Slow Speed through APM SSL VPN Even With DTLS

Hey Nicolas

I have an F5 SWG but I have verified that traffic is not passing through that solution, it is routed directly using a Wildcard Performance L4 VS. However, when using a different speedtest provider, my results are much better. So this could merely be the bandwdith tester that causes the low speeds.

I set up an iPerf server inside my network and ran an iPerf test bost using TLS1.2 and DTLS. Here are the results:

iperf3.exe -c 10.10.15.10 -p 2222
Connecting to host 10.10.15.10, port 2222
[  4] local 10.10.10.248 port 31409 connected to 10.10.15.10 port 2222
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec  3.38 MBytes  28.3 Mbits/sec
[  4]   1.00-2.00   sec  3.75 MBytes  31.5 Mbits/sec
[  4]   2.00-3.00   sec  3.75 MBytes  31.5 Mbits/sec
[  4]   3.00-4.00   sec  3.75 MBytes  31.4 Mbits/sec
[  4]   4.00-5.00   sec  3.62 MBytes  30.4 Mbits/sec
[  4]   5.00-6.00   sec  3.75 MBytes  31.4 Mbits/sec
[  4]   6.00-7.00   sec  3.75 MBytes  31.4 Mbits/sec
[  4]   7.00-8.00   sec  3.62 MBytes  30.4 Mbits/sec
[  4]   8.00-9.00   sec  3.75 MBytes  31.4 Mbits/sec
[  4]   9.00-10.00  sec  3.75 MBytes  31.5 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-10.00  sec  36.9 MBytes  30.9 Mbits/sec                  sender
[  4]   0.00-10.00  sec  36.8 MBytes  30.9 Mbits/sec                  receiver

iperf Done.

iperf3.exe -c 10.10.15.10 -p 2222
Connecting to host 10.10.15.10, port 2222
[  4] local 10.10.10.247 port 31093 connected to 10.10.15.10 port 2222
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec  6.38 MBytes  53.4 Mbits/sec
[  4]   1.00-2.00   sec  8.12 MBytes  68.2 Mbits/sec
[  4]   2.00-3.00   sec  7.62 MBytes  63.9 Mbits/sec
[  4]   3.00-4.00   sec  7.25 MBytes  60.8 Mbits/sec
[  4]   4.00-5.00   sec  7.88 MBytes  66.1 Mbits/sec
[  4]   5.00-6.00   sec  7.38 MBytes  61.8 Mbits/sec
[  4]   6.00-7.00   sec  7.75 MBytes  65.0 Mbits/sec
[  4]   7.00-8.00   sec  7.88 MBytes  66.1 Mbits/sec
[  4]   8.00-9.00   sec  7.25 MBytes  60.8 Mbits/sec
[  4]   9.00-10.00  sec  7.50 MBytes  62.9 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-10.00  sec  75.0 MBytes  62.9 Mbits/sec                  sender
[  4]   0.00-10.00  sec  74.9 MBytes  62.8 Mbits/sec                  receiver

iperf Done.   

The results are significantly better with DTLS. So I guess it is in fact working as it should and we just need to make sure we have a proper test.