nanog mailing list archives

Re: Google PTR?


From: Christopher Morrow <morrowc.lists () gmail com>
Date: Sat, 27 Oct 2012 14:28:27 -0400

On Sat, Oct 27, 2012 at 7:05 AM, Anurag Bhatia <me () anuragbhatia com> wrote:
Hi Blair


I guess that's pretty much because they don't really wish to put any info
related to routers in public including location & circuit bandwidth which is
often given major networks in PTR.


more over, what help is it? I'm of two minds really about this:
 1) it's handy to say: the router in elbonia is being 'bad'
 2) it's just as simple to say: 'your router with interface ip 1.2.3.4
is being bad'
     (or: "everything through 1.2.3.4 is forked... plstofixkthxbi!")

It's often cited as a headache to maintain the PTRs (not really,
automation ftw!) I think really it gets down to "how does it really
help?"

Btw I guess you must be troubleshooting some routing issue. My experience
has been decent with them in past. They are usually responsive on the email
addresses mentioned in peering db for AS15169.

also folk watch this list (and others)...though certainly the proper
contact method is that which is in peeringdb.

http://www.peeringdb.com/view.php?asn=15169





On Sat, Oct 27, 2012 at 12:18 PM, Christopher Morrow
<morrowc.lists () gmail com> wrote:

On Fri, Oct 26, 2012 at 11:52 PM, nanog <nanog () afxr net> wrote:
On 10/26/2012 7:13 PM, Blair Trosper wrote:

I'm sure I'm bringing up a topic that's been brought up before, but I
figured I'd have a go.

Anyone from Google around that could answer to why there is no reverse
DNS/PTR with most Google IP addresses (from traceroute, etc)?

Alternatively, is there a server that can be utilized by the net
operators
community to at least get an answer on some of the IPs?

It's very frustrating to contend with no PTR records in traces for
troubleshooting and the like.

Any information (off list or on) would be greatly appreciated.

Thanks,
Blair Trosper
Updraft Networks & North Texas GigaPOP

Which particular address are you referring to?
I get PTR responses for the limited set of address I get from google.

examples are good... I suspect he means things inside 15169's network
that are not serving external people services: 209.85.243.114

for instance?




--

Anurag Bhatia
anuragbhatia.com

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