[tor-bugs] #11600 [Tor]: Strange nameserver fail warning in Tor log

[Tor Bug Tracker & Wiki]

#11600: Strange nameserver fail warning in Tor log
------------------------+--------------------------------
     Reporter:  s7r     |      Owner:
         Type:  defect  |     Status:  new
     Priority:  normal  |  Milestone:  Tor: 0.2.???
    Component:  Tor     |    Version:  Tor: 0.2.6.10
   Resolution:          |   Keywords:  eventdns, libevent
Actual Points:          |  Parent ID:
       Points:          |
------------------------+--------------------------------
Changes (by hdqdak8v32aor):

 * version:  Tor: 0.2.4.21 => Tor: 0.2.6.10


Comment:

 traced and nailed it down:  the leading "dot" character is not valid

 {{{
 Sep 14 02:08:11.275 [info] launch_resolve(): Launching eventdns request
 for ".quikr.com"
 Sep 14 02:08:11.275 [info] evdns_log_cb(): eventdns: Resolve requested.
 Sep 14 02:08:11.275 [info] eventdns: Setting timeout for request
 0x7fcf5c2cd4d0, sent to nameserver 0x7fcf5a1ce460
 Sep 14 02:08:11.275 [info] eventdns: Nameserver 127.0.0.1:53 has failed:
 Bad response 5 (refused)
 Sep 14 02:08:11.275 [warn] eventdns: All nameservers have failed
 Sep 14 02:08:11.275 [info] eventdns: Removing timeout for request
 0x7fcf5c2cd4d0
 Sep 14 02:08:11.275 [info] launch_resolve(): Launching eventdns request
 for "cdn.syndication.twitter.com"
 Sep 14 02:08:11.275 [info] evdns_log_cb(): eventdns: Resolve requested.
 Sep 14 02:08:11.275 [info] eventdns: Setting timeout for request
 0x7fcf5cbdcc80, sent to nameserver 0x7fcf5a1ce460
 Sep 14 02:08:11.278 [notice] eventdns: Nameserver 127.0.0.1:53 is back up
 Sep 14 02:08:11.278 [info] eventdns: Removing timeout for request
 0x7fcf5cbdcc80
 }}}


 {{{
 $ dig +short ".quikr.com"
 dig: '.quikr.com' is not a legal name (unexpected end of input)
 $ dig +short "quikr.com"
 80.157.151.19
 80.157.151.57
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11600#comment:6>
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