[Bug 682] UseDNS option name can be inaccurate if alternative name service is in use

[bugzilla-daemon at mindrot.org]

http://bugzilla.mindrot.org/show_bug.cgi?id=682

           Summary: UseDNS option name can be inaccurate if alternative name
                    service is in use
           Product: Portable OpenSSH
           Version: 3.7.1p1
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: trivial
          Priority: P5
         Component: sshd
        AssignedTo: openssh-bugs at mindrot.org
        ReportedBy: djast at cs.toronto.edu


The UseDNS option causes the OpenSSH daemon to perform a lookup of the remote
hostname (via getnameinfo() and/or getaddrinfo()) in certain appropriate
circumstances.  Although this is typically a DNS lookup, these routines could be
using a different name service such as /etc/hosts or NIS/NIS+.  In such cases,
the name of the option is misleading.

Moreover, there are some diagnostics within canohost.c which assume that
getnameinfo() is using DNS (e.g., "Nasty PTR record...")



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