Date: Thu, 25 Apr 2002 11:10:35 +0100 (BST) From: Jan Grant <Jan.Grant@bristol.ac.uk> To: "Kevin Kinsey, DaleCo, S.P." <kdk@daleco.biz> Cc: questions <questions@FreeBSD.ORG> Subject: Re: DNS port Number, Protocol Message-ID: <Pine.GSO.4.44.0204251109140.23534-100000@mail.ilrt.bris.ac.uk> In-Reply-To: <004201c1ebb2$b407ca40$b9e2910c@daleco>
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On Wed, 24 Apr 2002, Kevin Kinsey, DaleCo, S.P. wrote: > Thanks, I'll look into it, but everybody except > AT&T says my DNS is "jolly good". (Pardon the > dumb Yank for throwing that at 'ya.) The specific problem is that "email" > from my cellphone to daleco.biz > returns undeliverable, immediately. > > The latest theory is that AT&T wireless does a > ping to determine whether or not a domain exists, > and since I've got that blocked, they write me > off their own lists......"never a dull moment," I > guess. This is an aside, but by blocking ping you're going to cause yourself more heartache than help. ICMP is required for IP to operate properly; at the least, you're removing a vital network diagnosis tool. -- jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/ Tel +44(0)117 9287088 Fax +44 (0)117 9287112 RFC822 jan.grant@bris.ac.uk Talk is cheap: free, as in beer. As in Real Ale, not that Budweiser rubbish. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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