Hello,
thank you all for your suggestions.
From: Julien ROBIN julien.robin28@free.fr
Take another well known product from well known trademarks Linksys, D-Link, Netgear, Sitecom, TP-Link, or something compatible with OpenWRT for example.
Okay, I'm going to try a new router. I don't use VoIP or TV-Services. Just a Tor Node and a hidden Service.