Does this IP have reverse DNS?

2013-03-04 Thread Blake Hudson
Just hoping to get a consensus on this. Postfix is stating that a host (in fact several hosts from the same ISP) does not have rDNS, because our DNS (Bind 9.8) returns SERVFAIL when looking up a PTR record for it. The IP in question is 63.171.0.212. From my perspective, this IP does not have a

Re: Does this IP have reverse DNS?

2013-03-04 Thread Robert Moskowitz
On 03/04/2013 01:06 PM, Blake Hudson wrote: Just hoping to get a consensus on this. Postfix is stating that a host (in fact several hosts from the same ISP) does not have rDNS, because our DNS (Bind 9.8) returns SERVFAIL when looking up a PTR record for it. The IP in question is

Re: Does this IP have reverse DNS?

2013-03-04 Thread KSB
On 2013.03.04. 20:06, Blake Hudson wrote: Just hoping to get a consensus on this. Postfix is stating that a host (in fact several hosts from the same ISP) does not have rDNS, because our DNS (Bind 9.8) returns SERVFAIL when looking up a PTR record for it. The IP in question is 63.171.0.212. From

Re: Does this IP have reverse DNS?

2013-03-04 Thread John Peach
On Mon, 04 Mar 2013 12:06:20 -0600 Blake Hudson bl...@ispn.net wrote: Just hoping to get a consensus on this. Postfix is stating that a host (in fact several hosts from the same ISP) does not have rDNS, because our DNS (Bind 9.8) returns SERVFAIL when looking up a PTR record for it. The IP in

Re: Does this IP have reverse DNS?

2013-03-04 Thread Blake Hudson
KSB wrote the following on 3/4/2013 12:13 PM: On 2013.03.04. 20:06, Blake Hudson wrote: Just hoping to get a consensus on this. Postfix is stating that a host (in fact several hosts from the same ISP) does not have rDNS, because our DNS (Bind 9.8) returns SERVFAIL when looking up a PTR record

Re: Does this IP have reverse DNS?

2013-03-04 Thread Robert Schetterer
Am 04.03.2013 19:31, schrieb Blake Hudson: OK, so we ask for a PTR on 212.0.171.63.in-addr.arpa and instead receive a CNAME (with additional). Did anyone notice that the CNAME does not resolve? yeah ,my dns cache didnt resolved it had to be reloaded Best Regards MfG Robert Schetterer --

Re: Does this IP have reverse DNS?

2013-03-04 Thread Pau Amma
On Mon, March 4, 2013 6:31 pm, Blake Hudson wrote: OK, so we ask for a PTR on 212.0.171.63.in-addr.arpa and instead receive a CNAME (with additional). Did anyone notice that the CNAME does not resolve? Does for me. *shrug* $ dig +noall +question +answer -x 63.171.0.212

Re: Does this IP have reverse DNS?

2013-03-04 Thread Blake Hudson
Pau Amma wrote the following on 3/4/2013 12:40 PM: On Mon, March 4, 2013 6:31 pm, Blake Hudson wrote: OK, so we ask for a PTR on 212.0.171.63.in-addr.arpa and instead receive a CNAME (with additional). Did anyone notice that the CNAME does not resolve? Does for me. *shrug* $ dig +noall

Re: Does this IP have reverse DNS?

2013-03-04 Thread Blake Hudson
Robert Schetterer wrote the following on 3/4/2013 12:37 PM: Am 04.03.2013 19:31, schrieb Blake Hudson: OK, so we ask for a PTR on 212.0.171.63.in-addr.arpa and instead receive a CNAME (with additional). Did anyone notice that the CNAME does not resolve? yeah ,my dns cache didnt resolved it

Re: Does this IP have reverse DNS?

2013-03-04 Thread /dev/rob0
On Mon, Mar 04, 2013 at 12:31:08PM -0600, Blake Hudson wrote: KSB wrote the following on 3/4/2013 12:13 PM: On 2013.03.04. 20:06, Blake Hudson wrote: Just hoping to get a consensus on this. Postfix is stating that a host (in fact several hosts from the same ISP) does not have rDNS, because

Re: Does this IP have reverse DNS?

2013-03-04 Thread Reindl Harald
Am 04.03.2013 19:06, schrieb Blake Hudson: Just hoping to get a consensus on this. Postfix is stating that a host (in fact several hosts from the same ISP) does not have rDNS, because our DNS (Bind 9.8) returns SERVFAIL when looking up a PTR record for it. The IP in question is

Re: Does this IP have reverse DNS?

2013-03-04 Thread Robert Schetterer
Am 04.03.2013 19:46, schrieb Blake Hudson: Robert Schetterer wrote the following on 3/4/2013 12:37 PM: Am 04.03.2013 19:31, schrieb Blake Hudson: OK, so we ask for a PTR on 212.0.171.63.in-addr.arpa and instead receive a CNAME (with additional). Did anyone notice that the CNAME does not

Re: Does this IP have reverse DNS?

2013-03-04 Thread Blake Hudson
/dev/rob0 wrote the following on 3/4/2013 12:56 PM: On Mon, Mar 04, 2013 at 12:31:08PM -0600, Blake Hudson wrote: KSB wrote the following on 3/4/2013 12:13 PM: On 2013.03.04. 20:06, Blake Hudson wrote: Just hoping to get a consensus on this. Postfix is stating that a host (in fact several

Re: Does this IP have reverse DNS?

2013-03-04 Thread /dev/rob0
On Mon, Mar 04, 2013 at 01:22:39PM -0600, Blake Hudson wrote: I still am unsure if it's valid to ask for a PTR record and receive a CNAME in return. If it is, I assume that CNAME needs to lead to a valid PTR record at some point. The way it works: when you query for any type and get a CNAME,

Re: Does this IP have reverse DNS?

2013-03-04 Thread Blake Hudson
Robert Schetterer wrote the following on 3/4/2013 1:08 PM: Am 04.03.2013 19:46, schrieb Blake Hudson: Robert Schetterer wrote the following on 3/4/2013 12:37 PM: Am 04.03.2013 19:31, schrieb Blake Hudson: OK, so we ask for a PTR on 212.0.171.63.in-addr.arpa and instead receive a CNAME (with

Re: Does this IP have reverse DNS?

2013-03-04 Thread Bill Cole
On 4 Mar 2013, at 14:22, Blake Hudson wrote: Maybe I am complacent in my expectation that I can ask for an A record and receive a CNAME in return, but what else would/could one expect - isn't this the behavior of CNAMEs? No. A CNAME record provides the canonical name that should be used