1、first you shold download the nessus on the web station

the nessus download site url:  https://www.tenable.com/downloads/nessus

and then you wiil find de file of nessus inyou location. ,use the command to unpack the package of nessus,   as follow my system bit is 64 so I downlaod this version

and then use the commands dpkg -i and finally use the commands /etc/init.d/nessusd start  to open the nessus ,and then you will find this srcreen ,so you should createaccount before you install the nessus

my nessus account is  YaLong you can  get the active code and start the nessus

you get the activation code nessus home ,

because Nesssus required Company email account ,but i not .so we can selected the free version only for home ,cna only scan you local home.the we shut down the nessus and use the command " /etc/init.d/nessusd stop。

after indtall the plung。we can use it to scan  the web vulnerability but it only for home  not for business

2、use  the Scapy to find the live port

first let's we see the default configuration use function display()   ，we can decide the  ARP()=another

arp_request=ARP()

and then use the arp_request.pdst()  to define the target ip address

for example "  arp_request=ARP()     arp_request.pdst="192.168.2.2"    then you use the command sr1(arp_request)

also can use the brife command  sr1(ARP(pdst="192.168.2.2"))

and then set the toimeout    ,you can use the command   sr1(ARP(pdst="192.168.2.2" ,timeout=1))