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 ...

In a situation in which you handle your own DNS services, create a reverse lookup zone on the DNS server. Depending on the software you run on the DNS server, it should be able to create a reverse ...

I may be wrong since it has been a little while but isnt a broadcast address x.x.x.254 and a subnet mask x.x.x.255? Click to expand... No. And that's only remotely valid on a /24 anyway. //EDIT: Geez, ...

Ever heard about the term “DNS” when using the Internet? DNS stands for Domain Name System. Before we go ahead and talk about what DNS is and how DNS lookup works, let us understand what the D in the ...

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 ...