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Ssh Learning
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vivanguarda
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Joined: 01 May 2009
Posts: 98

PostPosted: Sat Oct 08, 2011 4:09 am    Post subject: Ssh Learning Reply with quote

Good Evening!!!

I am reading about ssh remote uses, but I don't get a sucessfully way to do it yet. At home, I am using a default slack13.37 machine and trying access my office sms server. It 's nat rules and no firewall.

At first, on slack, I don't get to start ssh, but:

nmap localhost
Starting Nmap 5.51 ( http://nmap.org ) at 2011-10-07 20:34 BRT
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000010s latency).
Not shown: 996 closed ports
PORT STATE SERVICE
22/tcp open ssh
37/tcp open time
113/tcp open auth
631/tcp open ipp



And when I try ssh to Sms server...
ssh 201.37.1.100 -l root -p 22

there is a very long time to respond.


Also, there is another problem when restart sshd
chmod +x /etc/rc.d/rc.sshd
/etc/rc.d/rc.sshd restart


Could not load host key: /etc/ssh/ssh_host_rsa_key


Is this key a part of ssh Sms daemon?
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gerasimos_h
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Joined: 09 Aug 2007
Posts: 1753
Location: Greece

PostPosted: Sat Oct 08, 2011 6:54 am    Post subject: Reply with quote

If you look at /etc/rc.d/rc.sshd you will see
Code:
sshd_start() {
  # Create host keys if needed.
  if [ ! -r /etc/ssh/ssh_host_key ]; then
    /usr/bin/ssh-keygen -t rsa1 -f /etc/ssh/ssh_host_key -N ''
  fi
  if [ ! -f /etc/ssh/ssh_host_dsa_key ]; then
    /usr/bin/ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key -N ''
  fi
  if [ ! -f /etc/ssh/ssh_host_rsa_key ]; then
    /usr/bin/ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key -N ''
  fi
  if [ ! -f /etc/ssh/ssh_host_ecdsa_key ]; then
    /usr/bin/ssh-keygen -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -N ''
  fi
  /usr/sbin/sshd
}

So every time it starts, it create those keys.

The long time to respond it's a DNS issue, add your SMS box in /etc/hosts on your office machine and your office machine in /etc/hosts on SMS.
A dyndns account solves tis issue.

gerasimos_h

_________________
Superb! Mini Server Project Manager
http://sms.it-ccs.com
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