OpenVPN Support Forum

HI all,
I have just setup my own openvpn server in ubuntu with ECDHE or ECDSA. I have verified my setting and formed a working connection via tunnelblick. However I can't use the same config file in iOS client. Does anyone have idea on the apps development process? Suppose I really want to use this setting, what kind of apps client/ system setting i can use?

Thanks

Does anyone use ECDSA to connect Openvpn server successfully?
May I ask your configuration if any

I can confirm this issue. I've set up two entire key sets (CA, server, clients) using both the prime256v1 and secp384r1 curves (one full set for each curve, no mixed sets), and while I can connect using either set from macOS and Windows clients, iOS reports "no shared cipher" every time. The iOS client appears to lack support for elliptic curve-based key agreement (ECDHE).