my xubuntu linux VPS is heavily customized, and recently it stopped receiving incoming network connections. TCPDUMP does see my incoming requests, but nothing else does.
I set SELinux to permissive, ran ufw disable, and ran dhclient. Systemctl status SSHD returns a running state with no errors, and when I run a NodeJS server, it doesn't see the connections either. When I ran tcpdump, it did see my incoming connections, but nothing else seems to see it.