Re: [suse-sparc] DNS request failover with SuSE & squid

Torsten.Lange@GECITS-EU.COM
Date: Thu Apr 12 2001 - 09:08:09 PDT

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    From: Torsten.Lange@GECITS-EU.COM
Date: Thu, 12 Apr 2001 17:08:09 +0100
Message-ID: <OFBC335633.16CF3EF1-ON41256A2C.005868B7@gecits-eu.com>
Subject: Re: [suse-sparc] DNS request failover with SuSE & squid

    thanks for this one.
    unfortunately, the NOTFOUND=continue statement is default, so there has
    been
    no effect when entering it manually to nsswitch.conf.

    the problem with squid and the internal and external name resolution is
    that squid
    should deliver both intra- and internet sites. those internal and external
    http requests
    shall be forwarded to different icp parents based on a simple 'dst' squid
    acl.

    ---------------------------------------------------------------

    in your resolv.conf file you should be able to specify 2 server, if the one
    fails it should default to the next server, if you check you
    /etc/nsswitch.conf file you could add a [NOTFOUND=continue] section to the
    host name resolution.

    Another way of doing it would be to have the resolv.conf file only reflect
    the
    internal DNS for internal hosts ( I assume this is what it is there for)
    and
    then let squid (in the squid.conf file) do the external resolution. You
    could
    tell squid to do name resolution in its conf file, that way, the system
    would
    query the internal dns and squid would query the external DNS.

    Hope this helps

    Torsten.Lange@GECITS-EU.COM wrote:

    > i'm experiencing problems with a dns issue on a sparc suse netra (7.1).
    >
    > i want to have squid (or the os) to request name resolution from 2 dns
    > servers.
    > 1 server resolves intranet addresses only and the other one resolves
    > internet addresses.
    > what do i have to configure to let the os (via resolv.conf) and/or squid
    > proxy try the internet
    > nameserver first and ask the other one *only* if the first request fails.
    > at the moment - i get squid DNS resolution errors because it only tries
    the
    > first nameserver.
    >
    > maybe it doesn't fail over to the other one, because the first one is
    still
    > running but unable to
    > serve the request?
    >
    > any ideas?
    >
    > thanks a lot
    >
    > torsten

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