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@Staff Thank you for taking the time to write such a detailed and informative reply. It is much appreciated. I'm unfortunately starting to think that Hummingbird just isn't ready to be used as a drop-in replacement for OpenVPN -- at least on my system. Perhaps that was never your intention and I simply misread the situation. While I am sure it is a perfectly good back-end for Eddie, I am less confident about its capabilities as a standalone VPN client for a number of reasons. First, as you yourself have noted, the profile parser still looks to be "work in progress" that seems not to have been fully tested. Perhaps the OpenVPN 3 developers will get around to fixing the persist-tun problem but the issue as I see it is that you have committed to using OpenVPN 3 code that is arguably not yet ready for production use -- and the OpenVPN devs are probably under little pressure to get things fixed asap. If you are going to have to wait for fixes to arrive from upstream developers, that might not be a comfortable position to be in. I was also a little disappointed to see that up and down scripts are not supported in Hummingbird (or, it would seem, in OpenVPN 3). This is not noted in the documentation. I was also rather surprised to see that the system log shows further OpenVPN directives that are being "unused", including persist-key and auth-nocache, and this behaviour is, once again, undocumented. If you are going to diverge from OpenVPN 2.5 methods of working, which is what most of us will be familiar with, you really do need to highlight the differences more clearly in the documentation. I have reluctantly come to the conclusion that I am not yet ready to use Hummingbird "live". It has some great innovations, such as DNS handling and firewalling, but I believe that a security product needs to be well tested and built on solid foundations. I am not confident that either of these requirements is currently being met. I wish you every success with the future development of your suite of programs and I will no doubt revisit them at some point in the future.