“Authentication Failed” connecting to Linux PC using NoMachine on Windows

[dlaurad]

Would really appreciate some help!

I’m running into “Authentication Failed” problem even when my username and password are correct when trying connecting to my Linux computer from my Windows device. I have tried the

sudo cp /etc/pam.d/nx /etc/pam.d/nx.ori

sudo cp /etc/pam.d/sshd /etc/pam.d/nx

method wrote by previous forums

However, when running the second line sudo cp /etc/pam.d/sshd /etc/pam.d/nx,I somehow get cp: cannot stat '/etc/pam.d/sshd': No such file or directory

Unfortunately I don’t understand the whole NX PAM configuration thing, so I was hoping if anyone could give me more detailed explanation on how to fix this problem?

Also here is my /var/log/auth.log output:

$ sudo grep -r "nxexec" /var/log/auth.log

Jun 24 16:30:12 nnnnn sudo: nnn : TTY=pts/0 ; PWD=/etc/pam.d ; USER=root ; COMMAND=/usr/bin/grep -r nxexec /var/log/auth.log

Jun 24 16:39:14 nnnnn nxexec: pam_unix(nx:auth): check pass; user unknown

Jun 24 16:39:14 nnnnn nxexec: pam_unix(nx:auth): authentication failure; logname= uid=127 euid=0 tty= ruser= rhost=10.3.40.55

Jun 24 16:39:20 nnnnn nxexec: pam_unix(nx:auth): check pass; user unknown

Jun 24 16:39:20 nnnnn nxexec: pam_unix(nx:auth): authentication failure; logname= uid=127 euid=0 tty= ruser= rhost=10.3.40.55

Jun 24 16:39:33 nnnnn sudo: nnn : TTY=pts/0 ; PWD=/etc/pam.d ; USER=root ; COMMAND=/usr/bin/grep -r nxexec /var/log/auth.log

Jun 24 16:52:26 nnnnn sudo: nnn : TTY=pts/0 ; PWD=/etc/pam.d ; USER=root ; COMMAND=/usr/bin/grep -r nxexec /var/log/auth.log

 

[Britgirl]

System users authentication doesn’t work on systems with pam.d placed in a different location than /etc/pam.d.

It looks like you have the same issue which was reported a while back by another user. The problem is not in NoMachine, but the fact that you have pam.d iconfig files in two places in your OS. (https://kb.nomachine.com/TR02R09538)

As a workaround, link pam.d to /etc/ directory before installing NoMachine:

sudo ln -s /usr/share/defaults/etc/pam.d /etc/pam.d

or add manually nx and nxlimits files to pam.d directory (/usr/share/defaults/etc/pam.d):

cat /usr/share/defaults/etc/pam.d/nx
auth       include       su
account    include       su
password   include       su
session    include       su

cat /usr/share/defaults/etc/pam.d/nxlimits
session   optional pam_limits.so

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