[Bug 843] New: nslookup slow to respond

bugzilla at busybox.net bugzilla at busybox.net
Thu Jan 7 11:57:49 UTC 2010


             Build: v1.11.2
           Summary: nslookup slow to respond
           Product: Busybox
           Version: unspecified
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Networking
        AssignedTo: unassigned at busybox.net
        ReportedBy: chris at mesl.co.uk
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0

nslookup takes a long time to respond with answers under some circumstances.
Looking at a tcpdump, it seems that this is when (for example) a broadband
router acting as a DNS proxy, merely forwards the query response as from the
real, external DNS server as opposed to from itself.
Busybox/nslookup ignores the response from the external server and repeats the
By contrast, requests made to the busybox as a proxy itself seem to be answered
almost immediately.
See the attached .cap file for details

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