On 2013-05-02, at 11:59, Charles Gucker <cguc...@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
