Centos7 system security and application (iv) detecting weak password and NMAP scan

I. Detection weak password

1. The host of tools to mount to the virtual machine

2. Extract

3. Check the contents of the file decompression

4. Installation C C ++ Compiler

yum install gcc gcc-c++ -y

5. Compile

make linux-x84-64

6. Go to the folder will run a script john

7. execution of the script 

./john /etc/passwd /etc/shadow

8. the outcome

Two .NMAP scan

1. Install nmap

yum install nmap

2. Detection

nmap -sT 127.0.0.1

3. Add httpd service

Opening function, turn off the firewall

4. Use nmap scanning