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  1. #1
    Join Date
    Apr 2003
    Location
    Vancouver, Canada
    Posts
    760

    RH Linux 9 loosing access to ISP's dns

    Hi all,

    One of our newly installed co-lo backup machines looses its 'ability to connect' to our datacenters DNS servers after a period of time. I have to keep restarting 'network' every day, otherwise the whole server looses its ability to do nslookups. Ex: can't send mail, takes forever to login, etc.

    Any ideas? Could it be ipchains? I locked down nearly everything since the machine is only used to backup data to.

    The only place to set the name servers is: /etc/resolv.conf correct??

    Thanks.
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  2. #2
    Have you tested turning ipchains off ?
    So you are using the nameservers located at another datacenter to resolve all dns look ups ?
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  3. #3
    Join Date
    Apr 2003
    Location
    Vancouver, Canada
    Posts
    760
    Originally posted by datums
    Have you tested turning ipchains off ?
    So you are using the nameservers located at another datacenter to resolve all dns look ups ?
    No, the DC that we co-lo with allows us to use their dns servers for look ups.

    Im pretty sure that the problem is ipchains (because portsentry flushes it every 4 hours.)

    I think I will just restart the network service every 4 hours too.
    Paradox Web Hosting - codyw@paradox-group.com
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  4. #4
    Join Date
    Feb 2003
    Location
    Potsdam, NY
    Posts
    648
    you mean "loses"

  5. #5
    Join Date
    Feb 2004
    Posts
    772
    Hi,

    Try to flush your iptables. You are right, nameservers are placed only in /etc/resolv.conf. Also check with your /etc/hosts.allow entry and DNS configurations.

    Regards,

    Bright

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