Very Computer

If I type

% telnet localhost

I get a "Host name lookup failure". this happens with and without a
running named. Of course, my /etc/hosts file has correct permissions (I
had even set it to 777, just to try it out). The commands 'hostname' and
'domainname' give correct results, though. I don't know what can still
be wrong with my setup.

        Thanks
                Rolf

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Rolf Ebert      Conseil en Energetique et Simulation               (Team Ada)
                Beratung fuer Energiesysteme und Simulation


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Rolf Ebert      Conseil en Energetique et Simulation               (Team Ada)
                Beratung fuer Energiesysteme und Simulation


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Quote:>I still have a problem with my configuration. Perhaps someone can give
>me a hint, where to look for more info.
>If I type
>% telnet localhost
>I get a "Host name lookup failure". this happens with and without a
>running named. Of course, my /etc/hosts file has correct permissions (I
>had even set it to 777, just to try it out). The commands 'hostname' and
>'domainname' give correct results, though. I don't know what can still
>be wrong with my setup.
>        Thanks
>                Rolf

: >If I type

: >% telnet localhost

: >I get a "Host name lookup failure". this happens with and without a
: >running named. Of course, my /etc/hosts file has correct permissions (I
: >had even set it to 777, just to try it out). The commands 'hostname' and
: >'domainname' give correct results, though. I don't know what can still
: >be wrong with my setup.

: >        Thanks
: >                Rolf

: Your /etc/hosts file must have this line
: 127.0.0.1   localhost.  permission 777 doesn't solve your problem.  The file
: should be 644 owned by root.

WARNING: the following may not be secure.

I've also noticed that I got hostname lookup failures when the other host
related files in /etc did not have open permissions.  I've solved the
problem by chmod a+r /etc/host*

This gives everyone the ability to read
/etc/host{s.allow,s.deny,.conf,.equiv}
THIS MAY BE A SECURITY HOLE.  But until I narrow down the exact files
necessary to be readable, I'll keep it this way.

The other clue used to determine if this will fix your problem is that as
a normal user, you may get "Hostname lookup failure," but as root,
everything works fine.  If this is not the case, you may want to look
into setting up /etc/resolv.conf

Hope this helps,

Greg Smith

Quote:> : >If I type

> : >% telnet localhost

> : >I get a "Host name lookup failure". this happens with and without a
> : >running named. Of course, my /etc/hosts file has correct permissions (I
> : >had even set it to 777, just to try it out). The commands 'hostname' and
> : >'domainname' give correct results, though. I don't know what can still
> : >be wrong with my setup.

> : >        Thanks
> : >                Rolf

I think it would ba good idea to have program like 'resolvchk' (similar
to uuchk) which generats reports about the current configuation of the
resolver library with warning messages about syntax errors in the config
files or missing config files.

        Rolf
--
-----------------------------------------------------------------------------
Rolf Ebert      Conseil en Energetique et Simulation               (Team Ada)
                Beratung fuer Energiesysteme und Simulation


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