04-12-2009
Quote:
Originally Posted by
TonyFullerMalv
The article you mention:
Tells you to chmod the .ssh folder to 755, I'm fairly sure it has to be chmodded to 700 or else SSH will not work because the .ssh directory is world readable with a chmod of 755?
The "ssh -F /user/.ssh/ssh_config" means that the ssh command should use the ssh client configuration from the file specified rather then the default file in /etc/ssh or /usr/local/etc usually.
The ConnectTimeOut=5 is self explanatory (SSH will only wait for 5 (seconds?) before giving up trying to connect)
The $host will be a variable you set to specify which host to connect to, hostname will cause an error I think and is not required.
The best way to be able to SSH to 500 hosts without passwords is to have a common NFS mounted home directory with a .ssh folder under it with a authorized_keys file in it.
Once you get passwordless SSH to work passwordless SCP will also work.
Thanks TonyFullerMalv for the post.
I read documentation on internet.But none seems to give complete info.
Now i dont know what is this config file, while no tutorial on net discussed about config file.They just discussed about private and public keys
I would appreciate if any one can give a link to complete SSH setup with each and every file needed in the process.Or please point out some book
as i need to automate process to connect to 500 servers and pull some data.
Thanks
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LEARN ABOUT X11R4
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)