@edooze wrote:

Hi team.

I rebuilt my FreePBX server recently from the Distro but am unable to get public key authentication working.

I have set it up on other servers fine - one of which was a CentOS machine - but this one just isn’t accepting public/private key authentication.
Password Authentication works fine if I enable challenge/response.

Here is a coy of my sshd_config:

$OpenBSD: sshd_config,v 1.100 2016/08/15 12:32:04 naddy Exp $

This is the sshd server system-wide configuration file. See

sshd_config(5) for more information.

This sshd was compiled with PATH=/usr/local/bin:/usr/bin

The strategy used for options in the default sshd_config shipped with

OpenSSH is to specify options with their default value where

possible, but leave them commented. Uncommented options override the

default value.

If you want to change the port on a SELinux system, you have to tell

SELinux about this change.

semanage port -a -t ssh_port_t -p tcp #PORTNUMBER

Port 22
AddressFamily inet
ListenAddress myipv4
#ListenAddress ::

HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key

Ciphers and keying

#RekeyLimit default none

Logging

#SyslogFacility AUTH
SyslogFacility AUTHPRIV
#LogLevel INFO

Authentication:

LoginGraceTime 30s
PermitRootLogin no
StrictModes yes
#MaxAuthTries 6
#MaxSessions 10

PubkeyAuthentication yes
RSAAuthentication yes
AllowUsers myusername

The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2

but this is overridden so installations will only check .ssh/authorized_keys

AuthorizedKeysFile %h/.ssh/authorized_keys

#AuthorizedPrincipalsFile none

#AuthorizedKeysCommand none
#AuthorizedKeysCommandUser nobody

For this to work you will also need host keys in /etc/ssh/ssh_known_hosts

#HostbasedAuthentication no

Change to yes if you don’t trust ~/.ssh/known_hosts for

HostbasedAuthentication

#IgnoreUserKnownHosts no

Don’t read the user’s ~/.rhosts and ~/.shosts files

#IgnoreRhosts yes

To disable tunneled clear text passwords, change to no here!

PasswordAuthentication no
PermitEmptyPasswords no

Change to no to disable s/key passwords

ChallengeResponseAuthentication no

Kerberos options

#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no
#KerberosUseKuserok yes

GSSAPI options

#GSSAPIAuthentication yes
#GSSAPICleanupCredentials no
#GSSAPIStrictAcceptorCheck yes
#GSSAPIKeyExchange no
#GSSAPIEnablek5users no

Set this to ‘yes’ to enable PAM authentication, account processing,

and session processing. If this is enabled, PAM authentication will

be allowed through the ChallengeResponseAuthentication and

PasswordAuthentication. Depending on your PAM configuration,

PAM authentication via ChallengeResponseAuthentication may bypass

the setting of “PermitRootLogin without-password”.

If you just want the PAM account and session checks to run without

PAM authentication, then enable this but set PasswordAuthentication

and ChallengeResponseAuthentication to ‘no’.

WARNING: ‘UsePAM no’ is not supported in Red Hat Enterprise Linux and may cause several

problems.

UsePAM yes

#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PermitTTY yes
PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation sandbox
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#ShowPatchLevel no
UseDNS no
#PidFile /var/run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none
#VersionAddendum none

no default banner path

#Banner none

Accept locale-related environment variables

AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
AcceptEnv XMODIFIERS

override default of no subsystems

Subsystem sftp /usr/libexec/openssh/sftp-server

Example of overriding settings on a per-user basis

#Match User anoncvs

X11Forwarding no

AllowTcpForwarding no

PermitTTY no

ForceCommand cvs server

Thanks for any help.

Edit: I don’t know what the crazy formatting is about, I just tried to quote the file.

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