FritzBox 7590 and RUT956

kazham · June 5, 2025, 2:30pm

Does anyone have managed to connect these two devices(or similar) via WireGuard in Site-2-Site mode?
Please, share step by step instructions, because I’m desperate. We have a lot of clients with RUTs, but I cannot establish the connection. One time I was able to establish a connection, but it worked only one way, so I could ping all FritzBox LAN-devices from RUT’s network. But then I accidentally deleted this configuration in RUT and I cannot recall it.

Thank you!

Edited:
I have added more detailed description for my configuration:

I have already created Lan to Lan connection in WireGuard settings in FritzBox 7590 (If needed I can recreate the whole things again):

When I click here

I get this settings:

And when I click here

I get this settings:

It needs to be mentioned that I can ping my FritzBox by its DNS-name from the CLI interface of the RUT956.

And yes, I have already asked AVM for help, but they have no any wish to explore this problem and they pointed me to this forum. I hope this community is more helpful.
Thank you!

Edited:

Here is RUT956 WireGuard settings:

Thank you!

MatasR · June 6, 2025, 5:23am

Hello,

The user @wharbauer has recently had issues with WireGuard and FritzBox as well, and has made a short example in the comments section of how everything should be set up. You can find the thread here: TRB140 and Static Route with WireGuard VPN

The configuration shouldn’t be any different when using a RUT956 for this.

If this is not something you’re looking for, could you please provide a topology of your desired configuration?

Regards,
M.

kazham · June 6, 2025, 7:28am

Thank you MatasR for your quick respond, but this solution didn’t help me.

MatasR · June 6, 2025, 7:32am

No worries at all, I see you’ve edited your thread to add some images, thank you for that, however, you didn’t post any configuration images of your RUT956 WireGuard configuration, could you do that as well?

Ensure that you’re also blurring out any sensitive information before posting the configuration.

Thank you,
M.

kazham · June 6, 2025, 7:34am

Ok. Thanks. Will be ready in a couple of minutes.

MatasR · June 9, 2025, 6:16am

Hello,

In your FritzBox configuration, I can see that you have your FritzBox LAN IP set instead of the WireGuard server IP:

This is an older screenshot I’ve made for a different client, but in your case, it says 192.168.1.2 here, which I don’t believe is correct.

Next, this IPv4 section is for the WireGuard interface IP, not the LAN subnet:

This IP can be pretty much anything, for example, 172.16.10.1/24 or even /32, doesn’t matter.

Next, the peers list:

You have added yourself to the peers list, instead of the FritzBox (peer device), which you are trying to reach.

Please double-check these settings and make sure they’re correct as per the instructions.

Thank you,
M.

kazham · June 10, 2025, 8:07am

Thank you very much MatasR for your help! I have applied your corrections to my settings, but it didn’t help. I’m quite sure that the problem lies in the FritzBox area, so I decided to start all over again. Could you review these settings, so we could move over?

I hope I have understood your corrections about FritzBox’s Wireguard settings.
I’m aware that you must not be an expert in AVM devices. I just hope that you are!

Thank you very much for your help.

MatasR · June 10, 2025, 11:13am

Hello,

I’ve sent you a form to fill out so we can continue our conversation in private, to avoid accidentally leaking any sensitive information. In the Ticket ID field, simply enter the thread’s number, which is 14089.

Thank you,
M.