Reverse DNS is a site that displays reverse lookup results for approximately 4.3 billion IPv4 addresses in a map-like manner. This is what it looks like when you access the site. I can't tell what it ...
How does anyone in IT who works with either email or DNS not know how reverse DNS lookups work? Even worse yet not know what a reverse DNS lookup even is. It boggles my mind when I have to explain ...
Over the past few days, we have found that several ISPs put us on some type of block list that didn’t allow our mail through. … One told us that the only way it would allow the mail through would be ...
Last week we began to discuss the records that DNS servers use to describe their view of the name space they are responsible for. We didn’t get beyond the Start of Authority (SOA) record, but as that ...
A year ago, Microsoft promised to enable Webmasters a method of verifying MSNbot. Way too often, rogue spiders mask themselves as official spiders from Google, Yahoo, Live Search or Ask.com. The ...
Google has confirmed that there are some GoogleBot useragent spiders not properly passing verification protocol. Savvy webmasters noticed that GoogleBot over the .249.70.0 /24 IP range was not ...
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