DNS

BIND (Berkeley Internet Name Domain)

botond published 2024/01/20, Sat - 07:18 time
Introducing the BIND (Berkeley Internet Name Domain) entry in the encyclopedia | Linux portal
The Linux-based BIND (Berkeley Internet Name Domain) server is the most widespread and well-known DNS (Domain Name System) software, which is a key part of the basic infrastructure of the Internet. BIND's development began at the University of Berkeley in the late 1980s, and since then it has undergone many developments to meet today's challenges. As a DNS server, BIND's main task is to translate human-readable domain names (e.g. www.pelda.hu) to IP addresses (e.g. 192.168.1.1), thus enabling Internet users to easily navigate the web. However, BIND's role is much more complex and critical than that; ensures the smooth operation of the domain name system, which is essential for the stability and security of the Internet.

How to fix "554 5.7.1 Service unavailable; Client host blocked using zen.spamhaus.org; Error: open resolver;" from our server delivery of bounced letters with an error message?

botond published Jan. 2023, 03, 22:11 p.m. time
How to fix "554 5.7.1 Service unavailable; Client host blocked using zen.spamhaus.org; Error: open resolver;" from our server delivery of bounced letters with an error message? | Linux portal
When conducting electronic correspondence, mail servers strive to filter out unsolicited mail (spam) as efficiently as possible. From time to time it happens that these spam filtering services get blocked by letters that do not contain anything that would justify this. Therefore, it may happen with us that we cannot send an email to a recipient, or that we cannot receive mail from others on our own server. In this description, we will investigate one of the more common server-side "554 5.7.1 Service unavailable; Client host blocked using zen.spamhaus.org; Error: open resolver;" type error.

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.

Perfect Server: Debian 10 (Buster) V1.0 (Page 2)

botond published March 2020, 01, Thu - 02:17 time
Perfect server: Debian 10 (Buster) V1.0 (page 2) | Linux Portal
In this tutorial, we build the perfect Debian 10 (Buster) server version 1.0, which we build on the previous Debian 10 (Buster) LAMP server. This page installs the following components: FTP server, Quota, BIND DNS server, web statistics, Jailkit, Fail2Ban and UFW firewall.

Perfect server: Debian 9 (stretch) V1.0 (page 3)

botond published 2019. 01. 21., h - 17:56 time
Perfect Server: Debian 9 (Stretch) V1.0 (page 3) | Linux Portal
On the third page of this tutorial, we continue to build the perfect 9 version of Debian 1.0 (Stretch) by installing the following components: Quota quota system, BIND DNS server, Webalizer, AWstats web statistics, Jailkit, Fail2Ban and UFW firewall
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