Certbot offers a variety of ways to validate your domain, fetch certificates, and automatically configure Apache and Nginx. In this tutorial, we’ll discuss Certbot’s standalone mode and how to use it to secure other types of services, such as a mail server or a message broker like RabbitMQ.
How to Set Up iSCSI Target Server on Windows Server 2012 R2 iSCSI (Internet Small Computer Systems Interface) is a storage networking protocol that enables block-level storage access over a standard TCP/IP network. Windows Server 2012 R2 includes a built-in iSCSI Target Server role service that allows you to create and manage iSCSI targets — […]
🟢 Low ⏱ 5–15 min Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: nfsen — remote command execution Upstream summary: Peter Haag reports: A remote attacker with access to the web interface to execute arbitrary commands on the host operating system. Table of […]
Nginx is a powerful web server and reverse proxy that is used to serve many of the most popular sites in the world. In this guide, we’ll demonstrate how to update Nginx in place, without losing client connections. Before beginning this guide, you should…
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read • Source: Ubuntu Security Notice USN-4038-3 Related CVEs: https://launchpad.net/bugs/1834494 CVE-2016-3189 CVE-2019-12900 Upstream summary: USN-4038-1 fixed a vulnerability in bzip2. The update introduced a regression causing bzip2 to incorrect raises CRC errors for some files. We […]
In this tutorial, you will learn how to inspect the existing alerts, create new ones, and then configure AlertManager to send notifications via Slack.
🟢 Low ⏱ 5–15 min Last verified: 25 May 2026 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read • Source: Ubuntu Security Notice USN-4586-2 Related CVEs: CVE-2019-11037 Upstream summary: USN-4586-1 fixed vulnerabilities in PHP ImageMagick. This update provides the corresponding update for Ubuntu 16.04 ESM. Original advisory details: It was discovered that PHP […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: SLES 15 📖 ~4 min read • Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2016-8685 CVE-2016-8686 CVE-2013-7437 CVE-2017-12067 Upstream summary: The findnext function in decompose.c in potrace 1.13 allows remote attackers to cause a denial of service (invalid memory […]
How to Configure Windows Server 2016 Multiprotocol Label Switching Multiprotocol Label Switching (MPLS) is a high-performance routing technique that directs data from one node to the next based on short path labels rather than long network addresses. It has traditionally been the domain of service provider networks, but with the evolution of software-defined networking (SDN), […]
The POODLE SSLv3 vulnerability is a security issue that affects all implementations of SSLv3. This vulnerability allows an attacker to decrypt messages sent using this protocol version by exploiting a weakness the way the padding of a message are checked. In this guide, we’ll explain how the vulnerability work, and tell you how to disable SSLv3 on some common services.
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