Solved

Block password authetication on specific  user on Linux

Posted on 2013-05-17
3
582 Views
Last Modified: 2013-05-17
Hi,
I need to block password authentication for only specific users on Linux server, and leave key
option only. User can't be blocked to use password for other protocols like ftp

All changes should be done in sshd_config file
For UNIX I use following but it block all users on Linux

PasswordAuthDenyUsers user1 user2 user3
ChallRespAuthDenyUsers  [pam] user1 user2 user3

Thanks
0
Comment
Question by:IKeystone
3 Comments
 
LVL 26

Expert Comment

by:skullnobrains
ID: 39175602
create a group for your user in sshd_conf and deny whatever types of authentication you need in that group
0
 

Author Comment

by:IKeystone
ID: 39175815
Can you send me an example ?
0
 
LVL 28

Accepted Solution

by:
serialband earned 500 total points
ID: 39176279
I believe the following should work on your linux system.

Create a group named keyonly and put your users in it.

Then add the following to /etc/ssh/sshd_config

Match Group keyonly
      PasswordAuthentication no
      ChallengeResponseAuthentication yes



You could also just match individual users.
Match User User_Name
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Using libpcap/Jpcap to capture and send packets on Solaris version (10/11) Library used: 1.      Libpcap (http://www.tcpdump.org) Version 1.2 2.      Jpcap(http://netresearch.ics.uci.edu/kfujii/Jpcap/doc/index.html) Version 0.6 Prerequisite: 1.      GCC …
Fine Tune your automatic Updates for Ubuntu / Debian
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.

895 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now