Hi Christoph,
Thanks for the answer.
I've used Openwrt and It was possible to connect to the router and to use the command line. I want to install openvpn, I don't think that's possible with telnet. A ssh connection seems to be better, I think.
Regards, Lucas
Telnet is not available anymore (SSH is enabled by default, one is supposed to set a password upon first login).
It might be the router doesn't have enough entropy, which it needs to generate the Dropbear keys. Without those (internal) keys you'll be unable to log in.
Thank you. Running openwrt now, by hard reset. I will upgrade to Lede. After that I like to install vpn.
Purpose is to connect my phone to a vpn tunnel when I am using outside an open / insecure wifi, to browse safe and secure.
I hope a suitable guide is available.
Regards, Lucas