It’s not a DNS or FTP server those are other types. I do not know what category blynk server falls under.
It runs on java and uses a custom TCP/IP protocol.
Static IP you must(preferably) set in your router, As I do not know how it looks on your specific router I can’t help you right now. You need the MAC adress of your server PC aswell for the “identification”. Poke around your routers DCHP settings.
Static IP is a user choice, you can use the current one by opening command prompt and writing ipconfig /all
look for physical adress, that is your MAC
look for IPv4 address, that is your server pcs current local address
Your settings are wrong. Please try these and avoid misstyping, its port 443 not 433.