External Vulnerability Scan Preparation and Explanation
Our external vulnerability scan starts with an NMAP tcp and udp port scan on every port. We then use OpenVAS to test for vulnerabilities on open ports. Some firewalls will have IPS or other security methods that protect against port scanning. Check with the client to make sure that these security measures are turned off or accomodations to allow our server to scan the firewall are in place to get the best results.