DNSreport - Generate a DNS Report for your domain. A large percentage of domains have DNS problems which can lead to severe issues in a search engine marketing campaign. This site will help you find DNS problems and fix them.
"On 2008 July 08, Tuesday, technology vendors from across the industry will simultaneously release patches for their products to close a major vulnerability in the underpinnings of the Internet. While most home users will be automatically updated, it's important for all businesses to immediately update their networks.
This is the largest synchronized security update in the history of the Internet, and is the result of hard work and dedication across dozens of organizations."
"An attacker with the ability to conduct a successful cache poisoning attack can cause a nameserver's clients to contact the incorrect, and possibly malicious, hosts for particular services. Consequently, web traffic, email, and other important network data can be redirected to systems under the attacker's control."
Further Discussion at WebmasterWorld...
Shows info about an IP, including city and country
Traces the route packets take to this host.
Is an Email address a known free one?
Deobfuscates confusing URIs
Converts a decimal IP (e.g. 2130706433) into an IP.