I have already disabled root login over the ssh by modifying /etc/ssh/sshd_config.
But how would i disable root login on a server itself.
We have implemented LDAP in our environment and our security guide states that root login must be obtained by first logging into the host using his/her own regular userid then gaining root privileges by using the SU.
After Configuring a brand new netraT1, It appears, the only way you can log in as root is throught the Serial Port (console). I believe there is a file in /etc which can be edited to allow root to access login via other methods
eg: telnet, ssh, etc.
My Question:
Which file contains... (2 Replies)
We have quite a few threads about this subject. I have collected some of them and arranged them by the OS which is primarily discussed in the thread. That is because the exact procedure depends on the OS involved. What's more, since you often need to interact with the boot process, the... (0 Replies)
Hi, yesterday, I changed root's shell in /etc/passwd, cause a mistake then I can not log in root account (can't find correct shell). I attempted to log in single-mode, however, it prompted for single-mode's password then I type root's password but still can not log in.
I'm using AIX 5L version 5.2... (2 Replies)
I edited my /etc/default/login file and commented the line:
# If CONSOLE is set, root can only login on that device.
# Comment this line out to allow remote login by root.
#
#CONSOLE=/dev/console
I still cant login thru telnet or ssh.
What else do i have to do to be able to login... (14 Replies)
I am able to disable direct root login through telnet. But when I add the rlogin = false into the /etc/security/user file. I am unable to log in as root from ssh. I uncommented the "PermitRootLogin yes" in the sshd_config file. Still can't log in. Can anyone help? (0 Replies)
Hi Guys....
I am a newbie to unix. I have a requirement. I have a server. I have to configure ssh to disable direct root login and then add a user with sudo access to this server.Then change the ssh port to 22315 and the server should permit the ssh only from my local machine ip.I also have to... (1 Reply)
Q1
I want to allow particular user only to login into root using ssh.
I have set PermitRootLogin no for security purpose but I want to allow some of
the users to login as a root using ssh how to do this?
I have tried with Allowusers user1 user2 its working for only the user1 and... (3 Replies)
how to login with ssh to remote system with out applying the remote root/user password
with rlogin we can ujse .rhosts file
but with ssh howits possible
plz guide (2 Replies)
I have disabled rlogin for root successfully , but after that i could not login to root from console and could not su to root from other users as it responded as expired account
I did not have any admin user but I have managed to recover the situation by accessing rootvg before mounting it, but... (5 Replies)
I access over 100 SUSE SLES servers as root from my admin server, via ssh sessions using ssh keys, so I don't have to enter a password. My SUSE Admin server is setup in the following manner:
1) Remote root access is turned off in the sshd_config file.
2) I am the only user of this admin... (6 Replies)
Discussion started by: dvbell
6 Replies
LEARN ABOUT OPENDARWIN
ssh-keysign
ssh-keysign(1M)ssh-keysign(1M)NAME
ssh-keysign - ssh helper program for host-based authentication
SYNOPSIS
ssh-keysign
ssh-keysign is used by ssh(1) to access the local host keys and generate the digital signature required during host-based authentication
with SSH protocol version 2. This signature is of data that includes, among other items, the name of the client host and the name of the
client user.
ssh-keysign is disabled by default and can be enabled only in the global client configuration file /etc/ssh/ssh_config by setting Host-
basedAuthentication to yes.
ssh-keysign is not intended to be invoked by the user, but from ssh. See ssh(1) and sshd(1M) for more information about host-based authen-
tication.
/etc/ssh/ssh_config
Controls whether ssh-keysign is enabled.
/etc/ssh/ssh_host_dsa_key
/etc/ssh/ssh_host_rsa_key
These files contain the private parts of the host keys used to generate the digital signature. They should be owned by root, readable
only by root, and not accessible to others. Because they are readable only by root, ssh-keysign must be set-uid root if host-based
authentication is used.
ssh-keysign will not sign host-based authentication data under the following conditions:
o If the HostbasedAuthentication client configuration parameter is not set to yes in /etc/ssh/ssh_config. This setting cannot be overri-
den in users' ~/.ssh/ssh_config files.
o If the client hostname and username in /etc/ssh/ssh_config do not match the canonical hostname of the client where ssh-keysign is
invoked and the name of the user invoking ssh-keysign.
In spite of ssh-keysign's restrictions on the contents of the host-based authentication data, there remains the ability of users to use it
as an avenue for obtaining the client's private host keys. For this reason host-based authentication is turned off by default.
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWsshu |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
ssh(1), sshd(1M), ssh_config(4), attributes(5)AUTHORS
Markus Friedl, markus@openbsd.org
HISTORY
ssh-keysign first appeared in Ox 3.2.
9 Jun 2004 ssh-keysign(1M)