What is the default number of host discovery TCP ports?
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Then, what is the default number of host discovery TCP ports in Qualys?
Notice, the default is 1900 ports. However, you can run a full 65,535 TCP port scan, or configure the service to just scan on one port. This will influence what vulnerabilities are discovered during the assessment portion of the scan.
Beside above, how many TCP ports are targeted when using the full scan option? Ports 80 and 88 are scanned by default even if you clear all port options in the Map and Additional sections of the option profile. The scanner sends a TCP SYN packet (with the port as the destination port) as well as TCP ACK and TCP SYN+ACK packets.
Furthermore, what is the default port used by Nessus to run?
What is a host discovery scan?
Example: Host Discovery. Launch a host discovery scan to see what hosts are on your network , and associated information such as IP address, FQDN, operating systems, and open ports, if available . After you have a list of hosts, you can choose what hosts you want to target in a specific vulnerability scan.