"The l2TP-VPN server is did not respond. try reconnecting. if the problem continues, verify your settings and contact your admin."
but if I try on my other iphone which runs ios 13.7 it connects fine with the same exact settings.
How can I fix that
-> IPsec encryption algorithm: 3DES
-> IPsec authentication algorithm: SHA2 256
We have upgraded the proposed ciphers in L2TP IPsec VPN to also propose SHA-256 for the Child SA in IPsec. The issue seems to be that the server is accepting SHA-256 cipher for the child but maybe dropping the ESP encrypted packets with SHA-256 HMAC. This maybe because the server is assuming a SHA-256 HMAC with 96 bits instead of the standard 128 bits. Switching the SHA-256 HMAC output from 96 to 128 bits should fix this issue.
If you’d like to see Apple make a change here, please file a bug.
If you’re seeking informal help, or just want to discuss this issue with your peers, you should pop on over to Apple Support Communities.
If you’re seeking formal support, you should talk to Apple Support.
Same problem here with iOS 15.0.2 and iPhone 13 Pro max, why apple still not fix it?
Hi I need to L2TP keys for connection to vpn i