North American Network Operators Group

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Re: broken DNS proxying at public wireless hotspots

  • From: Trent Lloyd
  • Date: Sun Feb 04 02:43:20 2007

Hi Joe,

On Sun, Feb 04, 2007 at 01:30:58AM -0500, Joe Abley wrote:
> On 4-Feb-2007, at 00:58, Trent Lloyd wrote:
> >The flaw here is that DNS operates over 53(UDP), last time I  
> >checked SSH
> >doesn't do UDP port forwarding?
> In the interests of dispelling a common myth, DNS operates over both  
> 53/udp and 53/tcp. However, given that a substantial portion of most  
> clients' queries will likely use UDP transport, your fundamental  
> point stands.

Sorry, yes, you are 100% correct in that, but as you say in practice all
client resolver queries are most likely to be over UDP :)