Bumping this up.
As there is still no reply at all after 2 years (in this forum) and 4-5 years on TJC.
This affects a lot of Germans (where AVM, FritzBox is quite often used).
Everybody is happy to download a binary from internet location and use this?
And in 4.3.0 the Cisco / VPNC client is still not able to connect to a FRITZ Box 
I think VPNC has Cisco specific features (and limitations).
I think there should be IPSec/IKEv1 (&IKEv2) VPN setup that uses StrongSwan (or Openswan, Libreswan)
We now track this issue internally.
Is there a compiled binary to downloaf sonewhere for the latest SFOS version? It seems that the links above are not working anymore. Thanks in advance.
Fritz!OS does apparently support Wireguard VPN too now.
Maybe this can solve this issue as well?
Unfortunately, for my device (5530) there is only v7.29 available yet. I will report back if vpn through wireguard works with Sailfish once a compatible release is available for my box!
Good news, hopefully that will help. I have a 7590 with Freetz on it and don’t want to fiddle too much with it as the system works and does what it should.
The 7490 could get the update as well.
There has been Wireguard support in FreetzNG for a while, but I know exactely what you mean regarding fiddling:) Never change a running system (and FreetzNG is even more experimental:-)).
It seems the latest Wireguard package 0.4 (WireGuard for Sailfish (Settings UI) | OpenRepos.net — Community Repository System) works well together with official FritzOS 7.50!
Great! No 7.5 release for the Fritz!Box 5530 available yet, but I can’t wait to check it out!
It seems the 5530 had the 7.30 update just released in September, maybe it takes some more time to update this specific device?
We’ll see… There might be some experimental lab firmware available but well - I can wait a bit. Support has been announced eventually, so I’m confident it will arrive rather sooner than later…
It’s a very nice box anyways.
I forgot to mention that the patches found above work on an XA2+ and I could connect via Cisco protocol to a FritzBox 7490. Thank you all for the tips and @Nokius for the patches.
This bug is fixed now as of 4.5.0.16:
Yes, VPN to a Fritzbox would be possible now.
Unfortunately, Xperia X10 III is still unable to establish IPV4 mobile network connection with major carriers, so no VPN from mobile network, only from WiFi.
Wireguard VPN to Fritzbox had been working fine, but is broken since SFOS 4.5.
Maybe Jolla have fixed this bug but the situation is worse than before. Bummer.
Jey, eventually!
Um was geht’s in dem Artikel? Heise erzwingt leider tracking.
7.5 is available for the 5530 now too.
I’m using Firefox focus to avoid tracking, or at least reduce it. Are there any websides at all that still do not track?
I eventually updated my fibre fritzbox (5530) and I’vejust configured wireguard vpn from my xperia 10ii to the fritzbox now - I simply enabled wireguard in the fritzbox web interface and downloaded the settings file.
My first attempt to load this file in the jolla settings failed since it containes a double dns entry (fritzbox local ip and, for some unknown reason, ‘fritz.box’).
I simply deleted the second entry and the settings file was accepted by SfOS instantly. Wireguard VPN seems to work fine now, but I haven’t tested for longer than 5 minutes yet.