Error Pam Permission Denied For
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Error Pam Pam_open_session Permission Denied
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Error Pam Authentication Failure For Root
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CentOS6.5 server with correct password. Issues related to configuring your network Post Reply Print view Search Advanced ssh permission denied centos search 6 posts • Page 1 of 1 shadeless Posts: 3 ssh permission denied root Joined: 2014/04/28 21:16:04 can't ssh into CentOS6.5 server with correct password. Quote Postby shadeless » 2014/04/29
Ssh Permission Denied Ubuntu
02:36:00 Hi all,I've been trying to solve this problem for a very long time and I now come to ask for help. I recently updated my server http://www.linuxquestions.org/questions/linux-software-2/no-longer-able-to-log-into-ssh-password-right-but-permission-denied-340680/ using yum update. Since then I haven't been able to ssh into the account. I know that I am entering the correct password since I use the same password to log in to the physical machine. If I do:Code: Select allssh -vg raphael@zwarg.physics.sunysb.edu
OpenSSH_6.6.1, OpenSSL 1.0.1g 7 Apr 2014
debug1: Reading configuration data http://www.centos.org/forums/viewtopic.php?t=46098 /etc/ssh/ssh_config
debug1: Connecting to zwarg.physics.sunysb.edu [129.49.61.216] port 22.
debug1: Connection established.
debug1: identity file /home/raphael/.ssh/id_rsa type -1
debug1: identity file /home/raphael/.ssh/id_rsa-cert type -1
debug1: identity file /home/raphael/.ssh/id_dsa type -1
debug1: identity file /home/raphael/.ssh/id_dsa-cert type -1
debug1: identity file /home/raphael/.ssh/id_ecdsa type -1
debug1: identity file /home/raphael/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/raphael/.ssh/id_ed25519 type -1
debug1: identity file /home/raphael/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3
debug1: match: OpenSSH_5.3 pat OpenSSH_5* compat 0x0c000000
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<3072<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA ae:59:0f:4e:55:ac:d5:d0:ab:42:27:3c:3d:8b:ba:d8
debug1: Host 'zwarg.physics.sunysb.edu' is known and matches the RSA host key.
debug1: Found key in /home/raphael/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1:
last updated September 13, 2007 in Howto, Linux, Linux login control, Networking, OpenBSD, RedHat/Fedora Linux, Security, Suse Linux, Sys admin, UNIX The idea is very simple you want to limit http://www.cyberciti.biz/tips/linux-pam-configuration-that-allows-or-deny-login-via-the-sshd-server.html who can use sshd based on a list of users. The text file contains a list of users that may not log in (or allowed to log in) using the SSH server. This is used for improving security.
PAM (Pluggable authentication modules) allows you to define flexible mechanism for authenticating users. My previous post demonstrated how to deny or allow users using permission denied sshd configuration option. However, if you want to block or deny a large number of users, use PAM configuration.A note for new sys adminsBackup all data and PAM configuration files before any modification :)Please be careful to perform the configuration option. Wrong configuration can lock down all login access including root access.Read this Linux-PAM configuration file syntax guideNow continue reading below for pam_listfile.so ssh permission denied configration…Use of pam_listfile.so moduleThis PAM module authenticates users based on the contents of a specified file. For example, if username exists in a file /etc/sshd/ssh.allow, sshd will grant login access.How do I configure pam_listfile.so module to deny access?You want to block a user, if user-name exists in a file /etc/sshd/sshd.deny file.Open /etc/pam.d/ssh (or /etc/pam.d/sshd for RedHat and friends) # vi /etc/pam.d/sshAppend following line: auth required pam_listfile.so item=user sense=deny file=/etc/sshd/sshd.deny onerr=succeedSave and close the fileNow add all usernames to /etc/sshd/sshd.deny file. Now a user is denied to login via sshd if they are listed in this file: # vi /etc/sshd/sshd.denyAppend username per line: user1user2
...Restart sshd service: # /etc/init.d/sshd restartUnderstanding the config directives:auth required pam_listfile.so : Name of module required while authenticating users.item=user : Check the usernamesense=deny : Deny user if existing in specified filefile=/etc/sshd/sshd.deny : Name of file which contains the list of user (one user per line)onerr=succeed : If an error is encountered PAM will return status PAM_SUCCESS.How do I configure pam_listfile.so module to allow access?You want to ALLOW a user to use ssh, if user-name exists in a file /etc/sshd/sshd.al