Thread: Slow File Copy Issue across vpn tunnel
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Old 2008-05-10
melipla melipla is offline
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Default Re: Slow File Copy Issue across vpn tunnel
Its a known issue. Taken from sk32651, issue this [SPLAT] command to the NGX gateway(s):
fw ctl set int fwtcpstr_max_window 65536

That setting won't survive reboot, but if it fixes your problem, edit the $FWDIR/boot/modules/fwkern.conf file (create a new one if it doesn't exist) and add this line:
fwtcpstr_max_window=0x10000

Which should set the parameter after each boot. Took me forever to solve that one. Be aware that changing that parameter affects the performance of Smart Defense, which is the primary reason why its not "fixed" by default.
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