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How To Upgrade to Ubuntu 18.04 Bionic Beaver — step-by-step Linux tutorial on Progressive Robot

How To Upgrade to Ubuntu 18.04 Bionic Beaver

<$>[warning] Warning: As with almost any upgrade between major releases of an operating system, this process carries an inherent risk of failure, data loss, or broken software configuration. Comprehensive backups and extensive testing are strongly advised. To avoid…

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FreeBSD 12 — py39-kerberos — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py39-kerberos — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 16 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-kerberos — DoS and MitM vulnerabilities Related CVEs: CVE-2015-3206 Upstream summary: macosforgebot reports: The checkPassword function in python-kerberos does not authenticate the KDC it attempts to communicate with, which allows […]

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Cómo instalar y configurar Postfix en Ubuntu 18.04. — step-by-step Linux tutorial on Progressive Robot

Cómo instalar y configurar Postfix en Ubuntu 18.04.

Postfix es un popular agente de transferencia de correo (MTA) de código abierto que puede usarse para dirigir y entregar correo electrónico en un sistema Linux. Se estima que alrededor del 25 % de los servidores de correo público de Internet cuentan con Postfix. En esta…

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How to Configure QoS Policies on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure QoS Policies on Windows Server 2016

How to Set Up Windows Server 2016 QoS Policies Quality of Service (QoS) policies in Windows Server 2016 allow administrators to prioritize network traffic based on application, protocol, port, or IP address. By assigning different traffic classes specific bandwidth allocations and priorities, QoS prevents low-priority traffic from consuming bandwidth at the expense of business-critical applications. […]

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FreeBSD 12 — linux_base-c — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — linux_base-c — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 16 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: glibc — getaddrinfo stack-based buffer overflow Related CVEs: CVE-2014-6271 CVE-2014-7169 CVE-2015-0235 CVE-2015-7547 Upstream summary: Fabio Olive Leite reports: A stack-based buffer overflow was found in libresolv when invoked from nss_dns, […]

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How to Configure Suricata IDS/IPS on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure Suricata IDS/IPS on RHEL 7

How to Configure Suricata IDS/IPS on RHEL 7 Suricata is a high-performance, open-source network threat detection engine maintained by the Open Information Security Foundation (OISF). It can operate as an Intrusion Detection System (IDS), passively monitoring traffic and alerting on suspicious patterns, or as an Intrusion Prevention System (IPS), actively blocking malicious connections using the […]

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Common Problems 121621

Debian 9 – unattended-upgrades Leaves Pending Reboot Drift – Controlled Patch Flow

🟡 Medium   ⏱ 5–30 min  Last verified: 15 September 2019 Affected versions: Debian 9 📖 ~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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