Hi,
Bit out of my depth with this VPN stuff, so please excuse me if I’m doing something very wrong here. 
Trying to get my laptop running LEAP 42.1 (and KDE) to connect to my NAS that is running an L2TP/IPsec server.
On my laptop, in Connection Editor, I’m unable to find out where I can enter the pre-shared key. It’s not listed in the Authentication drop-down box.
I found this tutorial which looks like it’s for Mint users and it mentions:
PSK is supported starting with NetworkManager-strongswan-1.3.1, but strong secrets are enforced.
So, I check and I’m running:
$ sudo zypper se -is swan l2tp
Loading repository data...
Reading installed packages...
S | Name | Type | Version | Arch | Repository
--+---------------------------+---------+------------+--------+--------------------------
i | NetworkManager-l2tp | package | 1.0.4-3.1 | x86_64 | home:dkosovic
i | NetworkManager-l2tp-gnome | package | 1.0.4-3.1 | x86_64 | home:dkosovic
i | NetworkManager-l2tp-lang | package | 1.0.4-8.1 | noarch | home:iSipi
i | NetworkManager-strongswan | package | 1.3.1-7.1 | x86_64 | openSUSE-Leap-42.1-Oss
i | plasma-nm5-strongswan | package | 5.5.5-9.1 | x86_64 | openSUSE:Leap:42.1:Update
i | plasma-nm5-strongswan | package | 5.5.5-9.1 | x86_64 | openSUSE:Leap:42.1:Update
i | plasma-nm5-strongswan | package | 5.5.5-9.1 | x86_64 | openSUSE-Leap-42.1-Update
i | strongswan | package | 5.3.5-14.1 | x86_64 | home:iSipi
i | strongswan-ipsec | package | 5.3.5-14.1 | x86_64 | home:iSipi
i | strongswan-libs0 | package | 5.3.5-14.1 | x86_64 | home:iSipi
i | strongswan-nm | package | 5.3.5-14.1 | x86_64 | home:iSipi
i | xl2tpd | package | 1.3.6-3.2 | x86_64 | openSUSE-Leap-42.1-Oss
i | xl2tpd-doc | package | 1.3.6-3.2 | x86_64 | openSUSE-Leap-42.1-Oss
Is there a way to enter the PSK?
Thank you.