How to create a SSL profile when you don't know the key passphrase

On F5 BigIP LTM you can create a SSL profile even if you don’t know the private key passphrase This workaround can be applied only if you’ve used the private key on the same F5 BigIP node already. In my case, I had to reuse the same cert+key from a server-ssl profile on a client-ssl profile. And because business was in a hurry and they didn’t have the private key anymore, I had to find alternative ways of making it work....

February 24, 2020 · 2 min · 307 words · costin

How to fix do-agent exited with a return code 100

So recently I’ve encountered the error in the subject. This came after 2 major changes (OS upgrade and PHP upgrade). So definitely it had to do with one of them. My money were on the first one. I’ve looked around on the internet and the only thing I could see was this old article that had no solution: So I knew I had to take the matters in my own hands....

February 16, 2020 · 4 min · 777 words · costin



May 22, 2018 · 1 min · word · costin

How to fix Microsoft Lync/Outlook has stopped working

Recently I had this issue that ate a big part of my day. Here’s how I fixed it. Firstly, some background info I’m using a Win 10 (Version 10.0.14393) OS with Office 2013 [15.0.4569.1503]. The previous day I’ve been prompted to restart my laptop to complete the new updates. I’ve left in a hurry and just closed the lid. The laptop didn’t close and I had to use the power button to stop it....

May 15, 2018 · 3 min · 523 words · costin

Networking training materials

I’ve stumbled upon this great list of materials you can use to get started on IT, and Networking in particular. I have to admit that some are new for me, even after being in this field for over 12 years. 2018-01-03 note, I’ve update the list with more resources /r/ITCareerQuestions Wiki /r/CSCareerQuestions Wiki /r/Sysadmin Wiki /r/Networking Wiki /r/NetSec Wiki /r/NetSecStudents Wiki Certifications IT Certification Road Map Cisco Training & certification Info Center Juniper Networks Certification Programs Microsoft Learning Info Center Red Hat Certification Info Center VMware Certification Info Center Microsoft Microsoft Learning Portal - Powered by EdX Microsoft Virtual Academy Microsoft MSDN Product Evaluation Center – Free Downloads Microsoft TechNet Product Evaluation Center – More Free Downloads Microsoft Azure Cloud Services Free Trial Center Microsoft Training Info Center Microsoft Ignite Training Convention Video Center Microsoft MSDN Video Training Portal Cisco / Networking Stanford University Free Intro to Networking Online Course Cisco Learning Center - How to Study for CCNA for Free Professor Messer’s CompTIA Network+ Training Videos Cybrary Free CCNA Training Videos Cisco VIRL - Virtual Router & Firewall Training Tool GNS3 Vault - Free Practice & Training Labs for Cisco Equipment Cisco Live Training Convention Video Portal - Free Registration Required Cisco Design Zone - Best Practices PacketBomb - WireShark Training Center NetCraftsmen - Network Consultants Blog PacketPushers News & Podcasts IOSHints - Ivan Pepelnjak’s Blog/site Cumulus Networks SDN Technical Videos SDX Central - SDN Resources Information/Computer/Network Security SANS Reading Room SANS Certifications BlackHat Conferences @ YouTube DEFCON Conferences @ YouTube RSA Conference @ YouTube Carnegie Mellon SoftEng Institute @ YouTube CMU’s Plaid Parliament of Pwning Competitive Hacking Team Blog Cybrary - Open Source Security Learning Krebs on Security blog Google’s Security Blog US CERT - Computer Emergency Response Team blog ISC^2 - CISSP - Certified Information Systems Security Professional Linux Resources Linux Foundation - Intro to Linux for Free Linux Foundation - Online Course Catalog - some free some paid DigitalOcean Linux Tutorials Docker Self-Paced Training USENIX Site Reliability Enginering Convention 2014 Presentations - Free USENIX Site Reliability Enginering Convention 2015 Presentations - Free USENIX Large Installation System Administration Conference 2014 Presentations - Free USENIX Large Installation System Administration Conference 2015 Presentations - Free PuppetConf Convention Videos 2014 - Free Registration Required PuppetConf Convention Videos 2015 - Free Registration Required ChefConf Convention Videos 2015 Ansible Video Resources - Including AnsibleFest Convention Videos SaltStack Video Resources VMware Resources VMWorld Convention Session Playback VMWare Hands-On-Labs Training Labs The Best of Cisco Live ^(Cisco Live is Cisco’s annual Technology expo & training convention....

December 11, 2017 · 4 min · 659 words · costin