I am one of the developers of a website that lets people buy electronic phone cards. We are having real issues with people in the middle east buying multiple phone cards with a stolen phone card and ...

You've done the right thing by your organisation and made sure that DMARC and SPF (sender policy framework) records are set in an effort to reduce email spoofing, but all that good work could be ...

One of the sleuths at WebmasterWorld noticed that Microsoft updated the IP ranges for the spiders, or some of them, formerly known as MSNBot and now known as BingBot. The DNS for IP ranges 157.55 and ...

Every machine on the the Internet has a unique number assigned to it, called an IP address. Without a unique IP address on your machine, you will not be able to communicate with other devices, users, ...

While blocking IP ranges work perfectly, blocking a website or domain is tricky. That’s because there can be a multiple IP attached to the domain, and while you can prevent them, the DNS resolver can ...