nanog mailing list archives
Re: Google Public DNS Problems?
From: Joe Abley <jabley () hopcount ca>
Date: Thu, 2 May 2013 12:10:40 -0400
On 2013-05-02, at 11:59, Charles Gucker <cgucker () onesc net> wrote:
That's not entirely true. You can easily do lookup for whoami.akamai.net and it will return the unicast address for the node in question (provided the local resolver is able to do the resolution). This is a frequent lookup that I do when I don't know what actual anycast node I'm using.
Using 8.8.8.8 to tell me about whoami.akamai.net tells me what Akamai authoritative server Google last used to answer that query. If I can rely upon there being an Akamai auth server every place there's a Google 8.8.8.8 server, then that does seem fun and useful for identifying the Google node I'm using. Is that the case? (If I ask 8.8.8.8, which is somewhere 30ms from Toronto, about identity.l.root-servers.org/IN/TXT then the answer I get just now is "Paris, France". L-Root and Google/8.8.8.8 are not colocated. So the usefulness of this technique in general to identify Google nodes depends on deployment assumptions.) Joe
Current thread:
- Re: Google Public DNS Problems?, (continued)
- Re: Google Public DNS Problems? Andrew Fried (May 01)
- Re: Google Public DNS Problems? Yang Yu (May 01)
- Re: Google Public DNS Problems? Christopher Morrow (May 01)
- Re: Google Public DNS Problems? shawn wilson (May 01)
- Re: Google Public DNS Problems? Perry Lorier (May 02)
- Re: Google Public DNS Problems? Jay Ashworth (May 02)
- Re: Google Public DNS Problems? Christopher Morrow (May 02)
- Re: Google Public DNS Problems? Jay Ashworth (May 02)
- Re: Google Public DNS Problems? Joe Abley (May 02)
- Re: Google Public DNS Problems? Charles Gucker (May 02)
- Re: Google Public DNS Problems? Joe Abley (May 02)
- Re: Google Public DNS Problems? Joe Abley (May 02)
- whoami.akamai.net [was: Google Public DNS Problems?] Patrick W. Gilmore (May 02)
- Re: whoami.akamai.net [was: Google Public DNS Problems?] Constantine A. Murenin (May 02)
- Re: whoami.akamai.net [was: Google Public DNS Problems?] Patrick W. Gilmore (May 02)
- Re: whoami.akamai.net [was: Google Public DNS Problems?] Christopher Morrow (May 02)
- Re: whoami.akamai.net [was: Google Public DNS Problems?] Cameron Daniel (May 02)
- Re: whoami.akamai.net [was: Google Public DNS Problems?] Constantine A. Murenin (May 02)
- Re: whoami.akamai.net [was: Google Public DNS Problems?] Valdis . Kletnieks (May 02)
- Re: Google Public DNS Problems? Christopher Morrow (May 02)