Debian不能使用ssh登录duo，提示密码不正确 about duo-buildroot-sdk

[onkoe]

I fixed this issue for my custom buildroot by mounting the finished image, opening up /etc/shadow, making a new password hash with openssl passwd -1 "milkv", and pasting the output hash between the first two colons after root in the file.

On the other hand, you can also use serial to automatically login and change the password. That's described here! ☺️

[RedLeaves699]

@onkoe Thank you for your experience, it really helps.

I login milkv successfully now by serial and change the password of "root". Unfortunately, I still can't login by SSH on my Debian machine. But I login in "root" successfully with SSH on Windows Powershell, which makes me confused...

I checked the version of SSH on duo, it's Dropbear v2020.81, while the SSH version on my Debian machine is OpenSSH_9.2p1 Debian-2+deb12u1, OpenSSL 3.0.11 19 Sep 2023. Problems may arise here.

[onkoe]

Glad it helped! Let’s see if we can get this fixed. 😄

In your ~.ssh/authorized_keys file, is there an existing entry for the Duo’s IP? If so, try removing it!

Otherwise, what seems to be the issue? Does it not connect at all, or is the password just not working?

[RedLeaves699]

Glad it helped! Let’s see if we can get this fixed. 😄

In your ~.ssh/authorized_keys file, is there an existing entry for the Duo’s IP? If so, try removing it!

Otherwise, what seems to be the issue? Does it not connect at all, or is the password just not working?

I have removed the authorized_keys. The issue is that the password just not working. Although I input correct password again and again...

[RedLeaves699]

I think I found some clues about the problem. I used ssh -vvv [email protected] on my Debian machine and my Windows10 machine, part of the difference of the result is shown below:

Debian 12 (Can not login duo)

debug1: Local version string SSH-2.0-OpenSSH_9.2p1 Debian-2+deb12u1
debug1: Remote protocol version 2.0, remote software version OpenSSH_9.2p1 Debian-2+deb12u1

Windows10 (Successfully login duo)

debug1: Local version string SSH-2.0-OpenSSH_for_Windows_8.1
debug1: Remote protocol version 2.0, remote software version dropbear_2020.81

It seems that OpenSSH_9.2p1 Debian-2+deb12u1 can't recognise the correct SSH version of milkv-duo.