Performance? iperf measurements representative of real world data?
I used, until yesterday, an IPSec site to site link to tunnel just about all my traffic.
Then I played with OpenVPN and did some performance testing with iperf :o
iperf -c 126.96.36.199 -i 10 -fK -n 1024M
IPSec: (AES 256 GCM) [lower levels of encryption improve performance only marginally]
[ 3] 0.0-697.0 sec 1048576 KBytes 1504 KBytes/sec
[ 3] 0.0-221.8 sec 997888 KBytes 4500 KBytes/sec
OpenVPN: (AES 128 CBC)
[ 3] 0.0-263.8 sec 857856 KBytes 3252 KBytes/sec
Does anyone know if iPerf just produces atypically compressible data, or is OpenVPN really THAT much faster?
What's the fastest/best performing compression? Don't really have any relevant unencrypted data on the link, since it's simply a routing tunnel, I just need things encrypted enough that some ISP doesn't get the idea to to do content filtering or stuff like that, so even a simple fixed-key XOR would be good enough, but the performance gains with the unencrypted link are inspiring…
Still shocked by these numbers....