Category: Internet Networking

Hidden IPv6 on XP and Server 2003
article #431, updated 1877 days ago

Sometimes IPv6 is installed on XP in a hidden form — sometimes IPv6 may be installed, but not visible in any Windows GUI. To find out, go to command prompt and enter:

netsh show helper

If IPv6 is installed, in that list will be “ipv6”. To uninstall on XP, run this:

ipv6 uninstall

The ipv6 command does not exist on Server 2003. The following does:

netsh delete ipv6mon.dll

Hidden IPv6 has been shown to cause problems in some Oracle environments.

Categories:   LAN Networking   Internet Networking


Web/GUI front ends for BIND
article #287, updated 2246 days ago

Here is an interesting list:

But the best may be here:

Categories:   DNS   Internet Networking


A Unique Private IPv6 Subnet for Your LAN
article #263, updated 2311 days ago

IPv4 has the 192.168.*.*, 172.16-31.*, and 10.*.*.* ranges; IPv6 has one range that is enormously bigger than all of those three put together, which can contain 1,329,227,995,784,915,872,903,807,060,280,344,573 devices. The standard is to use a subnet randomly chosen, to minimize conflict when creating VPNs et cetera. The best tool I know for IPv6 subnet generation, is here:

You will need to tell Windows the size of your subnet. The default size is 64 on Windows, but this is quite enormous; a size of 16 is more than sufficient for a current LAN. Here is Windows configured for a IPv6 static with a 16-bit subnet, without v6 DNS as of yet:


Categories:   LAN Networking   Internet Networking


JEB's Diagnostic Sites
article #164, updated 2562 days ago

Here are web sites for diagnosing DNS, Internet email, and other issues.

A very good place to test Internet email servers and servers in general exposed to the Internet at large.

DNSstuff is excellent for diagnosing DNS issues of all kinds.  Most of its tools require a small subscription fee. is very good for obtaining geographical and ISP information for an IP address.

is very good for testing Exchange WAN services, e.g., smartphone access, Outlook Anywhere.

Categories:   Internet Networking   Tools


Example FTP batch (.CMD) script
article #153, updated 2616 days ago

A very good example is on this page:

Categories:   Internet Networking   Scripting


Private IPv6 Address Range Generator
article #125, updated 2702 days ago

Here is an automatic generator of IPv6 private address ranges:

Categories:   Internet Networking   LAN Networking


Enable Remote Desktop (RDP) Remotely
article #118, updated 2749 days ago

As long as you have an administrative password for the domain, this works:

Categories:   Internet Networking   LAN Networking


nVidia causing RDP to lock up
article #114, updated 2762 days ago

The noteworthy Liz Landry contributes:

Just wanted to let you know that I found out this morning that the newer Nvidia drivers are having problems with Remote Desktop and causing the computer to lock up and have to be hard booted.  The fix is as follows:

HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management

Add a DWORD and call it:


Set it to hex size 20.

Then reboot and use RDP.  There should no longer be problems with the computer locking up.

Categories:   Hardware   Internet Networking


FTP Server
article #64, updated 3192 days ago

The best FTP server software for Windows right now, is very probably zFTPServer:

It has all the features of FileZilla, but works well under Server 2008, which FileZilla does not. It is free of charge, but there are for-pay additional modules, including a Windows authentication module which looks very interesting indeed.

Categories:   Internet Networking   LAN Networking


Enable RDP remotely
article #61, updated 3206 days ago

There is a free tool to enable RDP remotely!

Categories:   Internet Networking   LAN Networking