain. My question is, when ns1.dns-diy.com answer with a CNAME for udb.duowan.com, and the answer also include an A RR for that alias, how will the public DNS cache servers handle this answer? Will the DNS

Re: about a query

2011-02-21 Thread Chris Buxton
That depends on the implementation. Really old versions of BIND would have accepted the A record. However, it's not in-bailiwick, so any name server that would accept it is very likely vulnerable to cache poisoning. Current versions of BIND (probably stretching back to somewhere in the 8.2

Question about some oddities in the logs

2011-02-21 Thread Eivind Olsen
Hello. I've recently put into production a new recursive nameserver, and decided to take a look in the logfiles (the old servers didn't have logging enabled so I can't really compare the current logs with whatever the old ones would have been). I understand most of the entries in the logs +

Re: about a query

2011-02-21 Thread Terry.
Thanks a lot Chris. 2011/2/21 Chris Buxton chris.p.bux...@gmail.com: That depends on the implementation. Really old versions of BIND would have accepted the A record. However, it's not in-bailiwick, so any name server that would accept it is very likely vulnerable to cache poisoning.