sndbuf 225280
rcvbuf 225280
txqueuelen 486
fast-io
nice -5

Tested on MIPS 533Mhz

proto udp
remote ip.janforman.com
dev tun
ifconfig 10.8.0.2 10.8.0.1
route 172.24.16.0 255.255.255.0 10.8.0.1
secret static.key
cipher AES-128-CBC
verb 0
mute 20
mssfix 1432
keepalive 10 60
ping-timer-rem
persist-tun
persist-key
sndbuf 393216
rcvbuf 393216
fast-io

redirect-gateway def1 → route all traffic thru VPN

//Windows
ping -n 1 -l 1500 -f www.example.com
//Linux
ping -M do -s 1500 -c 1 www.example.com

MSS fix = MTU - 40