SSH Reference Manual
ALLOWEDAUTHENTICATIONS 
Use this parameter to specify the authentication mechanisms that are allowed for system users that are automatically 
added to the SSHCTL database upon first login. 
Parameter Syntax 
ALLOWEDAUTHENTICATIONS (method[,method,...]) 
Arguments 
 method 
Specifies an SSH authentication method to be allowed. Valid values are… 
o  password 
Password for the NonStop system's authentication mechanism. The password is validated against the 
SYSTEM-USER's password. 
o  publickey 
Public key authentication using the PUBLIC-KEYs configured for this user. 
o  keyboard-interactive 
Authentication according to RFC 4256 mapped to the standard GUARDIAN user authentication dialog 
verifying the SYSTEM-USER’s password. 
o  gssapi-with-mic 
GSSAPI user authentication in accordance with the RFC 4462 standard. Including this method will also 
enable “gssapi-keyex” authentication, if the initial key exchange was performed over GSSAPI. See section 
"Single Sign-on with GSSAPI Authentication
" for further details. 
Default 
If omitted, ALLOWEDAUTHENTICATIONS will be set to (keyboard-interactive,password,publickey). 
Considerations 
•  ALLOWEDAUTHENTICATIONS is only relevant if AUTOADDSYSTEMUSERS
 is set to TRUE. 
•  ALLOWEDAUTHENTICATIONS will not override any list of authentication methods explicitly configured 
for a user (using SSHCOM ADD USER or ALTER USER). 
Example 
ALLOWEDAUTHENTICATIONS (keyboard-interactive,publickey) 
See also 
AUTOADDSYSTEMUSERS
ALLOWEDSUBSYSTEMS 
This parameter can be used to globally restrict the SSH user settings to those subsystems listed in the value for 
ALLOWEDSUBSYSTEMS, which is a comma separated list of subsystem names. If a subsystem is not mentioned in 
both this global list and the SSH user's attribute ALLOWED-SUBSYSTEMS, then the incoming subsystem request will 
be denied.  
Parameter Syntax 
ALLOWEDSUBSYSTEMS subsystem[,subsystem,...] 
Double quotes are required when setting the parameter via PARAM and more than one subsystem is listed: 
PARAM ALLOWEDSUBSYSTEMS "sftp,tacl" 
54 • Configuring and Running SSH2  HP NonStop SSH Reference Manual 










