Disable IP Source Routing in Windows Server 2008 & Windows Vista

 Networking, Security, Windows Server 2008, Windows Vista  No Responses »
Sep 282008
 

IP Soure routing is an option which allows the source of a packet to specify the path that the packet will take, and what path return packets sent back to the source will take. Source routing is useful when the default route that a connection will take fails or is suboptimal for some reason, or for network diagnostic purposes. However, even more is a menace as poses a severe security issue where malicous users can exploit this feature to cause DoS attacks or even bypass LAN security rules in place.

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Disable Media Sensing on Ethernet adapters in Windows

 Networking  2 Responses »
Aug 212008
 


The Media Sensing feature in Windows 2000, Windows XP and later is used to detect whether the network media are in a link state. With Media Sense feature,  Windows senses a link state as UP or DOWN based on the link availability. When Windows detects a “down” state, it removes the bound protocols from that adapter until it is detected as “up” again.

Media Sensing feature is enabled by default in Windows except Windows Server 2003. However, in instances where you do not want Windows to sense link status (very unlikely) in which case, you can disable the Media Sensing feature from Windows Registry.

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Change Default Time TO Live (TTL) in Windows Server 2008 & Windwos Vista

 Networking, Windows Server 2008, Windows Vista  1 Response »
Aug 172008
 


The Time To Live (TTL) value in an IPv4 packet determines the maximum number of links or hops on which an IPv4 packet is allowed to travel before being discarded. The default TTL value in Windows Server 2008 and Windows Vista is set to 128. While the defaults are good enough and may never need changing, there may be instances where you may want to change the default TTL.
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Set Gratuitous ARP requests in Windows Server 2008 and Windows Vista

 Networking, Windows Server 2008, Windows Vista  No Responses »
Aug 172008
 


Gratuitous ARP is a feature of Address Resolution Protocol in which a Gratuitous ARP request is sent by a host for its own IP Address while initiliazing.  Gratuitous ARP requests are sent to ensure that the IPv4 address is not already in use on the locally attached subnet.

In Windows 2008 & Windows Vista, we can control the number of Gratuitous ARP requests sent and is set to “3″ by default. To modify the number of Gratuitous ARP entries sent (between 0 and 3)

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Prepare this Disk error in Windows Vista after installing VMWare

 Multimedia  2 Responses »
Jun 222008
 

After installing VMWare, Windows Vista will recognize CDs and DVDs as blank Discs on your CD-ROM, CD-RW, DVD drives. When you try to access from “Computer”, it will pop the message

“Prepare this Blank Disk”

VMWare prompts to disable Auto-Run in Windows Vista to avoid performance and application issues during installation. If accepted, VMWare disables “Autorun” and thereon you face with this problem.

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