<html><head></head><body><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div>Hi all,</div><div><br></div><div>We are building VPN using OpenSSL 1.1.0e. VPN can work with TLS and DTLS. The test server is Linux Ubuntu 16.04 and client windows 7/10. </div><div><br></div><div>We tested using dummy net with different parameters like 0.1/0.2 /.5% packet drop and 20 ms delay. In this scenario, <span style="color: rgb(0, 0, 0); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;">DTLS shows marginal <span style="color: rgb(0, 0, 0); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;">5 to 7%</span> poor performance than TLS under different network conditions. We are using async socket. epoll on linux and select on the windows side. </span></div><div><span style="color: rgb(0, 0, 0); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;"><br></span></div><div>Do we know any known performance limitation with DTLS in existing OpenSSL lib?</div><div><br></div><div>Thanks in advance</div><div>Anand</div></div></body></html>