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Top Forums UNIX for Advanced & Expert Users Ssh public/private key user login problem Post 303029835 by bash_in_my_head on Friday 1st of February 2019 01:08:59 PM
Old 02-01-2019
Ssh public/private key user login problem

I have a user account configuration with ssh public/private key that works on multiple servers centos and rhel. One server (Server F) that is not working in centos 6.8. When i ssh into server f I get prompted for a password. I have verified the config and it all is good. I put sshd into debug mode on server f on port 2200. when I ssh into server f on port 2200 i drop into a shell with no password prompt. Port 22 on server f accepts other user logins all with a password. There are no iptables firewall rules on server f. I have dug through the logs and am not spotting any indications as to why I cant login without a password.
Any ideas?

Server F
Code:
openssh-server-5.3p1-123.el6_9.x86_64
CentOS release 6.8 (Final)

server f
Code:
drwx------. 2 admin admin 4096 Feb  1 17:13 .ssh
-rw-------. 1 admin admin  440 Feb  1 17:13 authorized_keys


Moderator's Comments:
Mod Comment Please use CODE tags as required by forum rules!

Last edited by RudiC; 02-01-2019 at 03:37 PM.. Reason: Added CODE tags.
 

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KTUTIL(8)						    BSD System Manager's Manual 						 KTUTIL(8)

NAME
ktutil -- manage Kerberos keytabs SYNOPSIS
ktutil [-k keytab | --keytab=keytab] [-v | --verbose] [--version] [-h | --help] command [args] DESCRIPTION
ktutil is a program for managing keytabs. Supported options: -v, --verbose Verbose output. command can be one of the following: add [-p principal] [--principal=principal] [-V kvno] [--kvno=kvno] [-e enctype] [--enctype=enctype] [-w password] [--password=password] [-r] [--random] [-s] [--no-salt] [-H] [--hex] Adds a key to the keytab. Options that are not specified will be prompted for. This requires that you know the password or the hex key of the principal to add; if what you really want is to add a new principal to the keytab, you should consider the get command, which talks to the kadmin server. change [-r realm] [--realm=realm] [--a host] [--admin-server=host] [--s port] [--server-port=port] Update one or several keys to new versions. By default, use the admin server for the realm of a keytab entry. Otherwise it will use the values specified by the options. If no principals are given, all the ones in the keytab are updated. copy keytab-src keytab-dest Copies all the entries from keytab-src to keytab-dest. get [-p admin principal] [--principal=admin principal] [-e enctype] [--enctypes=enctype] [-r realm] [--realm=realm] [-a admin server] [--admin-server=admin server] [-s server port] [--server-port=server port] principal ... For each principal, generate a new key for it (creating it if it doesn't already exist), and put that key in the keytab. If no realm is specified, the realm to operate on is taken from the first principal. list [--keys] [--timestamp] List the keys stored in the keytab. remove [-p principal] [--principal=principal] [-V -kvno] [--kvno=kvno] [-e -enctype] [--enctype=enctype] Removes the specified key or keys. Not specifying a kvno removes keys with any version number. Not specifying an enctype removes keys of any type. rename from-principal to-principal Renames all entries in the keytab that match the from-principal to to-principal. purge [--age=age] Removes all old versions of a key for which there is a newer version that is at least age (default one week) old. SEE ALSO
kadmin(8) HEIMDAL
April 14, 2005 HEIMDAL
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