January 2023

How to upgrade our perfect server based on Debian 10 (Buster) to Debian 11 (Bullseye) (page 3)

botond published 2023/01/31, k - 11:30 time
How to upgrade our perfect server based on Debian 10 (Buster) to Debian 11 (Bullseye) (page 3) | Linux portal
Another era has come again, when our Debian 10 (Buster) server has also run out of time, and it has become a burning task to do something about this problem. In this tutorial, we will upgrade a perfect Debian 10 (Buster) server to Debian 11 (Bullseye). On this page, we review the basic system as well as our higher-level server services and make the necessary subsequent settings.

How to upgrade our perfect server based on Debian 10 (Buster) to Debian 11 (Bullseye)

botond published 2023/01/31, k - 11:10 time
How to upgrade our perfect server based on Debian 10 (Buster) to Debian 11 (Bullseye) | Linux portal
Another era has come again, when our Debian 10 (Buster) server has also run out of time, and it has become a burning task to do something about this problem. In this tutorial, we will upgrade a perfect Debian 10 (Buster) server to Debian 11 (Bullseye). On this page, we review the necessary tasks before the update, which we use to prepare our system for the new main version.

Server monitoring with Monit on Debian and Ubuntu systems (page 2)

botond published March 2023, 01, Thu - 26:02 time
Server Monitoring with Monit on Debian and Ubuntu (Page 2) | Linux portal
Monit is a free and open source process and resource monitoring tool that can be used to monitor system processes and resources using a web browser and command line. Monit automatically stops or restarts processes or services if, for example, they use too many resources or behave abnormally. It also sends email alerts about various events.
On this page, we will perform some fine-tuning on an existing Monit instance (installed and configured by the ISPConfig automated installer) on a Debian 11 (Bullseye) perfect server to make it work properly for us.

Server monitoring with Monit on Debian and Ubuntu systems

botond published March 2023, 01, Thu - 26:02 time
Server monitoring with Monit on Debian and Ubuntu systems | Linux portal
Monit is a free and open source process and resource monitoring tool that can be used to monitor system processes and resources using a web browser and command line. Monit automatically stops or restarts processes or services if, for example, they use too many resources or behave abnormally. It also sends email alerts about various events.
On this page, we install the Monit system monitor program on a Debian 10 (Buster) perfect server version 1.1, where it was not used before, and then set it up.

How to set the default website on our ISPConfig server so that the Apache2 Debian Default page is not loaded when accessing the server's IP address or full hostname

botond published 2023/01/21, Sat - 00:20 time
How to set the default web page on our ISPConfig server so that the Apache2 Debian Default page is not loaded when accessing the server's IP address or full hostname | Linux portal
Our ISPConfig server handles our websites nicely, however, if we refer to the server's IP address or full hostname in the browser, we do not get the expected result, because in this case the Apache2 Debian Default Page is loaded, which is essentially Apache's "welcome" page. Of course, this is not a tragic mistake, but a beauty mistake. In this description, we will see how we can configure our Apache web server so that the website we want is loaded.

How to build and arming our ISPConfig3 server and how to secure our control panel, main services and websites with Let's Encrypt SSL (page 3)

botond published 2023/01/20, p - 23:19 time
How to build and provision our ISPConfig3 server and how to secure our control panel, main services and websites with Let's Encrypt SSL (page 3) | Linux portal
With the help of the ISPConfig control panel, we can easily manage the websites on our server, as well as other web services. In this description, we will review how to build and provision our ISPConfig3 server, as well as how to set up free SSL certificates issued by Let's Encrypt for the control panel, main services and our websites. On this page, we check the web services and other components running on the server, then we set up the Let's Encrypt SSL certificates for the control panel and the required services and websites. Finally, we perform a few more fine-tuning tasks and eliminate any problems that may arise.

How to build and arming our ISPConfig3 server and how to secure our control panel, main services and websites with Let's Encrypt SSL (page 2)

botond published 2023/01/20, p - 23:16 time
How to build and provision our ISPConfig3 server and how to secure our control panel, main services and websites with Let's Encrypt SSL (page 2) | Linux portal
With the help of the ISPConfig control panel, we can easily manage the websites on our server, as well as other web services. In this description, we will review how to build and provision our ISPConfig3 server, as well as how to set up free SSL certificates issued by Let's Encrypt for the control panel, main services and our websites. On this page, we create the primary web account and email account, then we use an external, free service to use secondary name servers, and finally we redirect the domain name to our server, making it accessible from the outside.

How to build and arming our ISPConfig3 server and how to secure our control panel, main services and websites with Let's Encrypt SSL

botond published 2023/01/20, p - 23:14 time
How to build and provision our ISPConfig3 server and secure our control panel, main services and websites with Let's Encrypt SSL | Linux portal
With the help of the ISPConfig control panel, we can easily manage the websites on our server, as well as other web services. In this description, we will review how to build and provision our ISPConfig3 server, as well as how to set up free SSL certificates issued by Let's Encrypt for the control panel, main services and our websites. On this page, we will install the basic system, the ISPConfig control panel with the necessary components, and then check the existing web interfaces and services.

PTR record

botond published March 2023, 01, Thu - 19:21 time
PTR Record | Linuxportal - Encyclopedia
DNS connects domain names (domain names) to IP addresses. The DNS PTR record, otherwise known as the pointer record, provides the domain name associated with the IP address. A DNS PTR record is the exact opposite of an "A" record, which specifies the IP address associated with a domain name.
When a user tries to access a domain name in their browser, a DNS lookup occurs in the background, where the system looks for the IP address associated with the domain name. And DNS PTR records are used in reverse DNS lookups, which is the exact opposite of the normal DNS lookup process: it's a query that starts with an IP address and finds the domain name associated with it.

HSTS (HTTP Strict Transport Security)

botond published 2023. 01. 09., h - 06:35 time
HSTS (HTTP Strict Transport Security) | Linuxportál - Encyclopedia
HSTS (HTTP Strict Transport Security) is a policy mechanism that helps protect websites from man-in-the-middle attacks, such as protocol downgrade or cookie hijacking. It allows websites to require web browsers (and other web client applications) to automatically only use HTTPS connections, which implement strong encryption using SSL/TLS. HSTS is a 2012 IETF standard defined in RFC 6797.