What are the first three steps when securing a Linux server?

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What are your first three steps to secure Linux server?

7 steps to securing your Linux server

  1. Update your server. …
  2. Create a new privileged user account. …
  3. Upload your SSH key. …
  4. Secure SSH. …
  5. Enable a firewall. …
  6. Install Fail2ban. …
  7. Remove unused network-facing services. …
  8. 4 open source cloud security tools.

What are the steps to securing a Linux server?

How to secure your Linux server

  1. Only install required packages. …
  2. Disable the root login. …
  3. Configure 2FA. …
  4. Enforce good password hygiene. …
  5. Server-side antivirus software. …
  6. Update regularly or automatically. …
  7. Enable a firewall. …
  8. Backup your server.

What are your first three steps when securing a server?

Server Security in 3 Steps

  • Step 1 – Shut Down Access. As IT admins install appropriate software packages and applications onto servers, invariably ports are opened and services enabled. …
  • Step 2 – Patch Your Servers. …
  • Step 3 – Tightly Control User Access.

What are three levels of security in Linux?

There are three access types (read, write, execute) and three accessors: the user who owns it, the group that may have access to it, and all “other” users.

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How do you secure a server?

21 Server Security Tips to Secure Your Server

  1. Establish and Use a Secure Connection.
  2. Use SSH Keys Authentication.
  3. Secure File Transfer Protocol.
  4. Secure Sockets Layer Certificates.
  5. Use Private Networks and VPNs. Server User Management.
  6. Monitor Login Attempts.
  7. Manage Users. Server Password Security.
  8. Establish Password Requirements.

What is the most secure Linux distro?

10 Most Secured Linux Distros For Advanced Privacy & Security

  • 1| Alpine Linux.
  • 2| BlackArch Linux.
  • 3| Discreete Linux.
  • 4| IprediaOS.
  • 5| Kali Linux.
  • 6| Linux Kodachi.
  • 7| Qubes OS.
  • 8| Subgraph OS.

How do I protect my Ubuntu?

So here are five easy steps to enhance your Linux security.

  1. Choose Full Disk Encryption (FDE) No matter which operating system you are using, we recommend that you encrypt your entire hard disk. …
  2. Keep your software up-to-date. …
  3. Learn how to use Linux’s firewall. …
  4. Tighten up security in your browser. …
  5. Use anti-virus software.

What is SSH port?

SSH, also known as Secure Shell or Secure Socket Shell, is a network protocol that gives users, particularly system administrators, a secure way to access a computer over an unsecured network. … An SSH server, by default, listens on the standard Transmission Control Protocol (TCP) port 22.

What is the SSH protocol?

SSH or Secure Shell is a network communication protocol that enables two computers to communicate (c.f http or hypertext transfer protocol, which is the protocol used to transfer hypertext such as web pages) and share data.

How do you harden a server?

Checklist for Securing and Hardening your Server Environment

  1. Manage Server Access.
  2. Minimize the External Footprint.
  3. Patch Vulnerabilities.
  4. Minimize Attack Surface.
  5. Restrict Admin Access.
  6. Know What’s Happening.
  7. Minimize User Access Permissions.
  8. Establish Communications.
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Which of the following is a first step to make system more secure?

Change default usernames and passwords. Most, if not all devices, have default usernames and passwords that can easily be found by a child using a search engine. Default passwords should be changed immediately and even better is to also change, delete or disable the default username as well. Don’t share passwords.

How does TLS connection work?

How does TLS work? TLS uses a combination of symmetric and asymmetric cryptography, as this provides a good compromise between performance and security when transmitting data securely. … The session key is then used for encrypting the data transmitted by one party, and for decrypting the data received at the other end.

Can Linux be hacked?

Linux is an extremely popular operating system for hackers. … Malicious actors use Linux hacking tools to exploit vulnerabilities in Linux applications, software, and networks. This type of Linux hacking is done in order to gain unauthorized access to systems and steal data.

What are the 3 levels of file access?

For regular files, these 3 bits control read access, write access, and execute permission.

What are the three levels permission?

Each permission level has three types of permission; read, write and execute. Permission type defines what a user can do with a particular object.