IPsec worked best for me too, until recently. Suddenly, I couldn’t send e-mail while on VPN, but I could when I was off VPN. I did an nmap of the mail server pr

IPsec worked best for me too, until recently. Suddenly, I couldn’t send e-mail while on VPN, but I could when I was off VPN. I did an nmap of the mail server provided by my ISP, and ports 465 and 587 simply weren’t open to me while I was on VPN, but were when I was off. Oddly, when I was on VPN, that server also appeared to be open on ports 22 and 80 but not when off VPN. That machine definitely should not be open on 22 and 80, so something really strange is going on. So, I had to find an alternative. So far, I’ve tried WireGuard, ZeroTier, and now OpenVPN via Mullvad. I just couldn’t get reliable connectivity with WireGuard and ZeroTier on all my devices, regardless of the configuration I used. OpenVPN is known to be slow and a CPU hog, but at least it seems to work. And I’ve done speed tests with fast.com and DSLReports, and both show me getting ~20-30 mbps or faster download speeds while on VPN, and that’s not much slower than what I was getting when off VPN. And “wehe” shows that I was getting throttled by the carrier even when on WiFi, not just on cell. Now, I’m not throttled at all. I have not yet noticed any problems with extreme battery loss or high CPU, but we will just have to wait and see.