PHP 5.2+ offer an excellent function for validating IP Addresses: filter_var().
The filter_var() function offers several flags: FILTER_VALIDATE_IP, FILTER_FLAG_IPV4, FILTER_FLAG_IPV6, FILTER_FLAG_NO_PRIV_RANGE and FILTER_FLAG_NO_RES_RANGE, used to filter or validate IP addresses based on whether the address is IPv4, IPv6 or within a reserved or private network range.
Country IP Blocks has introduced Access Control Lists by Continent to allow additional options for network managers and webmasters.
Our Continent Access Control Lists are located on our continents page.
Listed continents include Africa, Antartica, Asia, Europe, North America, Oceania and South America.
A complete list of countries by continent is available here.
Breaking News: We are pleased to announce that you may now select your Country IP Blocks by continent as well as by country.
We have received many requests from Network Managers and Webmasters for additional features on our Access Control Lists. One of the most requested feature is the ability to consolidate our Country IP lists by continent. Read more…
Tip #1
Be Paranoid About Password Policies
Every website, computer user and business must develop and enforce strong password policies. Proper password procedures may not alleviate your paranoia but it will help you sleep at nights.
Use totally random passwords.
Let’s face it, many people use low-tech, easy to remember and easy to guess passwords. Some of the most common are Read more…
Tip #2
Be Paranoid About User Input
One of the most security vulnerable areas of the web today is user forms. Websites use forms for all sorts of purposes. Whether you use forms to take orders, receive contact information or allow comments on your blogs or message boards, you need to start with one unbreakable rule: Read more…