Out of a /24 currently? Perhaps 25%. I realize I'm a bit unusual in this regard, but $WORK has not only SMTP to worry about, but also partner/customer/vendor requirements for VPNs written into some contracts.
Plus, we're about to change ISPs, which is starting to cause me the usual round of planning headaches. Kurt On Sun, Sep 4, 2011 at 09:20, Andrew S. Baker <[email protected]> wrote: > > >>So, if your ISP won't delegate, you're stuck doing two DNS updates whenever > >>you change addresses on something that should have a reverse. > > And what percentage of the A records that you expose to the world need > corresponding PTR records? > > ASB > http://XeeMe.com/AndrewBaker > Harnessing the Advantages of Technology for the SMB market… > > > > > On Sat, Sep 3, 2011 at 11:57 PM, Kurt Buff <[email protected]> wrote: >> >> So, if your ISP won't delegate, you're stuck doing two DNS updates >> whenever you change addresses on something that should have a reverse. >> >> That's less than ideal, and I'll bet it's also pretty common. >> >> o- I suppose that means you need to be picky about your ISP, if you're >> a business and have choices >> >> o- Gawd, I can't wait for IPv6 to blossom. That *might* help with this issue. >> >> Kurt >> >> On Sat, Sep 3, 2011 at 04:09, Paul Hutchings <[email protected]> >> wrote: >> > It depends on your ISP and whether your netblock is tied to them. >> > >> > If you have PI (provider independent) space you can delegate the DNS >> > servers at the registry to whoever you wish. >> > >> > If you have PA (provider allocated) space you're left with your ISP and >> > whether they will delegate out your block or not. >> > >> > I've noticed that some DNS providers seem to charge a lot more for reverse >> > DNS than forward DNS. Not sure there's a technical reason for that tbh. >> > ________________________________________ >> > From: Kurt Buff [[email protected]] >> > Sent: 03 September 2011 12:53 AM >> > To: NT System Admin Issues >> > Subject: Re: When DNS for your ISP goes down... >> > >> > On Fri, Sep 2, 2011 at 12:23, Ben Scott <[email protected]> wrote: >> >> On Thu, Sep 1, 2011 at 12:05 PM, Steven Peck <[email protected]> wrote: >> >>> If you move your DNS now, your DNS will be ISP vendor >> >>> neutral/independent and that's something that can be done >> >>> easily now if your connectivity suffers in the future it's one less >> >>> thing to do later. >> >> >> >> +53 >> >> >> >> Having your DNS tied to your connectivity or web hosting provider is >> >> not good. Having it independent means you can change other things >> >> much easier. Highly recommended. >> >> >> >> For example: Suppose you're changing connectivity providers at the >> >> office hosting your mail. With independent DNS, you simply add a new >> >> A record and a new MX record, leaving the old records intact. You >> >> allow time to propagate. Then switch cables, then cancel the old >> >> service. Nobody even notices. >> >> >> >> -- Ben >> > >> > Forgive the ignorance, but where does this leave PTR records? >> > >> > Kurt >> > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to [email protected] > with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
