2020 - Page 651 of 735

How to Configure Edge Transport Server for Email on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Edge Transport Server for Email on Windows Server 2019

Overview of Edge Transport Server for Email An Edge Transport server sits in the DMZ between the internet and your internal Exchange organization. It handles inbound and outbound SMTP, anti-spam filtering, antivirus scanning, address rewriting, and connector configuration without being a domain member, thereby limiting what an attacker gains if the edge server is compromised. […]

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Oracle Linux 8 — perl-File-Find-Rule — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — perl-File-Find-Rule — vulnerability — patch and remediation guide (ELSA-2025-9605)

🟠 High   ⏱ 15–60 min  Last verified: 12 February 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-9605 Related CVEs: CVE-2011-10007 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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How to Set Up a VPN Server with StrongSwan IPsec on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up a VPN Server with StrongSwan IPsec on RHEL 7

How to Set Up a VPN Server with StrongSwan IPsec on RHEL 7 A Virtual Private Network (VPN) allows remote users and branch offices to securely connect to your corporate network over the public internet. StrongSwan is a robust, open-source IPsec-based VPN solution that supports IKEv2, the modern and recommended key-exchange protocol for road-warrior configurations. […]

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A Deep Dive into Iptables and Netfilter Architecture — step-by-step Security tutorial on Progressive Robot

A Deep Dive into Iptables and Netfilter Architecture

Firewalls are an important tool that can be configured to protect your servers and infrastructure. In the Linux ecosystem, iptables is a widely used firewall tool that interfaces with the kernel’s netfilter packet filtering framework. For users and administrators who…

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Common Problems 121114

Debian 10: kubelet not starting due to cgroup driver mismatch

🟠 High   ⏱ 5–30 min  Last verified: 11 February 2020 Affected versions: Debian 10 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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FreeBSD 12 — postfix-current — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — postfix-current — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 February 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Postfix — memory corruption vulnerability Related CVEs: CVE-2011-0411 CVE-2011-1720 Upstream summary: The Postfix SMTP server has a memory corruption error, when the Cyrus SASL library is used with authentication mechanisms […]

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How to Install Redis on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Install Redis on SLES 12

Introduction This tutorial covers How to Install Redis on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Step 1 — Install Redis zypper install -y redis Step 2 — Enable […]

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FreeBSD 12 — ja-groff — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — ja-groff — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 February 2020 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: groff — pic2graph and eqn2graph are vulnerable to symlink attack through temporary files Related CVEs: CVE-2004-0969 CVE-2004-1296 Upstream summary: The eqn2graph and pic2graph scripts in groff 1.18.1 allow local users […]

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