Hi,

It's on 6.41rc47, as L2TP/IPSEC VPN client: on average the throughput is very low, at start of speed tests the throughput goes high but then plummets..
A weird thing noticed: the throughput improves considerably when I run the Packet Sniffer on the L2TP interface!
Does anyone have an insight into what happens here and how to fix the problem?

Thanks much

A weird thing noticed: the throughput improves considerably when I run the Packet Sniffer on the L2TP interface!

Running Packet sniffer disables FastPath and Fasttrack. Check your firewall settings if you have fasttrack enabled.

Similar thread: very strange slow web access but can be solved by packet sniffer?

Running Packet sniffer disables FastPath and Fasttrack. Check your firewall settings if you have fasttrack enabled.

Similar thread: very strange slow web access but can be solved by packet sniffer?

Yes! Actually found it myself , before seeing your reply: disabling the Fasttrack FW rule solves it. Disabling the FastPath decreases the throughput though. Thanks!