NT Kernel Resources provides high quality toolkits, white papers and end-user application software for network packet filtering, network security and operating systems analyses. Visit out Products page if you are looking for:

• NT/2000/XP/2003 universal software bus analyzer for capturing device I/O (Device Filter)
• Stateful firewall software for Windows 2000/XP/2003/Vista/2008/7/2008R2 (NeT Firewall).
• Library to implement your own firewall, NAT, PAT, IP shaper, network bridge, traffic count & monitoring tools. Our premium and widely used Windows Packet Filter Kit (WinpkFilter) allows you to implement all of these and many other packet filtering/modifying applications completely in user-mode or just prototype in user mode and then move into kernel at the final stage.
• Library to implement virtual disks (Virtual Disk SDK)
• Local system network sniffer which allows you to view and analyze local system traffic including localhost (127.xxx.xxx.xxx) address space (Local Network Monitor) with open API interface (Local Network Monitor API).
• Some simple but sometimes useful free utilities (SysView, MergeStreams, Ethernet Bridge, Internet Gateway, VirtNet, LAN HTTP Monitor).

In the Links section of this site we've collected some interesting links to web resources relative to kernel development, firewall development, windows networking, security and etc. If you have not found something on our pages you have a good chance to find it there.

In the White Papers section we are collecting articles, reviews, docs and faqs you may find useful. Among others there is "Firewall for Windows" - a nice overview of possible approaches of network packet filtering for Windows operating systems family.

We also support the web based discussion board. There are Windows Internals and NT Kernel Resources products support forums. We believe you have a good chance for professional answers there.

Vadim Smirnov
NT Kernel Resources
vadim@ntkernel.com