I want to accomplish “port scanning”, or testing the firewalling between zones. I want to see what is open between zones, at layers 3 and 4 of OSI. I don’t want to use NMAP. Would the “Discovery” scan config achieve this? I’m not looking for a full vulnerability scan.
I’m trying out the config now. I have another question. Will your config tell me what ports are open on the firewall, even if there is no host behind the firewall listening or responding on that port? I want to see what the firewall is allowing through, even if there is no host with that IP address behind it.
Is there a way to achieve this in GCS? The Discovery Scan provides Info about ICMP Pings and such but is there a easy way to get a list of all Hosts and their open ports?