Ssh – How to to avoid “Port 22: Connection refused” error on SSH port (22)

connectionconnection-refuseddebianopenvpnssh

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??

Best Answer

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
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