11-05-2001
Quote:
Originally posted by dabrock
I found in some cases even with a .rhosts file on Red Hat that it was still prompting for user name and password which was a major problem for automated transfer programs that I needed to run rcp. If you are running into this problem you will need to add a file called <b>/etc/hosts.equiv</b> but this is not very secure. Much better to use ssh2 as suggested before.
Be very careful with /etc/hosts.equiv. It can be dangerous. You can use .rhosts and be somewhat exposed but you won't give the user access to ROOT on the box like you will with /etc/hosts.equiv!
I just want all to understand that /etc/hosts.equiv gives you EQUIVILENCY AS ROOT. In other words, you will have the same ability as root because that is what hosts.equiv gives you.
As much as I love .rhosts and ssh, try to steer clear of hosts.equiv files on your systems. One good reason for this is that someone could spoof as a trusted system that is in hosts.equiv file and gain access to your whole network and do some real damage to your company!
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LEARN ABOUT CENTOS
pam_rhosts
PAM_RHOSTS(8) Linux-PAM Manual PAM_RHOSTS(8)
NAME
pam_rhosts - The rhosts PAM module
SYNOPSIS
pam_rhosts.so
DESCRIPTION
This module performs the standard network authentication for services, as used by traditional implementations of rlogin and rsh etc.
The authentication mechanism of this module is based on the contents of two files; /etc/hosts.equiv (or and ~/.rhosts. Firstly, hosts
listed in the former file are treated as equivalent to the localhost. Secondly, entries in the user's own copy of the latter file is used
to map "remote-host remote-user" pairs to that user's account on the current host. Access is granted to the user if their host is present
in /etc/hosts.equiv and their remote account is identical to their local one, or if their remote account has an entry in their personal
configuration file.
The module authenticates a remote user (internally specified by the item PAM_RUSER connecting from the remote host (internally specified by
the item PAM_RHOST). Accordingly, for applications to be compatible this authentication module they must set these items prior to calling
pam_authenticate(). The module is not capable of independently probing the network connection for such information.
OPTIONS
debug
Print debug information.
silent
Don't print informative messages.
superuser=account
Handle account as root.
MODULE TYPES PROVIDED
Only the auth module type is provided.
RETURN VALUES
PAM_AUTH_ERR
The remote host, remote user name or the local user name couldn't be determined or access was denied by .rhosts file.
PAM_USER_UNKNOWN
User is not known to system.
EXAMPLES
To grant a remote user access by /etc/hosts.equiv or .rhosts for rsh add the following lines to /etc/pam.d/rsh:
#%PAM-1.0
#
auth required pam_rhosts.so
auth required pam_nologin.so
auth required pam_env.so
auth required pam_unix.so
SEE ALSO
rootok(3), hosts.equiv(5), rhosts(5), pam.conf(5), pam.d(5), pam(8)
AUTHOR
pam_rhosts was written by Thorsten Kukuk <kukuk@thkukuk.de>
Linux-PAM Manual 09/19/2013 PAM_RHOSTS(8)