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  • Blog Post: Where do resets come from? (No, the stork does not bring them.)

    In Networking Support we often get calls from customers, as well as other groups within Technical Support, where someone has seen a TCP Reset frame in a network capture and they want to know "what's wrong with the network?". Well, there isn't necessarily anything "wrong" just because...
  • Blog Post: New Networking-related articles for the week of October 10 – October 16

    The drought appears to be over! I have quite a number of new networking-related articles to share with you this week: 2248145 IPsec connection in the IKEv1 tunnel mode fails from a computer that is running Windows 7 or Windows Server 2008 R2 2353808 The WINS replication operation fails on a failover...
  • Blog Post: How TCP TIME-WAIT Assassination works

    Can a port be re-used before TIME-WAIT expires? In a TCP conversation, the communicating peers use port numbers to communicate with each other. The way they uniquely identify the sessions is with a four tuple (Source IP address, Source Port, Destination IP address, Destination Port). The four tuple represents...
  • Blog Post: New Networking-related KB articles since May 8

    I’d like to apologize for not having any new KB articles to post for the past several weeks; some changes have been going on with the tools I use to find this information. Here are the most recent networking-related KB articles since my last entry on May 13th. I apologize in advance for any duplicates...
  • Blog Post: TCP DupACKs and TCP Fast Retransmits

    Hello all, my name is Mehul and I am with Platforms Networking support. We receive many calls dealing with slow file transfer when copying files using TCP (such as SMB file copying or FTP file transfer). The recommended approach to troubleshoot these scenarios is to take Network Monitor traces at the...
  • Blog Post: New Networking-related articles for the week of May 15 – May 21

    I have three new networking-related articles to share with you this week: 2533454 Resolving Internet connectivity issues on World IPv6 Day (June 8, 2011) 2550576 STOP 0xC4 may occur in tcpipreg.sys following a reboot after Driver Verifier is enabled on Windows 7 SP1 or Windows Server 2008 R2 SP1 2551021...
  • Blog Post: New Networking-related KB articles for the week of May 2 – May 8

    We have a couple of new networking-related Knowledge Base articles to share this week: 979230 TCP connections fail intermittently when both endpoints are on the same computer in Windows Server 2003 SP2 978309 IPv6 transition technologies, such as ISATAP, 6to4 and Teredo do not work on a computer that...
  • Blog Post: New Networking-related articles for the week of June 12 – June 18

    Quite a variety of new articles were released this week, covering a number of networking technologies and operating system versions: 2523887 You may encounter file corruption issues when you use the Offline Files feature to synchronize data in Windows 7 2525835 MS11-047: Vulnerability in Microsoft Hyper...
  • Blog Post: New Networking-related KB articles for the week of February 7 – February 13

    We have had a couple of lean weeks recently with very few new KB articles to report, but that is certainly not the case this time around! Here are the latest networking-related KB articles: 979554 The creator of an SNMP trap notification cannot be identified in Windows Server 2003 978972 Stop error message...