That was weird

[sraun]

My mail server was have DNS issues. It was resolving a bunch of domains incorrectly - for instance, gmail.com to 1.0.0.0. There were several domains resolving to 1.0.0.0. I suspect there were some domains resolving to other incorrect addresses - yahoo.com, for one - and there's an indication that it's been happening for some time, slowly getting worse.

I think I've got it fixed now. I changed the resolve.conf - explicitly added my ISP's primary DNS server, and rebooted the box :-(, and rebooted the DSL device.

Unfortunately, I don't actually know what broke! This was something of a shot-gun fix - keep trying different things, some simultaneously.

Comments

[trixtah.livejournal.com]

Are you running your own named/bind? Your root hints might need updating as well, since I'm pretty sure that one of the root DNS hosts changed its IP recently (can't remember which one). For a nice way of automating the updates, this article has a handy procedure: http://www.linux.org/docs/ldp/howto/DNS-HOWTO-8.html

[sraun]

Actually, no. I'm depending on my ISP's.

Having said that - I should examine my assumptions. For some reason, I was assuming that if I ran a local DNS demon, I'd have to use to provide DNS for my domains. I've got no good backup, and it looked like my registrar (Gandi) would either do it for me, or let me do it, but not both. That may be ... a mistake.

Regardless, I can't think of any reason I can't run a local DNS and just use it for local reference.