Logging Monitoring

How to Configure Log Rotation with logrotate on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Log Rotation with logrotate on RHEL 8

Log files grow indefinitely unless something rotates and prunes them, which will eventually fill a disk and crash your services. On RHEL 8, logrotate is installed by default and handles rotation for most system logs out of the box via a systemd timer. For application logs your team manages, you need to write a custom […]

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Common Problems 121588

Fail2ban Blocking Trusted Internal Addresses

🟡 Medium   ⏱ 5–30 min  Last verified: 11 November 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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FreeBSD 12 — pypy — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — pypy — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Python — DoS via malformed XML-RPC / HTTP POST request Related CVEs: CVE-2012-0845 Upstream summary: Jan Lieskovsky reports, A denial of service flaw was found in the way Simple XML-RPC […]

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openSUSE Tumbleweed — libzip4 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libzip4 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2012-1162 CVE-2012-1163 Upstream summary: Heap-based buffer overflow in the _zip_readcdir function in zip_open.c in libzip 0.10 allows remote attackers to cause a denial of service […]

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Common Problems 118924

Ubuntu 14.04 LTS Boot Drops to initramfs Prompt

🟡 Medium   ⏱ 5–30 min  Last verified: 11 November 2019 📖 ~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 & Cross-Refs References & Further […]

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FreeBSD 12 — gitolite — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — gitolite — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: gitolite — path traversal vulnerability Related CVEs: CVE-2012-4506 Upstream summary: Sitaram Chamarty reports: I'm sorry to say there is a potential path traversal vulnerability in v3. Thanks to Stephane Chazelas […]

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How to Configure Consul for Service Discovery on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure Consul for Service Discovery on FreeBSD 12

Introduction How to Configure Consul for Service Discovery on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for […]

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FreeBSD 12 — fetchmail — multiple vulnerabilities (19 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — fetchmail — multiple vulnerabilities (19 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 11 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: fetchmail — potential crash when authenticating to SMTP server Related CVEs: CVE-2003-0792 CVE-2005-2335 CVE-2005-3088 CVE-2005-4348 CVE-2006-0321 CVE-2006-5867 CVE-2006-5974 CVE-2007-1558  +11 more Upstream summary: Matthias Andree reports: fetchmail's SMTP client, when […]

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SLES 15 — libbsd0 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libbsd0 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 11 November 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2020:1298-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-20367 Upstream summary: nlist.c in libbsd before 0.10.0 has an out-of-bounds read during a comparison for a symbol name from the string table (strtab). Table […]

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How to Deploy a Django App with Gunicorn on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Deploy a Django App with Gunicorn on FreeBSD 12

Introduction How to Deploy a Django App with Gunicorn on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf […]

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