Date: Sat, 12 May 2012 07:11:15 -0700 From: Colin Percival <cperciva@freebsd.org> To: Leslie Jensen <leslie@eskk.nu> Cc: ports@FreeBSD.org Subject: Re: Please test geodns.portsnap.freebsd.org Message-ID: <4FAE6F83.9030808@freebsd.org> In-Reply-To: <4FAE54BA.4060308@eskk.nu> References: <4FADDEE9.1060707@freebsd.org> <4FAE0AEF.9060704@eskk.nu> <4FAE0B8C.7010509@freebsd.org> <4FAE0FC1.1000106@eskk.nu> <4FAE3CA7.5080206@freebsd.org> <4FAE54BA.4060308@eskk.nu>
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On 05/12/12 05:16, Leslie Jensen wrote: > 2012-05-12 12:34, Colin Percival skrev: >> On 05/12/12 00:22, Leslie Jensen wrote: >>> host -t srv _http._tcp.geodns.portsnap.freebsd.org >>> ;; Truncated, retrying in TCP mode. >>> ;; Connection to 172.17.0.1#53(172.17.0.1) for >>> _http._tcp.geodns.portsnap.freebsd.org failed: connection refused. >> >> Ok, you have a broken recursive DNS server configuration. >> >> I'll have A records as a fallback for situations like this where SRV can't be >> used. > > What exactly does that mean? The IP-address is my home router that acts as a > caching DNS for my network. The router in turn uses my ISP's DNS. > > So if there is a configuration issue I'll be willing to drop a letter to my ISP > in order to get it fixed. It's your router. DNS is designed that you can fall back from UDP to TCP if the response is too big tosend in a UDP packet, but your router seems to not provide the fallback TCP service. This is sadly a common mis-design, but usually doesn't cause a huge problem since most DNS responses fit into a UDP packet. The A fallback will point you at the closest portsnap mirror, but you won't get the fail-over behaviour where portsnap will switch mirrors if the first one isn't responding. -- Colin Percival Security Officer, FreeBSD | freebsd.org | The power to serve Founder / author, Tarsnap | tarsnap.com | Online backups for the truly paranoid
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