Hi everyone, I host a server with few services running for my family and friends. The server freezes sometimes. Where the services stop responding. If I try to ssh into the server, it takes a lot of time (3 to 5 mins) for it to connect. After being connected, every letter I type takes 2 to 3 mins to appear on screen. Seems like the server is overloaded with tasks. But I am not sure what load it is running. I have netdata installed. I could pull up following screenshots for insights. Can someone please help me in troubleshooting the issue? I have tried testing stress testing my RAM and CPU, and they were fine. But I would start troubleshooting from scratch if you have recommendations for testings softwares. Please also let me know if there is anything I can pull from netdata to help in trouble shooting. System Specification:  System RAM  Disk I/O  Total CPU Utilization  Idle Jitter 

I am hosting few services for my friends and family on my server. Due to devices limitations, I can't install VPN on TVs etc. Is it possible to restrict the access to only those users that have a certificate issued by me?