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L2tp stop working After iOS Update from 13.7 to 14.xx

After Upgrade iOS from 13.XX to 14.XX l2tp over IPSec Connection stop working.



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  • Resolved by changing the L2TP-IPsec policy to the following:

    IKE Encryption Algorithm - AES 256

    IKE Authentication Algorithm - SHA2 256

    IPsec Encryption Algorithm - AES 256

    IPsec Authentication Algorithm - SHA2 256

  • I've got the same problem and could fix it with the policy changes you mentioned above.

    Unfortunately, when I try to connect, I can only get a successful authentication when I use the first user in the "L2TP over IPSec" list (which is sorted alphabetically). So, when I try to connect using e.g. 'UserB', the authentication fails, because it is trying to authenticate 'UserA', which is the first one in the list. This can also be traced in the IPSec log files.

    Additionaly, when I click on the 'i'-symbol at the 'L2TP-over-IPSec' policy, I can see that there is a distinct use for that policy for the first user in the list. No matter what I tried, I couldn't change that behavior.

    Is there a solution for that problem?

    Regards

  • are you trying get both devices to connect ‘from’ the same router/IP to two different L2TP user accounts on the UTM?

  • No, it always tries to authenticate with the alphabetically first user in the list, no matter what internet connection is used or what username is typed in.

Reply Children
  • I too am having this issues. When I try to connect from my phone, the LiveLog always shows that it’s connecting as the first user is the list. I’m not sure how to tell if this is a bug with the iOS not sending the username or if the UTM isn’t reading the username submitted.  Perhaps it’s time for some packet sniffing.