In Windows Vista, the TCP/IPv4 default gateway address is deleted when you use the Netsh command-line tool to configure the network interface IP address for the Dynamic Host Configuration Protocol (DHCP).

For example, you type the following command at a command prompt:

netsh interface ipv4 set address name=”Local Area Connection” source=dhcp

If you check the default gateway address by using the ipconfig command, you see that the IPv4 default gateway address is deleted.

Note: This problem occurs if the network interface has already configured by using DHCP.

• Windows Vista TCP Tweak
  If you just can’t leave your network stack well enough alone, here’s some ideas that may or may not speed things up.
  (tags: TCP Network )
• SecuGen Announces Microsoft Windows Vista Support for SecuDesktop(R) Pro Software
  If you do anything with biometrics, or more specifically, with fingerprint devices, then this announcement may interest you.
  (tags: Drivers Compatibility )

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If you just can’t leave your network stack well enough alone, here’s some ideas that may or may not speed things up. Keep reading →

On a computer that is running Windows Vista, you modify the TcpAckFrequency registry entry by following the steps that are described in Microsoft Knowledge Base article 328890. However, the behavior of TCP acknowledgments (ACKs) does not change.

Vista’s new TCP/IP stack offers plenty of improvements, but unfortunately doesn’t always play well with older hardware that isn’t aware of the newer features it uses. Steve Riley on Security mentions that this can be a problem when trying to use wireless networking with a router that doesn’t understand the updated ‘Windows Tuning’ feature. He suggests this is more common with routers used for public internet connections, such as at a hotel. The fix is to disable autotuning, which happens to be the same fix from tip 25 which dealt with threaded network applications. Keep reading →

After you enable both receive-side scaling and Internet Connection Sharing, TCP traffic stops. For example, the ping command does not work.

This problem occurs when this computer is running one of the following operating systems:

• Microsoft Windows Server 2003 with Service Pack 1 (SP1) and the Microsoft Windows Server 2003 Scalable Networking Pack installed
• Windows Vista

A nice little utility for showing what ports are in use, and by what. Keep reading →