Hi all. I got an IPSec VPN Tunnel between Europe and USA (latency 135 ms). The internet link on the Europe side is 50/50 Mbps, whereas in USA it is 100/100 Mbps. Using iperf I could only measure 10 Mbps throughput in this VPN tunnel. I also lowered the MTU size to 1410 bytes but it didn't help (it didn't get better, nor worse).
Where do I need to take a closer look at, to find out where the issue is?
Many thanks in advance and regards, Flavio.