Hi, I use the same user-certificate on my Mac ( client is openconnect ) and my iPhone ( client is anyconnect ) Things were fine on my Mac, but on the iOS, the connection could not be established. Here is my ocserv.conf: https://gist.github.com/rankjie/bb7c7e4bfe86d323abb6 Server?s log when connect to it on iOS: https://gist.github.com/rankjie/8618400ba3a2075457b0