Problems with node

[Alexey]

@Kyshino

failed to dial storage node (ID: MY_NODE_ID) at address MY_DDNS:28967: rpc: dial tcp 81.0.38.42:28967: i/o timeout"

Clearly states that your node is not available from outside.
Please use this checklist to fix the issue:

My Node is OFFLINE for 2 hours

It should connect in seconds. There are a few things you should check. Start with checking the port. On https://www.yougetsignal.com/tools/open-ports/?port=28967 you can fill in the domain or IP you are using in the run command. Then check the port. If it’s closed, it could still be several things. Make sure the WAN IP you see in your router settings matches the IP shown on the above page. Make sure your port forward is set up correctly. That means no filter on incoming IPs, forwarding to th…

I personally think that your ISP either changed your external IP and your DDNS updater doesn’t work or your ISP placed you behind their NAT (CGNAT).

Also, maybe you forgot to confirm/extend your DDNS subscription. For example, noip.com requires to confirm your DDNS every month on free account.