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On Sun, 20 Nov 2005, Micah R Ledbetter wrote: |
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> I have a server out on the net, and it's been up for a week or two. |
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> I've been on and off it all week long, but as of last night, DNS |
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> didn't seem to work for it. Network connectivity worked, because not |
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> only could I ssh *in*, but I could also contact the outside network |
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> as long as I used something in the hosts file or an IP address. |
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> Adding more (known good) DNS servers to /etc/resolv.conf doesn't seem |
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> to help. DNS was working recently, and I haven't changed anything |
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> since then. A reboot didn't help (I would have just stopped && |
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> started networking... but, well, all I have is ssh, so...). |
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> |
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> One very weird thing is that it can apparently send mail to outside |
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> network addresses. It could send to my gmail account fine last night, |
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> though it seemed to take a while (20 minutes or so, when normally |
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> it's instantaneous). I don't have gmail or google in my /etc/hosts. |
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> |
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> I've seen elsewhere to look at the output of iptables, but it has |
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> never been installed. |
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> The contents of /etc/nsswitch.conf are at http://vlack.com/vlack/lol/ |
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> nsswitch.conf. I'm getting nowhere, and I have no idea why. |
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What is /etc/resolv.conf? |
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Are you running a local name server or uses someone else's? |
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If you are using someone else's can you ping them? |
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If you can ping them, install bind-tools and see if you can run direct |
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queries against them with dig or host, something like: |
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dig @xxx.xxx.xxx.xxx -t mx gentoo.org |
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where xxx.xxx.xxx.xxx is the IP of the DNS server you are checking. |
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Lots of troubleshooting options here. |
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