Configuring for centos 7 L2TP VPN servers to work with iOS 14 and macOS Big Sur client devices
resloved Configuring for centos 7 L2TP VPN servers to work with iOS 14 and macOS Big Sur client devices For Centos 7 l2tp server at /etc/ipsec.conf "sha2-truncbug=yes" change to "sha2-truncbug=no" service ipsec restart I hope it can help for you.
