https://networkappers.com/tools/open-port-checker
https://www.yougetsignal.com/tools/open-ports/
https://networkappers.com/tools/open-port-checker
https://www.yougetsignal.com/tools/open-ports/
This is a great guide to iptables:
https://azure.microsoft.com/en-us/services/azure-migrate/
https://azure.microsoft.com/en-us/resources/videos/migration-with-azure-migrate/
https://youtube.com/watch?v=RlwdWiE1rZ4