1. Forum
  2. Usenet
  3. COMP.PROTOCOLS.DNS.BIND

  • [Non-DoD Source] Re: Dumb Question is an A or AAAA record required?

    From DeCaro, James John (Jim) CIV DISA F@21:1/5 to Mark Andrews on Thu Jul 9 13:16:05 2020
    To: @lbutlr ([email protected])
    Copy: [email protected] (bind-users)

    V291bGQgdGhlIGxhY2sgb2YgQSByZWNvcmRzIGFmZmVjdCBwb2ludGVyIHJlY29yZHM/ICBTZWVt cyBsaWtlIGl0IHdvdWxkLg0KDQoNCkppbQ0KDQoiSWYgeW91IGFsd2F5cyBkbyB3aGF0IHlvdSBh bHdheXMgZGlkIHlvdSB3aWxsIGFsd2F5cyBnZXQgd2hhdCB5b3UgYWx3YXlzIGdvdC4iDQoNCi0t LS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQpGcm9tOiBiaW5kLXVzZXJzIDxiaW5kLXVzZXJzLWJv dW5jZXNAbGlzdHMuaXNjLm9yZz4gT24gQmVoYWxmIE9mIE1hcmsgQW5kcmV3cw0KU2VudDogVGh1 cnNkYXksIEp1bHkgOSwgMjAyMCA4OjU2IEFNDQpUbzogQGxidXRsciA8a3JlbWVsc0BrcmVtZS5j b20+DQpDYzogYmluZC11c2VycyA8QmluZC11c2Vyc0BsaXN0cy5pc2Mub3JnPg0KU3ViamVjdDog W05vbi1Eb0QgU291cmNlXSBSZTogRHVtYiBRdWVzdGlvbiBpcyBhbiBBIG9yIEFBQUEgcmVjb3Jk IHJlcXVpcmVkPw0KDQpBbGwgYWN0aXZlIGxpbmtzIGNvbnRhaW5lZCBpbiB0aGlzIGVtYWlsIHdl cmUgZGlzYWJsZWQuICBQbGVhc2UgdmVyaWZ5IHRoZSBpZGVudGl0eSBvZiB0aGUgc2VuZGVyLCBh bmQgY29uZmlybSB0aGUgYXV0aGVudGljaXR5IG9mIGFsbCBsaW5rcyBjb250YWluZWQgd2l0aGlu IHRoZSBtZXNzYWdlIHByaW9yIHRvIGNvcHlpbmcgYW5kIHBhc3RpbmcgdGhlIGFkZHJlc3MgdG8g YSBXZWIgYnJvd3Nlci4gIA0KDQoNCg0KDQotLS0tDQoNCkF0IHRoaXMgc3RhZ2Ugb25lIHN0aWxs IG5lZWRzIEEgcmVjb3JkcyB0byBiZSByZWFjaGFibGUgYnkgZXZlcnlvbmUuICBPbmUgc2hvdWxk IGFsc28gZW5zdXJlIHlvdSBhcmUgcmVhY2hhYmxlIG92ZXIgSVB2NiBhcyBsb3RzIG9mIHRoZSB3 b3JsZCBiZWhpbmQgSVB2NiBvbmx5IGxpbmtzIGFzIHRoZWlyIElTUHMgZG9u4oCZdCBoYXZlIGVu b3VnaCBJUHY0IGFkZHJlc3NlcyBmb3IgZXZlcnkgb25lLiAgSW5zdGVhZCB0aGV5IGhhdmUgdG8g dXNlIHNvbWUgZm9ybSBvZiBJUHY0IGFzIGEgc2VydmljZSB3aGljaCBpcyBzaWduaWZpY2FudGx5 IG1vcmUgZXhwZW5zaXZlIHRvIG9wZXJhdGUgY29tcGFyZWQgdG8gc3RyYWlnaHQgcm91dGVycy4g DQoNCi0tIA0KTWFyayBBbmRyZXdzDQoNCj4gT24gOSBKdWwgMjAyMCwgYXQgMjI6MjIsIEBsYnV0 bHIgPGtyZW1lbHNAa3JlbWUuY29tPiB3cm90ZToNCj4gDQo+IO+7v0dpdmVuIGEgZG9tYWluIHRo YXQgaXMgaG9zdGVkIGFuZCB1c2VkIGZvciBlbWFpbCBhbmQgd2ViLCBpcyBhbiBBIHJlY29yZCBm b3IgdGhhdCBkb21haW4gYWN0dWFsbHkgcmVxdWlyZWQ/DQo+IA0KPiBUaGF0IGlzLCBpZiBib2Iu dGxkIGlzIGhvc3RlZCBieSBleGFtcGxlLmNvbSBjYW4geW91IHNpbXBseSBoYXZlDQo+IA0KPiAg ICBOUyBuczEuZXhhbXBsZS5jb20NCj4gICAgTlMgbnMyLmV4YW1wbGUuY29tDQo+ICAgIE1YIG14 LmV4YW1wbGUuY29tDQo+IA0KPiB3d3cgICAgQ05BTUUgQ2F1dGlvbi13d3cuZXhhbXBsZS5jb20N Cj4gDQo+IFdpdGhvdXQgc3BlY2lmeWluZyANCj4gDQo+ICAgIEEgMTEuMjIuMzMuNDQ0DQo+IA0K PiAoSSBhbSBwcmV0dHkgc3VyZSB0aGlzIGlzICp0ZWNobmljYWxseSogYWxsb3dlZCwgYnV0IGlz IGl0IHJlYWxseSBPSyB0byBkbyBvciBhcmUgdGhlcmUgcmVhc29ucyBub3QgdG8gZG8gdGhpcz8p DQo+IA0KPiANCj4gDQo+IC0tIA0KPiBBbmQgdGhlcmUgd2VyZSBhbGwgdGhlIHN0YXJzLCBsb29r aW5nIHJlbWFya2FibHkgbGlrZSBwb3dlcmVkDQo+ICAgIGRpYW1vbmRzIHNwaWxsZWQgb24gYmxh Y2sgdmVsdmV0LCB0aGUgc3RhcnMgdGhhdCBsdXJlZCBhbmQNCj4gICAgdWx0aW1hdGVseSBjYWxs ZWQgdGhlIGJvbGRlc3QgdG93YXJkcyB0aGVt4oCmDQo+IA0KPiBfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXw0KPiBQbGVhc2UgdmlzaXQgQ2F1dGlvbi1odHRw czovL2xpc3RzLmlzYy5vcmcvbWFpbG1hbi9saXN0aW5mby9iaW5kLXVzZXJzIHRvIHVuc3Vic2Ny aWJlIGZyb20gdGhpcyBsaXN0DQo+IA0KPiBJU0MgZnVuZHMgdGhlIGRldmVsb3BtZW50IG9mIHRo aXMgc29mdHdhcmUgd2l0aCBwYWlkIHN1cHBvcnQgc3Vic2NyaXB0aW9ucy4gQ29udGFjdCB1cyBh dCBDYXV0aW9uLWh0dHBzOi8vd3d3LmlzYy5vcmcvY29udGFjdC8gZm9yIG1vcmUgaW5mb3JtYXRp b24uDQo+IA0KPiANCj4gYmluZC11c2VycyBtYWlsaW5nIGxpc3QNCj4gYmluZC11c2Vyc0BsaXN0 cy5pc2Mub3JnDQo+IENhdXRpb24taHR0cHM6Ly9saXN0cy5pc2Mub3JnL21haWxtYW4vbGlzdGlu Zm8vYmluZC11c2Vycw0KDQpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXw0KUGxlYXNlIHZpc2l0IENhdXRpb24taHR0cHM6Ly9saXN0cy5pc2Mub3JnL21haWxt YW4vbGlzdGluZm8vYmluZC11c2VycyB0byB1bnN1YnNjcmliZSBmcm9tIHRoaXMgbGlzdA0KDQpJ U0MgZnVuZHMgdGhlIGRldmVsb3BtZW50IG9mIHRoaXMgc29mdHdhcmUgd2l0aCBwYWlkIHN1cHBv cnQgc3Vic2NyaXB0aW9ucy4gQ29udGFjdCB1cyBhdCBDYXV0aW9uLWh0dHBzOi8vd3d3LmlzYy5v cmcvY29udGFjdC8gZm9yIG1vcmUgaW5mb3JtYXRpb24uDQoNCg0KYmluZC11c2VycyBtYWlsaW5n IGxpc3QNCmJpbmQtdXNlcnNAbGlzdHMuaXNjLm9yZw0KQ2F1dGlvbi1odHRwczovL2xpc3RzLmlz Yy5vcmcvbWFpbG1hbi9saXN0aW5mby9iaW5kLXVzZXJzDQo=

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Matus UHLAR - fantomas@21:1/5 to All on Thu Jul 9 15:43:18 2020
    On 09.07.20 13:16, DeCaro, James John (Jim) CIV DISA FE (USA) via bind-users wrote:
    Would the lack of A records affect pointer records? Seems like it would.

    pointer records are independent on A/CNAME records and irelevant in thie
    case.

    -----Original Message-----
    From: bind-users <[email protected]> On Behalf Of Mark Andrews >Sent: Thursday, July 9, 2020 8:56 AM
    To: @lbutlr <[email protected]>
    Cc: bind-users <[email protected]>
    Subject: [Non-DoD Source] Re: Dumb Question is an A or AAAA record required?

    At this stage one still needs A records to be reachable by everyone. One should also ensure you are reachable over IPv6 as lots of the world behind IPv6 only links as their ISPs don’t have enough IPv4 addresses for every one. Instead they have to
    use some form of IPv4 as a service which is significantly more expensive to operate compared to straight routers.


    On 9 Jul 2020, at 22:22, @lbutlr <[email protected]> wrote:

    Given a domain that is hosted and used for email and web, is an A record for that domain actually required?

    That is, if bob.tld is hosted by example.com can you simply have

    NS ns1.example.com
    NS ns2.example.com
    MX mx.example.com

    www CNAME Caution-www.example.com

    Without specifying

    A 11.22.33.444

    (I am pretty sure this is *technically* allowed, but is it really OK to do or are there reasons not to do this?)

    --
    Matus UHLAR - fantomas, [email protected] ; http://www.fantomas.sk/
    Warning: I wish NOT to receive e-mail advertising to this address.
    Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
    Quantum mechanics: The dreams stuff is made of.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)