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Accessing remote machines


I want to hack PAM authentification in a remote machine (moving to pam_ldap), but I want to be sure to continue to access the machine if something go wrong.

So I ask you: How do you handle special access to remote machines?
For firewall hacking I used 'cron' to disable the firewalls at a specified time, but for PAM it seems some more difficult.

I'm thinking about compiling sshd without PAM support, set some strict rules about who/how can connect, and attach it to a 'private' port. Would this works? I will act as root without problems, also if my PAM rules are wrong?


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