New connections choked on high concurrent open connections

[halcyon]

I have the following problem.

When using any BT client (Bitcomet, Azureus, etc.) with a patched MS TCP/IP protocol stack (connection limit = 1000), I run into a following problem.

I cannot start any new tcp/ip connections.

While BT client remains working and downloading/uploading, I cannot open any web page, read any mail, read news (nntp) or do anything that creates a new network connection on my machine.

Clients that were already open and working (e.g. an irc client) before the system went into this starved condition, remain working ok.

Is this a known issue with LnS 2.5p2 (using latest lnsfw1.sys v3.0.0.4 and
lnsfw.sys v.4.0.0.7) ?

Is there a known fix (I haven't found any, tried searching)?

[halcyon]

This happens even if I limit my bandwidth and maximum tcp/Ip connections to less than half of available practical maximum.

When this starved condition happens, my networks remains fully working from other mahcines (hence it is not my router being choked for overall cpu load).

Also, disabling LnS cures this issue.

As such, I do believe this is related to LnS.

[nv 25]

hi!
i think the problem that you have described is related to the large number of simultaneous TCP connection when SPI enabled ( currently the maximum number has been set to 256 according to this thread: http://www.wilderssecurity.com/showthread.php?t=68514),
so the fix you ask for should be the reduction of the number of active TCP connection in BT client.

Probably also these arguments can help you:
http://www.wilderssecurity.com/showthread.php?t=67295
http://www.wilderssecurity.com/showthread.php?t=65778

[halcyon]

Thanks, good catch.