Firstly, always make sure to keep your system updated:
Centos:
Code:
Debian/Ubuntu:
Code:
---
Now install Nmap:
Centos:
Debian/Ubuntu:
---
Now we can Nmap localhost on either system:
Code:
You will now have a full TCP/UDP scan of your localhost system. Make sure to pay close attention to these ports now, services running on these ports need to be secured or use a firewall to block access.
Centos:
Code:
yum updateDebian/Ubuntu:
Code:
Code:
apt update
apt upgrade -y---
Now install Nmap:
Centos:
yum install nmapDebian/Ubuntu:
apt install nmap---
Now we can Nmap localhost on either system:
Code:
nmap -sU -sT -p0-65535 localhostYou will now have a full TCP/UDP scan of your localhost system. Make sure to pay close attention to these ports now, services running on these ports need to be secured or use a firewall to block access.
