How to find applications with NetFlow
Kentik
JANUARY 24, 2022
You can also learn about the protocols in use, the ports being used, the top interfaces, etc. Source port for UDP or TCP, 0 for other protocols. Destination port for UDP or TCP, type and code for ICMP, or 0 for other protocols. Don’t rely on ports. It’s pretty much impossible to block HTTP and HTTPS ports at the firewall.
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