What is happening is I suspect the DNS resolved IP given by my ISP is actually forwarding recursive queries to yet-another-server(s), and is introducing slow name resolution and timeouts. In any case, I will have to involve the ISP in troubleshooting and (hopefully) fixing the problem. I was hoping there is some way to mimic "traceroute" with "dig +trace", I didn't think so, and Mark confirmed it.
On Sunday, April 25, 2010, Warren Kumari <war...@kumari.net> wrote: > > On Apr 25, 2010, at 12:01 AM, Josh Kuo wrote: > > > You need administrative access to see the overides to the normal resolution > process. > > > Just so I understand this completely, by administrative access you mean I > need to be able to log in to each of the resolvers (not administrative access > on my local workstation to do a 'sudo dig example.net a +trace'), correct? > > A follow up question to that... is it even possible to perform such a trace > (revealing all resolvers) with the DNS protocol? > > > 'tis not doable[0]. > > What is the root problem that you are trying to solve here? Is this just to > know because you want to, or are you trying to solve a specific issue? In the > very large majority of cases[1] your machine is going to be querying whatever > is configured in your resolv.conf (or equivalent) and those nameservers will > go do the resolution for you (as opposed to multiple levels of forwarders). > > > [0]: I have horrid visions of someone responding back with some truly > horrendous kludge that involves looking up random strings and querying > heaps-o-servers to see if any of them had cached the answer or something > equally icky. Actually, you cloud see if the server that you query is the one > that actually touches the auth server, but this is all ugly. > > [1]: No hard data here -- does anyone have any sort of guestimate on fraction > of forwarded queries? > > W > > > Or is this purely a designed limitation of dig? > _______________________________________________ > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users > > > _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
