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This website is the home of a few selfmade web applications using Asp.Net, HTML, CSS, and JavaScript.

DNSBL Lookup

At the company I work and also on the server this website is hosted we use SpamAssassin to filter our e-mail messages, In our SpamAssassin configuration we use a few specific DNS based email blacklists. To check ip adresses against our configered DNSBL's I crafted up a webbased application that reports if a submitted IP is listed or not listed in one of our used DNSBL's.

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GeoIP Lookup

Another little expermiment of mine, follow the link below and you'll find a Maxmind GeoIP database with Google Maps Mashup. The GeoIP city/country lookup tool performs real-time lookups for an IP to return you the geographical location of the specific IP. The GeoIP results may not be 100% accurate, but i am quite satisfied with the result.

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Sitemap Generator

Suitable when you need to quickly create a sitemap for a small web site (up to 500) pages. A sitemap enables you to quickly and easily notify search engines about all the pages in your website and any changes. This ensures they are indexed quickly and correctly. Crawl your website today and you get sitemaps ready immediately. Compatible with major search engines including Google, Bing, Baidu, Yandex and more.

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The Domain Name System (DNS) is a hierarchical decentralized naming system for computers, services, or other resources connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities. Most prominently, it translates more readily memorized domain names to the numerical IP addresses needed for locating and identifying computer services and devices with the underlying network protocols.

The most common types of records stored in the DNS database are for Start of Authority (SOA), IP addresses (A and AAAA), SMTP mail exchangers (MX), name servers (NS), pointers for reverse DNS lookups (PTR), and domain name aliases (CNAME).

The DNS lookups are done directly against the domain's authoritative name server, so changes to the DNS Records should show up instantly.

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CIDR to RegEx

The IPv4 Range Regular Expression Builder is a tool that converts IPv4 Addresses or CIDR IPv4 Ranges to regular expression for that IP (range). At the company I work and also on the server this website is hosted we use these for scripting hMailServer to allow specific hosts, with specific IP adresses to bypass hMailServer's greylisting mechanism (in OnHelo Event). Mail from various hosts like, and typically rotate servers when trying to deliver e-mails. This would normally not be a problem for greylisting except those services randomly attempt to deliver a single email from any of the mail servers in the pool. The first attempts comes from another server then the second attempt and the third might be attempted from first server again. This could cause a problem with greylisting because it is possible that none of the mail servers will be used more than a few times to try to deliver the email. Thus, none of the servers will get passed the greylisting mechanism.

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OA 2.x Validation

This is a online tool that enables you to validate OA 2.x SLIC tables and OEM Certificates. This tool will tell you if the uploaded files are valid, what OA version it is for, and if both OA 2.x binary SLIC table and OEM Certificate are uploaded if these match each other.

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OA 2.x SLICCreator

This is a online tool that enables you to create, customize and download valid OA 2.x SLIC tables required for Windows Vista, Windows 7, Windows Server 2008 w/ or w/o R2 and Windows Server 2012 w/ or w/o R2 to be able to benefit of the OEM activation technique.

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OEM:SLP Key Collection

This is a online OEM:SLP keys collection for Windows Vista, Windows 7, Windows Server 2008 w/or w/o R2 and Windows Server 2012 that can be used to be able to benefit of the OEM activation technique.

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Online PIDChecker

This is a online tool that enables you to check and validate Windows and Office Applications/Suites Product Keys. This online PIDChecker will provide you various infomation about supplied Product Key, such as the Windows edition what it is for, Product Key Type and much more.

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