I want to set password policies for users on a Debian VM, like minlen and special char required for the password.
In my Debian VM I get an error and can´t log in again via SSH to that machine.
OS Version: Debian Bullseye 11
Kernel Version: Linux 5.10.0-9-amd64 x86_64
Modifying the config file /etc/pam.d/common-password starting at the line:
# here are the per-package modules (the "Primary" block)
password [success=1 default=ignore] pam_unix.so obscure yescrypt
and inserting something like shown in (https://www.networkworld.com/article/2726217/how-to-enforce-password-complexity-on-linux.html):
minlen=8 dcredit=1 ucredit=1 lcredit=1 ocredit=1
Without any changes at that file I can enter the machine without any problems e.g. Public Key is uploaded correctly, SSH Port is open, SSH and SSHD services are active.
Again when I try to remote connect via SSH:
ssh -v USER@IP
I get in the last lines this error:
debug1: Next authentication method: password
USER@IP's password:
debug1: Authentications that can continue: publickey,password
Permission denied, please try again.
