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This is the scenario; I use hping to perform my host
enumeration. I use select tcp and udp ports. This way I will potentially find
hosts behind firewalls. I then use nmap for service identification. I then feed
the nmap results into nessus using the nmap nasl wrapper. In the nessus config
I disabled all other port scanning options other than the nmap nasl wrapper. I
get back proper nessus results for hosts that are not behind a firewall. For
hosts that are behind a firewall I get back nothing from nessus. The report
says that the host is not even up???? If nmap comes back with port 80 and 22
open on a host that is behind a firewall, why would nessus come back with a blank
report that says the host is not alive? Why isn’t it running the port 80
and 22 pluggins against that host? Daniel Pinsky, CISSP, CCSE |
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