How to bypass the password on the DIR-100 router?

Question

network hardware

There is a router DIR-100 rev. B1 firmware 2.01 (en), which you need to get to.
It is categorically impossible to reset to default, tk. the current settings are required.
The current password is unknown.
What has already been done:
1. Tried standard passwords: empty, admin, password
2. Substitution of user-agent in the browser for xmlset_roodkcableoj28840ybtide, according to the recommendations of this article
3. Tried this recommendation
What other options are there besides brute force - is this a last resort?

Answer 1

Another option is to forward the Internet to the LAN, and give here a direct link to this dir-100 without an intermediate firewall. Further options are possible: either you will be prompted, or not.