Security scan perspectives

​Internal and external vulnerability scan is likely to provide different results. This because internal scan has more access to systems and network resources than external scan.

External scan will be often restricted by devices like firewalls. Only specific hosts and only specific network traffic will be allowed through firewall. This is said assuming that a network person knows what needs to be done.

External security scan is a good validation that this work was performed well.

It is not needed to perform full scale network security scan to determine if network ports that should be closed are open. Port scan, which is less intensive will report if network ports had been opened when they had to be closed or restricted.

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