Pluggable Authentication Modules handle authentication tasks of applications or services running on the system.

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44
votes
2answers
11k views

Why is there a big delay after entering a wrong password?

I notice a weird (well, according to me) thing about passwords. For example, if I type an incorrect password during login, there will be a few seconds' delay before the system tells me so. When I try ...
16
votes
2answers
3k views

How does one change the delay that occurs after entering an incorrect password?

After entering an incorrect password at a login prompt, there s an approximately 3-second delay. How can I change that on a Linux system with PAM?
2
votes
1answer
11k views

How to lock users after 5 unsuccessful login tries?

How to lock users after 5 unsuccessful login tries? I gathered a few distributions/versions to how to do it, but I can't test it. RHEL4: by adding the: auth required ...
2
votes
4answers
13k views

vsftpd fails pam authentication

Moving a tried-and-true vsftpd configuration onto a new server with Fedora 16, I ran into a problem. All seems to go as it should, but user authentication fails. I cannot find any entry in any log ...
1
vote
2answers
1k views

newgrp and groups assigned via pam_group.so

For convenience reasons I tend to assign special group memberships like floppy, audio, plugdev, video etc. via /etc/security/group.conf (pam_group.so) mechanism instead of adding all users to this ...
14
votes
1answer
1k views

How to prevent shutdown when an SSH user is logged in?

I'm administrating a networked environment and I had an interesting situation arise yesterday. When a host is required to shutdown by a regular user, it refuses to do so if other users are logged in ...
7
votes
1answer
674 views

What steps does the system go through when handling an SSH connection?

What steps does the system go through when handling an SSH connection? We try to log in via ssh sshd starts pam and pam module to authenticate us Depending on pam configuration, we need to provide ...
1
vote
3answers
55 views

What is the exact definition for “logging in”

Radu's answer is extremely informative here http://askubuntu.com/questions/376932/why-who-command-does-not-shows-root-as-a-logged-in-user However this makes me wonder "what is the exact definition for ...
0
votes
0answers
54 views

How can I add PAM functionality in netkit-rsh-0.17

I am using CentOS. In my project, that is working on a network, I need an rsh utility. I downloaded netkit-rsh-0.17 for that and until recently all worked fine. But now I found that this utility ...
-1
votes
2answers
101 views

Why rsh not opens and reads PAM modules and limits.conf?

I am working on a project, that uses rsh utility for remote connection. But my project needs some extra features for that, so I add that features. Till now, all the things are going fine. But when I ...