So I have a pi-hole, a printer center and a vpn server running, and I have port 20-1200 forwarded. I was just checking the pi-hole web page and saw dhcp.stls.mo.charter.com had over 20k requests, It seems like its trying to connect to the server. I looked it up that charter.com is just spectrum which is my internet provider. I have ssh password login disabled but since I'm new to server stuff and don't know much about internet security, I don't know if there will be any potential threat.