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General Topics

Barracuda Central Reputation Block List

Summary Status: Active Terms: Free by request Zones: 1 Website: Lookup: Removal: Contact: Background The Barracuda Reputation Block List, also known as The BRBL, has been in public deployment since 2008. Barracuda Networks is a manufacturer of a hardware anti-spam appliances. Reports have been made that The BRBL is highly accurate,…

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Backscatterer List

Summary Status: Active Terms: Free Zones: 1 Website: Lookup: Removal: Contact: Background, working in cooperation with is different than most DNS based blacklists. does not maintain a list of IP addresses that have been seen spamming, sending email to honeypots, spamtraps, or any of the other general tactics…

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APEWS List Details

Summary Status: Active Terms: Free Zones: 2 Website: Lookup FAQ: Background Most spam advisory and blocking systems work after the fact. There is a time lag between the spammer setting up shop, spamming millions, and getting netblocks listed by these systems. APEWS identifies known spammers and spam operations, listing them as soon…

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The Abusive Hosts Blocking List Details

Summary Status: Offline as of late 2014 Terms: Free Zones: 1 Website: Lookup or Removal: FAQ: Contact: Background, otherwise known as The Abusive Hosts Blocking List is a DNS based blacklist. The AHBL started in 2003, and is a division of the Summit Open Source Development Group. According to The…

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VPN Protocols Explained

VPN Protocols Explained In Plain Language

You don’t have to worry about VPN protocols if you’re researching VPNs for basic safety and security. The default protocol should work perfectly fine for you.

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VPN Savings

Limited Time VPN Deal Updated August 27, 2019 Get Extra Security, More Privacy and Greater Access Online Grab savings on a Virtual Private Network: Extra Security to keep hackers away while you’re online Extra Privacy to prevent your ISP and advertisers from tracking you Greater Access to look for better prices and bypass website blocks…

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How does geolocation work?

Geolocation Database Providers

There are a variety of geolocation database providers for determining a user’s location. Geolocation Fields ComparisonGeolocation Accuracy Comparison IP2Location IP2LocationTM is a geo IP solution to help you to identify visitor’s geographical location, i.e. country, region, city, latitude, longitude, ZIP code, time zone, connection speed, ISP and domain name, IDD country code, area code, weather…

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The goal of a DNS Blacklist is to prevent spam.

What is a DNSBL?

Domain Name System Blacklists, also known as DNSBL’s or DNS Blacklists, are spam blocking lists. They allow a website administrator to block messages from specific systems that have a history of sending spam. These lists are based on the Internet’s Domain Name System, or DNS. It converts numerical IP addresses such as into domain…

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