On Thu, Jul 27, 2006 at 12:09:24PM +0300, Juha-Matti Tapio wrote: > On Wed, Jul 26, 2006 at 09:50:25PM +0000, Andy Smith wrote: > > My users get false positives and then I have to tell them that the > > ISP of the person sending the mail applied a TTL that is too low in > > the opinion of SORBS, then I need to explain what DNS TTL is about. > > And after all that when they ask "Okay so why is that bad?" there > > really isn't a good answer other than some paranoid stance regarding > > people changing their RDNS while SORBS looks and then changing it > > back later (WTF???) I cannot advocate a position I find ridiculous, > > much less spend a lot of time doing so. > > I do have kind of a hard time understanding why anyone would refuse to raise > the TTL while they have anyway decided to choose option number two and > change their reverse name to something real. Because the TTL may be under the control of an ISP who refuses to alter it. "It would screw up our automated systems so we won't do it". I'm in process of obtaining a respectable-looking domain name and there is no problem about the ISP changing my rDNS to suit, but they won't alter the TTL. -- Pigeon Be kind to pigeons Get my GPG key here: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x21C61F7F
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