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Top Forums UNIX for Advanced & Expert Users How to allow particular user only to login as a root using "ssh" ? Post 302447455 by citaylor on Monday 23rd of August 2010 08:41:47 AM
Old 08-23-2010
What O/S are you running ? If it is Linux or Solaris (others may provide the same functionality) then you may be able to tweak the pam.conf to provide this functionality. (see pam_succeed_if.so and pam_deny.so for info)
 

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pam_deny(5)						Standards, Environments, and Macros					       pam_deny(5)

NAME
pam_deny - PAM authentication, account, session and password management PAM module to deny operations SYNOPSIS
pam_deny.so.1 DESCRIPTION
The pam_deny module implements all the PAM service module functions and returns the module type default failure return code for all calls. The following options are interpreted: debug syslog(3C) debugging information at the LOG_AUTH|LOG_DEBUG levels ERRORS
The following error codes are returned: PAM_ACCT_EXPIRED If pam_sm_acct_mgmt is called. PAM_AUTH_ERR If pam_sm_authenticate is called. PAM_AUTHOK_ERR If pam_sm_chauthtok is called. PAM_CRED_ERR If pam_sm_setcred is called. PAM_SESSION_ERR If pam_sm_open_session or pam_sm_close_session is called. EXAMPLES
Example 1 Disallowing ssh none authentication sshd-none auth requisite pam_deny.so.1 sshd-none account requisite pam_deny.so.1 sshd-none session requisite pam_deny.so.1 sshd-none password requisite pam_deny.so.1 Example 2 Disallowing any service not explicitly defined other auth requisite pam_deny.so.1 other account requisite pam_deny.so.1 other session requisite pam_deny.so.1 other password requisite pam_deny.so.1 ATTRIBUTES
See attributes(5) for a description of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT Level |MT-Safe with exceptions | +-----------------------------+-----------------------------+ SEE ALSO
su(1M), libpam(3LIB), pam(3PAM), pam_sm_authenticate(3PAM), syslog(3C), pam.conf(4), nsswitch.conf(4), attributes(5), pam_authtok_check(5), pam_authtok_get(5), pam_authtok_store(5), pam_dhkeys(5), pam_passwd_auth(5), pam_unix_account(5), pam_unix_auth(5), pam_unix_session(5), privileges(5) NOTES
The interfaces in libpam(3LIB) are MT-Safe only if each thread within the multi-threaded application uses its own PAM handle. The pam_deny module is intended to deny access to a specified service. The other service name may be used to deny access to services not explicitly specified. SunOS 5.11 16 Jun 2005 pam_deny(5)
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