While trying to do ssh without password, rsa key file is created as empty.
Hi
i have aix 5.3 operating system, and i am trying to do ssh without passwd, when i tried to create a rsakey, it produces empty file as an output, how can solve that problem? why it is giving empty output file, i tried with different user, situation same,.i have restarted sshd server. .ssh permission is 700.
is there any idea?
Hi,
I am using a remote storage service for backing up our data - we want to have a script run as part of a cron job which would do the backups from our local Linux machine to the service's Linux machine.
I want to use tar and ssh to do this (rather than mounting the disk and using cp) .... (5 Replies)
I am trying to SFTP to a couple sites. One has an RSA-KEY that was sent to me. Currently I am running that manually using WinSCP. I would like to set it up as a CRON process on our Linux host (Sun).
Can I use the rsa-key they sent me in any directory or does it need to be placed in a specific... (2 Replies)
Dear All,
I need to decrypt with private key most of the time and this works for RSA. At times I need to decrypt with public key (data is encrypted with private key). This does not seem to work via VB.Net. Is there support for such an activity in Java on Linux or Windows ? Please advise.
... (3 Replies)
While trying to upgrade ssh from v4.7 to v5.0 on AIX 5.3 TL9, I end up with the following error.
Has anyone come across this?
Note: openssl has been upgraded to 0.9.8.840 before this upgrade
Bala (0 Replies)
Hello, here is my problem:
I have 20 machines that need to SSH into 1 machine throughout the day. The issue is every time I go through the process of putting my keys from one of the computers that needs to SSH to the server that needs to accept all the incoming SSH's it overrides the last one.
... (6 Replies)
We have RSA SecureID softtoken key generator on my Windows machine.
It generates new keys every 1 minute.
Any HPUX server (be it ServerD or ServerP) requires my ID and the randomly generated RSA SecureID softtoken key from my Windows to login.
I login to ServerD.
Then I run a script... (0 Replies)
Hello,
I'm trying to perform these operations without entering any password, as user "fzd":fzd@machine1> scp /tmp/srcFile1 fzd@machine2:/tmp/$destFile
fzd@machine1> scp fzd@machine2:/tmp/$srcFile /tmp/$destFilebut alsofzd@machine1> scp /tmp/srcFile1 machine2:/tmp/$destFile
fzd@machine1> scp... (6 Replies)
Hi All,
I have a scenario where from machine1 I need to establish sftp/ssh to machine2.
Internet is full of examples of this how to generate they key-pair etc... but all examples assume that the account is the same on machine1 and machine2.
I would like to do the following:
1) user1 on... (3 Replies)
Discussion started by: snailrider
3 Replies
LEARN ABOUT SUSE
ssh-keyscan
SSH-KEYSCAN(1) BSD General Commands Manual SSH-KEYSCAN(1)NAME
ssh-keyscan -- gather ssh public keys
SYNOPSIS
ssh-keyscan [-46Hv] [-f file] [-p port] [-T timeout] [-t type] [host | addrlist namelist] ...
DESCRIPTION
ssh-keyscan is a utility for gathering the public ssh host keys of a number of hosts. It was designed to aid in building and verifying
ssh_known_hosts files. ssh-keyscan provides a minimal interface suitable for use by shell and perl scripts.
ssh-keyscan uses non-blocking socket I/O to contact as many hosts as possible in parallel, so it is very efficient. The keys from a domain
of 1,000 hosts can be collected in tens of seconds, even when some of those hosts are down or do not run ssh. For scanning, one does not
need login access to the machines that are being scanned, nor does the scanning process involve any encryption.
The options are as follows:
-4 Forces ssh-keyscan to use IPv4 addresses only.
-6 Forces ssh-keyscan to use IPv6 addresses only.
-f file
Read hosts or addrlist namelist pairs from this file, one per line. If - is supplied instead of a filename, ssh-keyscan will read
hosts or addrlist namelist pairs from the standard input.
-H Hash all hostnames and addresses in the output. Hashed names may be used normally by ssh and sshd, but they do not reveal identify-
ing information should the file's contents be disclosed.
-p port
Port to connect to on the remote host.
-T timeout
Set the timeout for connection attempts. If timeout seconds have elapsed since a connection was initiated to a host or since the
last time anything was read from that host, then the connection is closed and the host in question considered unavailable. Default
is 5 seconds.
-t type
Specifies the type of the key to fetch from the scanned hosts. The possible values are ``rsa1'' for protocol version 1 and ``rsa''
or ``dsa'' for protocol version 2. Multiple values may be specified by separating them with commas. The default is ``rsa''.
-v Verbose mode. Causes ssh-keyscan to print debugging messages about its progress.
SECURITY
If an ssh_known_hosts file is constructed using ssh-keyscan without verifying the keys, users will be vulnerable to man in the middle
attacks. On the other hand, if the security model allows such a risk, ssh-keyscan can help in the detection of tampered keyfiles or man in
the middle attacks which have begun after the ssh_known_hosts file was created.
FILES
Input format:
1.2.3.4,1.2.4.4 name.my.domain,name,n.my.domain,n,1.2.3.4,1.2.4.4
Output format for rsa1 keys:
host-or-namelist bits exponent modulus
Output format for rsa and dsa keys:
host-or-namelist keytype base64-encoded-key
Where keytype is either ``ssh-rsa'' or ``ssh-dss''.
/etc/ssh/ssh_known_hosts
EXAMPLES
Print the rsa host key for machine hostname:
$ ssh-keyscan hostname
Find all hosts from the file ssh_hosts which have new or different keys from those in the sorted file ssh_known_hosts:
$ ssh-keyscan -t rsa,dsa -f ssh_hosts |
sort -u - ssh_known_hosts | diff ssh_known_hosts -
SEE ALSO ssh(1), sshd(8)AUTHORS
David Mazieres <dm@lcs.mit.edu> wrote the initial version, and Wayne Davison <wayned@users.sourceforge.net> added support for protocol ver-
sion 2.
BUGS
It generates "Connection closed by remote host" messages on the consoles of all the machines it scans if the server is older than version
2.9. This is because it opens a connection to the ssh port, reads the public key, and drops the connection as soon as it gets the key.
BSD January 9, 2010 BSD