Clam AntiVirus — a package of antivirus software running on many operating systems.
Continue reading “Installing and using ClamAV antivirus”Category Archives: Security
Configuring Fail2Ban for Bind9
Suppose Fail2Ban is already installed, if not, then see my article – Installing and Configuring Fail2ban.
By default, Bind9 does not write logs, so open its configuration file in any text editor:
Continue reading “Configuring Fail2Ban for Bind9”How to find iPhone from a computer?
To see from the computer where the iPhone is located:
Continue reading “How to find iPhone from a computer?”Installing Certbot in Ubuntu
On the test I will install ACME client Certbot in Ubuntu 16.04 (xenial), which will help to get Free SSL certificates Let’s Encrypt for 90 days and automatically update them.
For other versions of Ubuntu, the Certbot client is installed similarly.
Installing and Configuring Let’s Encrypt SSL
On the test I will install Let’s Encrypt which allows you to install free SSL certificates for 90 days and automatically re-issue them.
Continue reading “Installing and Configuring Let’s Encrypt SSL”Removing exploits from Ubiquiti devices
Once I noticed the spread of the virus/exploit on the network with Ubiquiti devices. Exploit using a vulnerability in older versions of firmware copied itself to other devices and from them attacked the following.
Continue reading “Removing exploits from Ubiquiti devices”Installing and Configuring Fail2ban
In this article, I will provide an example of how to install and configure Fail2ban.
Continue reading “Installing and Configuring Fail2ban”Configuring Fail2Ban for ProFTPd
Suppose Fail2Ban is already installed, if not, then see my article – Installing and Configuring Fail2ban.
In Fail2Ban by default, there are already filters for ProFTPd and it knows that the log file is located at /var/log/proftpd/proftpd.log, so it’s enough to create the file:
1 | sudo nano /etc/fail2ban/jail.d/proftpd.local |
And enter the data below, thereby activating the check of the log file /var/log/proftpd/proftpd.log:
1 2 3 | [proftpd] enabled = true bantime = 86400 |
Restart Fail2Ban to apply the changes:
1 | sudo service fail2ban restart |
You can check the status:
1 | sudo fail2ban-client status proftpd |
Installing Nessus on Linux
Nessus – vulnerability scanner in Linux.
Go to the official website http://www.tenable.com/products/nessus/select-your-operating-system and download Nessus for the operating system that you have installed.
Switch to the root user:
su
Run the installation of the downloaded file, for example:
1 | dpkg -i Nessus-7.0.2-debian6_amd64.deb |
Run Nessus:
1 | /etc/init.d/nessusd start |
After that, you can open Nessus in the browser by clicking https://IP:8834/
For further work, you need to register with https://www.tenable.com/products/nessus/activation-code.
Installing Snort in Ubuntu
Snort – Intrusion Prevention System (IPS) and Intrusion Detection System (IDS) by traffic analysis.
Continue reading “Installing Snort in Ubuntu”