Install Security Software

Recently, some computer settings have always been changed. Is it hacked. Don't worry, just scan it yourself. So I searched a lot of tools online and installed the following software:

I. Nessus

Nessusd (Nessus) 5.0.2 [Build r23205] For Linux
(C) 1998-2012 tenable network security, Inc.

Processing the Nessus plugins...
[####################################### ##########]

All plugins loaded

-You can start nessusd by typing/etc/init. d/nessusd start
-Then go to https: // Ubuntu: 8834/to configure your restart

 

Ii. NMAP
NMAP is developed to allow system administrators to check which hosts and services are running on a large network system. It supports multiple protocols such as UDP, TCP connect (), tcp syn (half open), FTP Proxy (Bounce Attack), reverse-Ident, ICMP (Ping sweep), FIN, ack sweep, Xmas tree, Syn sweep, and null scan. You can view the details in the scan types section. NMAP also provides some practical functions, such as identifying the operating system type, secretly scanning, dynamic latency and retransmission, parallel scanning, detecting subordinate hosts through parallel Ping, spoofing scanning, port filtering detection, direct RPC scanning, distributed scanning, flexible target selection, and port description.

 

Iii. tcpdump
The system's built-in installation does not know how to use it. You have to learn for a while.