Closing network connection VB 3.0.0-2

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I have last release of Kubuntu 9.4 on Windows XP SP3. In VB i use Intel desktop NIC. Usually after higher network traffic on hosted OS the network connection on guested OS (Kubuntu) has been unstable. I have about 10 ssh connection to remote system and randomly the connection are closed with:

Read from remote host XXX: Connection reset by peer Connection to XXX closed.

If i go back to version VB 2.2.4 i don't have this problem.

[misha]

What connection type do you use with your VM? i.e. bridged, NAT, etc.?

[[email protected]]

I use NAT, no port forwarding.

[vasily Levchenko]

Could you please attach the log? Have you problems started from 3.0.0 or 3.0.2?

[[email protected]]

Log from 3.0.2

[[email protected]]

I have this problem from 3.0.0.

[[email protected]]

Log from 3.0.2 with VT-x enabled

[vasily Levchenko]

What do you mean by "after higher network traffic", i need this information for easier reproducing the problem?

[[email protected]]

I download/upload file over ftp. File has about 600 MB and speed about 4Mb/sec. After this step i have been sure that ssh connection are disconnected or will be disconnected in near following minutes. Also new created ssh connection is closed after few minutes.

[vasily Levchenko]

Replying to kraki:

I download/upload file over ftp. File has about 600 MB and speed about 4Mb/sec. After this step i have been sure that ssh connection are disconnected or will be disconnected in near following minutes. Also new created ssh connection is closed after few minutes.

Thank you for information.

[Dixon]

I am experiencing spontaneous connection drops also since upgrading v224 to v302. Host XP Home, Guest XP Pro, NAT. Log file attached.

[Dixon]

Multiple connection drops over a two hour period.

[Zoltan Fekete]

I can also confirm that sometimes, the connection drop on the NAT interface. Usually the only way to get back to realiable network operation after this point is to shut down the guest and start it up again.

[vasily Levchenko]

Test build was sent for verification.

[vasily Levchenko]

duplicate of #4343