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Broken TCP / Networkname not found / unvalid handle

DarkM
Hi there,

we have serveral problems when copying files through PPTP via SMB.
Router is ASG v8 VM on ESX5, Fileserver is Windows 2003 Server R2 VM ESX3, Clients are XP & W7:

After some time, every single copy task ends with errors like "Broken TCP" (Whireshark) / "Networkname not found (64)" / "Invalid handle", but the VPN itself never disconnects. The copied file may be different when it happens.

The problem is reducible to ASG, but I have no clue what to do. 
VM network interfaces are all "flexible", MTU is 1500. There is no QoS or IPS activated on ASG. There are no dropped packets coming from VPN clients nor internal hosts.

Overall performance over network is very poor when using PPTP. We see that bandwith changes regulary, literally in very regular intervalls, although no other copy process is involved.

Any ideas? Your help is really appreciated,

Kind regards,
Darkm


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  • 0 in reply to BAlfson
    Whenever unexpected things happen, look into the Intrusion Protection log file.  Anti-DoS activity also is logged there.

    Cheers - Bob


    Hey Bob,

    nothing in logfiles & IPS is turned off[:(]

    The whole thing drives me crazy - now we got all these errors like "Networkname not found" over the L2TP tunnel as well... 

    I can´t see that there is something else affected than filetransfer via SMB. Is there a firmwareupdate available which deals with such problems?

    Regards,
    DarkM