Recently I upgraded my Linksys WRT54GL to Asus RT-N66U.
All is good, but VPN performance is really disappointing.
Old WRT54GL throughput with OpenVPN on 10 Mbit sync line was about 3.6 Mb/s (~ 450 KB/s)
Naturally, router CPU was the bottleneck, I could see openvpn process running at max CPU.
Now, on the same 10 Mbit line RT-N66U gives about 0.4 Mbit/s (~50 KB/s) and router is literally idle.
I have experimented with tun, tap, tcp and udp is all combinations. Also, experimented with mtu size, set mssfix and/of fragment parameters - no changes whatsoever - the same 40-50 KB/s.
Without VPN I can reach line max speed, about 10 Mb/s.
WRT54GL is running Tomato v1.27vpn3.6
RT-N66U is running Tomato Firmware 1.28.0000 MIPSR2-110 K26 USB Mega-VPN-64K
VPN configuration is the same for server and clients on both routers.
Any suggestions, please? To try older firmware perhaps?
