What Controls Reverse DNS lookup on Your server?

Probably something out of our control.

[blend27]

What do people'z use to determine RDNS on Windows hosts currently to get a proper RDNS?

Reason I am asking I am running every IP on several sites thru a Java/ColdFusion Script Look up:

rdns = structNew();
rdnsTimeStart = now();
iaclass="";
addr="";
iaclass=CreateObject('java', 'java.net.InetAddress');
addr=iaclass.getByName(arguments.ipaddress);
rdns.string = addr.getCanonicalHostName();
rdns.timeTaken = DateDiff('s', now(), rdnsTimeStart);

Lately lots of Bing IPs keep coming up as empties, thus getting Nuked cause no "matching RDNS"

---to add to this, doing a simple NSLOOKUP via CMD returns a proper value.

[keyplyr]

I stopped using those scripts. IMO it burdens the server speed. I look stuff up manually (I call Manual.)

I use unix (apache) not windows, so because of native set-up, all I have to do is to use a domain name in regex and rDNS triggers. Still IMO the server response time is affected. This is especially significant in the mobile world, where so many ISPs and others (e.g. Google) will attempt to serve a watered-down version of a site if the response time is slow. If you've ever seen your site like this, you'd reach for the defibrillator

[blend27]

Not a Goog question though. Goog is OK, not that I care on these sites.

Part of a logic that blocks/allows IPs by RDNS.

IIS 7.5+, 3+seconds for a lookup in some instances that are a few milliseconds via NSlookup, I don't have access to it real time(dll via .NET/c# - shared host - security).

[keyplyr]

I'm referencing Google's weblight and transcoder, not the search ranking. Google is just one example though. Because of mobile, dozens of networks now alter a site if it is slow.

Yes, you will never know how fast your site loads across networks around the world. That's my point. IMO there is no need to burden the server with this.

There are multiple issues with automatic look-ups anyway, as you've witnessed. They return false output a lot of the time. Been there, seen it. Not to mention the added 2 way remote DNS connection.

[blend27]

I am not referencing Google's weblight and/or transcoder.

I am asking about an alternative to technology that I use(Java) that is used to pull RDNS.

[bhukkel]

I use PHP with the net_dns2 class

[blend27]

hmm, I will give it a try. Thanks!

The sites I am speaking of are hoheypots pretty much. Bunch of "OPEN" forums I have set up a few years ago.