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ramirez
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Topic Author
Posts: 144
Joined: Sun May 12, 2013 9:48 pm

L2TP/IPSEC not connecting

Fri Jan 29, 2021 4:28 pm

When trying to establish a connection between 2 M.T. routers if (on the server side) chose NOT to use IPSEC, and do the same on the client side, the link is established.

If on the other had I chose (on the server side) IPsec=required enter a password and do the same for the client , I get a log (on server side):

L2TP connection rejected no IPsec encryption while it was required .

On the client side I get:

L2TP: terminating...-tunnel was not encrypted

Obviously there is something going on with the encryption but cannot located it ...

Anyone please for ideas?
 
Sob
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Posts: 9119
Joined: Mon Apr 20, 2009 9:11 pm

Re: L2TP/IPSEC not connecting

Fri Jan 29, 2021 5:20 pm

Check what happens with IPSec, peer status, logs, ...
 
Van9018
Long time Member
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Posts: 558
Joined: Mon Jun 16, 2014 6:26 pm
Location: Canada - Abbotsford

Re: L2TP/IPSEC not connecting

Sat Jan 30, 2021 2:03 am

I had a similar issue. The L2TP/IPSec creates a default Policy/Proposal/etc. I had an additional policy, an old one that I didn't use.

When I'd connect with Win7, it would pick the correct policy and establish ok.

When I'd connect from a Mikrotik, it would give me errors about no proposal.

I never did figure out why a Win 7 L2TP/IPSec could connect, but another Mikrotik couldn't. None the less, the solution for me was to delete the additional policy that I didn't need anyway.
 
negge
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Posts: 43
Joined: Fri Jul 10, 2009 11:05 am

Re: L2TP/IPSEC not connecting

Tue May 03, 2022 5:23 pm

I stumbled upon this problem today as well. A router running 7.1rc6 is connecting to a router running 7.2.1, and for some reason a stray dynamic peer entry had been left dangling on the client router. Removing the peer entry made it create a new one and the tunnel was successfully established again.

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