I am able to access my website but am unable to ping nor am I able to SSH.
I have always been able to SSH successfully until about 2 weeks back. Now I need to use to cloud console but I am unable to SSH.
I have restarted my droplet but to no avail.
I also have another droplet which I am able to SSH to successfully - so the problem is not in my local environment.
@hansen Thanks ...... I increased the RAM on the droplet to 4GB from 2GB, due to an unrelated reason, and now I am able to SSH !!! I have no idea why ???
That means you rebooted the droplet, which probably fixed some issue with SSH.
@puia
If you run this command, what does it show?
sudo iptables -L
And does a status of sshd say it's active (running)?
sudo systemctl status sshd
@puia Then you still have a firewall blocking ICMP. Run the following command to list all firewall rules:
sudo iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp dpt:222
ACCEPT tcp -- anywhere anywhere tcp dpt:http
ACCEPT tcp -- anywhere anywhere tcp dpt:https
DROP icmp -- anywhere anywhere icmp timestamp-request
DROP all -- anywhere anywhere
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
DROP icmp -- anywhere anywhere icmp timestamp-reply
You have specifically blocked ICMP pings with the two DROP icmp ...
Remove those and you will need to add something like this too:
iptables -A INPUT -p icmp --icmp-type echo-request -j ACCEPT