The advantage of using Firewall service on Ubuntu? What does it mean?
Firewall Service on Ubuntu
Firewall Service on Ubuntu is the first line of defense for your Ubuntu server. It blocks incoming network traffic from unwanted sources. This is the easiest way to protect your Ubuntu server and keep your data safe from prying eyes.
Ubuntu comes with UFW (Uncomplicated Firewall) service, which is an easy-to-use frontend for iptables firewall. You can configure UFW to block incoming traffic from other IP addresses. Prerequisites: A non-root user with sudo privileges set up on your system. An Ubuntu server with a non-root user with sudo privileges is set up on it.
Install Nmap on your Ubuntu server and Desktop System
Method 1: Installing Nmap using the apt-get command. The apt command allows us to install packages from a central repository using a single command. We can do this by using the following command: sudo apt-get update sudo apt-get install Nmap.
Method 2: Installing Nmap using PPA (Personal Package Archive). First of all update the APT package repositories cache: sudo apt-get update. Now adds the following PPA (Personal Package Archive).
This is for Ubuntu 14.04 LTS server or 16.04 LTS server or desktop systems: sudo add-apt-re is an important aspect of IT security. It helps to identify current security problems and future threats. Dedicated Internet Access (DIA) is the access to the Internet through a dedicated line.
Enabling DIA Service
Network security analysis is an important aspect of IT security. It helps to identify current security problems and future threats. To enable DIA service you must have a dedicated high bandwidth internet connection.
This is connected and configured on your server. You should ensure that your server is directly connected to the internet. If any intermediary devices may delay the traffic then it can cause issues for DIA service.
Also, make sure that you have only one internet connection on your server.
Dedicated Internet Access (DIA)
Network security analysis is the process of scanning the network traffic. This is to detect network attacks and vulnerabilities. So, it is a very important process for organizations that want to secure their network against threats.
Nmap can scan both IPv4 and IPv6 networks, so you can use it on both your local area network (LAN) and wide area network (WAN). So, this utility can operate on all popular operating systems. This includes Windows, Linux, Mac OS X, BSD, Solaris, HP-UX, AIX, and more.
Moreover, Nmap is an open source tool that allows us to discover hosts and services on a computer network. Also, it allows us to detect any security issues or vulnerabilities that might affect our system. So, you can use this tool while auditing your system or during penetration testing activities in your organization.
Nmap uses raw IP packets in novel ways to determine what hosts are available on the network and what services (application name and version). Since those hosts are offering, what operating systems (and OS versions) they are running. Also, check what type of packet filters/firewalls are in use, and dozens of other characteristics.