3

I have a server where I just use openssh, openvpn and rabbitmq (which requires a lot of erlang dependencies).

Every time I reboot my server I can't access to it anymore getting

Port 22: Connection Refused

And I have to install everything from scratch.

What should I check to avoid this problem??

4

To view your firewall settings in a terminal perform the following: -

sudo iptables -L -n

you looking for somehting ike this

# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ssh
DROP       all  --  anywhere             anywhere

if no port ssh (22) rule is set then try:

sudo iptables -I INPUT -p tcp -m tcp --dport 22 -j ACCEPT

save current iptables firewall rules to a file called /root/dsl.fw, type:

# iptables-save > /root/dsl.fw

To restore iptables rules, enter:

iptables-restore < /root/dsl.fw

To restore rules automatically upon Linux system reboot add following command to your /etc/rc.local file, enter:

# vi /etc/rc.local

Append the line:

/sbin/iptables-restore < /root/dsl.fw

To check what init services are running and at what run level try this in a terminal

ls /etc/rc*.d

if sshd is not listed do then enter this in your terminal:

update-rc.d ssh enable
  • the last line is not working.. =/ – AAlvz Aug 22 '13 at 6:02
  • Type in terminal and post the results of dpkg --get-selections | grep ssh – AngryWombat Aug 22 '13 at 23:24
2

Port 22: Connection Refused

This message indicates that a firewall is actively blocking your connection attempt or alternatively that sshd is not listening on that port.

Verify that:

  1. The iptables rules applied on boot allow traffic on port 22
  2. sshd is set to start on boot
  • 2
    It may also mean the service is not running. – Michael Hampton Aug 21 '13 at 23:48
-3

Just try (as root)

sudo apt-get install ssh

i havn't ssh server in standard ubuntu desktop installation

  • 1
    While this might actually get one past the problem by reinstalling and restarting ssh, it's hardly a solution. One would be better served trying to find out why this is happening and prevent it from happening again. – yoonix Nov 6 '13 at 18:06

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