Mediacom DNS appears to have gone lame(sigh)
Since my home network is a bit more complex than most, I found some interesting issues with Mediacom’s DNS. Yesterday, our wireless network stopped working (My wife reports that to me: the internet is down, did you pay the bill?) I could ssh in from work, so the connection was definitely working.
A bit of poking around and I find that the old primary DNS server isn’t even responding to queries. Luckily, I run my own dns server on my inner network and it works just fine. My fix for now is to allow a special NAT exception so that my internal dns server and supply dns for every network zone in my house.
I would hope that a full dhcp renewal would provide new, working DNS servers. But ultimately I don’t care since my fix was just a reversion to my old network config anyway.