IT, Cloud & DevOps Blog

How to Deploy an SDN Controller on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Deploy an SDN Controller on Windows Server 2016

How to Set Up Windows Server 2016 Software Defined Networking Controller The Network Controller is the cornerstone of the Software Defined Networking (SDN) solution in Windows Server 2016. It provides a centralised, programmable point of automation for managing, configuring, monitoring, and troubleshooting virtual and physical network infrastructure in your datacenter. Rather than configuring each network […]

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How To Install and Use Docker on Debian 9 — step-by-step Docker tutorial on Progressive Robot

How To Install and Use Docker on Debian 9

Docker is an application that simplifies the process of managing application processes in containers. In this tutorial, you’ll install and use Docker Community Edition (CE) on Debian 9. You’ll install Docker itself, work with containers and images, and push an image to a Docker Repository.

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FreeBSD 12 — dovecot — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — dovecot — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 23 June 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Dovecot — DoS Related CVEs: CVE-2008-4577 CVE-2008-4578 CVE-2009-3897 CVE-2011-1929 CVE-2017-15132 CVE-2017-2669 CVE-2019-10691 CVE-2019-11494  +12 more Upstream summary: Dovecot reports: A DoS is possible with a large number of address headers […]

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Common Problems 115060

Multipath device map missing on startup

🟡 Medium   ⏱ 5–30 min  Last verified: 22 June 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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How to Configure BGP Routing with BIRD on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure BGP Routing with BIRD on RHEL 7

How to Configure BGP Routing with BIRD on RHEL 7 Border Gateway Protocol (BGP) is the routing protocol that underpins the modern internet, enabling routers in different autonomous systems to exchange network reachability information. While large-scale BGP deployments typically run on dedicated hardware, Linux systems running RHEL 7 can participate in BGP routing using software […]

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IBM AIX 7.2 — CVE-2019-4681 — xss — patch and remediation guide — diagnosis and fix on IBM AIX 7.2

IBM AIX 7.2 — CVE-2019-4681 — xss — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 22 June 2019 Affected versions: IBM AIX 7.2 📖 ~4 min read  •  Source: NVD CVE-2019-4681, IBM Support Bulletin CVE: CVE-2019-4681 NVD summary: IBM Tivoli Netcool Impact 7.1.0.0 through 7.1.0.17 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web […]

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Common Problems 115052

RHEL 8 System Falls Into Emergency Mode Due to fstab Mistake

🔴 Critical   ⏱ 5–30 min  Last verified: 22 June 2019 Affected versions: 8.4 8.5 8.6 8.7 8.8 8.9 8.10 📖 ~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 […]

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openSUSE Tumbleweed — libcryptopp5_6 — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libcryptopp5_6 — vulnerability — 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-2015-2141 Upstream summary: The InvertibleRWFunction::CalculateInverse function in rw.cpp in libcrypt++ 5.6.2 does not properly blind private key operations for the Rabin-Williams digital signature algorithm, which […]

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