Solved

How to: Disable SSH public key authentication on RedHat Linux server

Posted on 2014-10-08
13
332 Views
Last Modified: 2014-11-22
I have a RedHat server and would like to remove SSH public key authentication on it, so that i can SSH into it without needing a key.

What I have already tried is this:
Added PubkeyAuthentication No into /etc/ssh/sshd_config config file. Then ran the command sudo /etc/init.d/sshd reload
0
Comment
Question by:cgruber
  • 4
  • 4
  • 2
  • +2
13 Comments
 
LVL 8

Expert Comment

by:Pepe2323
ID: 40369729
Hi

that option that you set on ur sshd_config will force you  to authenticate only by password, this is what you want ??

Regards.
0
 

Author Comment

by:cgruber
ID: 40369762
Well at the moment when I try to connect to the server via SSH using putty.exe, as soon as I type in the username (root) a popup appears saying.

"Disconnected: No supported authentication methods available (server sent: gssapi-with-mic)"
0
 
LVL 13

Expert Comment

by:Sandy
ID: 40370068
paste your ssh config file

TY/SA
0
Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

 

Author Comment

by:cgruber
ID: 40370133
shh or sshd?
0
 
LVL 13

Expert Comment

by:Sandy
ID: 40370136
sshd_config
0
 
LVL 37

Expert Comment

by:Gerwin Jansen, EE MVE
ID: 40370286
@cgruber - Always keep one session open to a server that you're changing the ssh config for. That way you can test the new configuration using a second session and rollback if the change isn't working.

Add this to your ssh config file:

PasswordAuthentication yes
0
 
LVL 13

Expert Comment

by:Sandy
ID: 40370289
agree with GJ

TY/SA
0
 
LVL 28

Expert Comment

by:serialband
ID: 40372000
Why don't you just use a key?  It's not that difficult to create and use.  If you're using putty, you can run pagent.exe and load your key until the next reboot.
0
 

Accepted Solution

by:
cgruber earned 0 total points
ID: 40407442
Anyone can help at all?
0
 
LVL 13

Expert Comment

by:Sandy
ID: 40407806
What you have done seems correct.. Now please tell us what exactly the help you are looking at ?


TY/SA
0
 
LVL 28

Expert Comment

by:serialband
ID: 40411545
What other entries are in your sshd_config?  The default settings allow for both password and passphrase access.  This suggests that you have an entry that disables access.
0
 

Author Closing Comment

by:cgruber
ID: 40459259
Deleted config file and re-created. Set Pubkeyauthentication to No and it works now.
0

Featured Post

Enterprise Mobility and BYOD For Dummies

Like “For Dummies” books, you can read this in whatever order you choose and learn about mobility and BYOD; and how to put a competitive mobile infrastructure in place. Developed for SMBs and large enterprises alike, you will find helpful use cases, planning, and implementation.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Setting up Two Three NICs with One on a Different Subnet 22 77
High Bandwidth Usage 6 56
mcrypt_create_iv() is deprecated 4 153
AWS Central Authentication 1 61
Java performance on Solaris - Managing CPUs There are various resource controls in operating system which directly/indirectly influence the performance of application. one of the most important resource controls is "CPU".   In a multithreaded…
Linux users are sometimes dumbfounded by the severe lack of documentation on a topic. Sometimes, the documentation is copious, but other times, you end up with some obscure "it varies depending on your distribution" over and over when searching for …
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…

772 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