• NULL credentials might be used when accessing remote systems from a process running under Local System account

    Hi there, In a number of support cases, I was requested to take a look at "access denied" network traces. In some cases the reason of why we get the access denied is related to Kerberos authentication and Local system account so I wanted to touch this...
  • Do we support "Policy based routing" on Windows Server operating systems?

    Hi there, In one of the past cases, one of our customers wanted to know if we supported policy based routing on Windows 2003 or later OSes. First of all, it might be useful to clarify what "policy based routing" means in this context. Let's take the...
  • Is MaximumBlockSize registry key supported on Windows 2008 R2 RTM WDS server?

    Hi there, Recently I dealt with a connectivity issue that occurs when deploying OS images with Windows 2008 R2 WDS server to PXE clients running in different subnets. As you may already know, we have a workaround for router MTU size incompatibilities...
  • Why doesn't IPReassemblytimeout registry key take effect on Windows 2000 or later systems?

    Hi, I had to deal with a number of support cases where IPReassemblytimeout reg key was set but didn't take effect on Windows 2003 or a later system and I thought I should be sharing more information about this here. Here are some details: IP fragmentation...
  • Things that you may want to know about TCP Keepalives

    Hi, In this blog entry, I will be discussing TCP keepalive mechanism and will also provide some information about configuration options on Windows systems. a) Definition Let's first understand the mechanism. A TCP keep-alive packet is simply...