Tagged Questions

0
votes
0answers
8 views

How to make simple system user authentication work with postfix/dovecot on 12.10?

I have been wrestling on this a LOT. I never properly understood but I presume that authentication by the system users is done with PAM and the default authentication method for both Dovecot and ...
0
votes
0answers
23 views

Unknown module with PAM authentication and IPSec/OpenSwan VPN on 12.10

I have setup a VPN on my home Ubuntu 12.10 server using instructions found here using CHAP authentication: https://raymii.org/s/tutorials/IPSEC_L2TP_vpn_with_Ubuntu_12.10.html I'd like to now change ...
3
votes
1answer
104 views

Login on local terminal without password

I have a virtual guest of Ubuntu on a KVM Machine, I've setup the machine so I can type virsh console and be dropped into a console. I realise the security considerations here, but is it possible to ...
3
votes
0answers
60 views

How to use PAM to restrict HTTP access for some users?

I've read that PAM can be used to restrict HTTP access for some users, but I can't figure out how to do it in Ubuntu 12.04. The /etc/security/time.conf man page contains this example: All users ...
3
votes
1answer
304 views

What causes “pam_unix … conversation failed” in auth.log

There are thousands of entries in my auth.log like this: sudo: pam_unix(sudo:auth): conversation failed What causes these to occur? I'd like to fix whatever it is but I'm a bit mystified as to ...
0
votes
0answers
190 views

Diagnose and Fix PAM Configuration

I have a server that has a number of wierd authentication related issues. Just to give a couple of examples, first, I cannot get adduser to work properly. Adding user `test' ... Adding new group ...
3
votes
0answers
213 views

How can I set up radius authentication properly?

On all of our linux workstations, we have configured the PAM modules to use radius authentication. This works well for all of the various things like login on the console, login using ssh, sudo, etc. ...
1
vote
0answers
466 views

Configuring PAM with LDAP and Kerberos

I am trying to configure PAM with LDAP and Kerberos for authentication. Command id <username> is working fine so LDAP seems to be working fine and also kinit is working (followed by klist) and ...
46
votes
2answers
4k views

How can I use a passcode generator for authentication for remote logins?

I would like to strengthen the authentication of my SSH logins by adding another factor: a passcode generator device, or a passcode generation application on my mobile phone. The only obvious options ...
1
vote
0answers
394 views

Unable to login to ubuntu server 12.04

Unable to login Ubuntu Server 12.04. After enter login-password I see login page again. Jun 29 16:32:54 machinename login[8450]: pam_unix(login:session):session opened for user username by ...
2
votes
1answer
875 views

After Upgrade to 12.04 the Login takes forever

I recently upgraded from Xubuntu 11.10 to 12.04. Since then it takes a very long time for me to Login. The time it takes to get to the login screen is normal but after I type in my password it takes ...
0
votes
1answer
2k views

How do I enable account lockout using pam_tally? [closed]

I am trying to implement account lockout in ubuntu using pam_tally. I have tried adding the follwing lines in /etc/pam.d/common-auth auth required pam_tally.so deny=3 account required ...