Cant connect to my NGINX + Certboot starter, command journalctl -xe give me messages - UFW BLOCK and sshd: Invalid user "name" + ip + port

Hello I try to create https web server for my client for practic

Everything was working, but one day everything shut down and I saw server errors: 1 When I tried to access the page - 502 # Bad Gateway nginx/1.18.0 (Ubuntu)

2 When I entered the command “nginx” - 2.1 nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) 2.2 nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use) I tried entering the server address directly, specifying different ports, as well as killing existing processes and then running nginx, but it didn’t help…

3 The command “journalctl -xe” gives the following errors: 3.1 [UFW BLOCK] IN OUT MAC SRC DST LEN TOS PREC TTL ID PROTO SPT DPT WINDOW RES SYN URGP - I only listed the property names (keys) without their values. 3.2 machine sshd[19370]: Invalid user NAME from IP port PORT machine sshd[19370]: Received disconnect from IP port PORT:VAL: Bye Bye [preauth] machine sshd[19370]: Disconnected from invalid user NAME IP port PORT [preauth] It seems like someone is trying to connect to me ??? I haven’t given my IP address or any other means of connecting to me to anyone, so I use it only for development purposes.

I tried to create a completely new machine (server). I set everything up from scratch, it worked for 5 minutes, and then stopped.

What could be the problem? Thanks for any help

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