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L2TP/IPSEC connection to Unifi USG
Sorry, I see similar questions but cannot find an answer that works in my case. Trying to establish a L2TP connection over 4G LTE from RUT955 to a Unifi USG. Have tested the connection with Windows device behind the RUT955 and it works fine. On the RUT955 the IPSEC connection seems to come up fine:
But LT2P never connects. I am getting this in the logs over and over again.
Any assistance on where to look next would be greatly appreciated. This is driving me nuts - Also have an RUTX11 and does exactly the same thing. Both on R_00.07.02.04.
After snooping around for a bit, I found that trying to downgrage the L2TP version could help. To to that, you would need to install a FW version that is older than 7.1 and then try to see if the connection still fails.
Also, please, double check if all of the configuration is correct, like the right and lefts ids, ips and so on.