These are my links for 21 set 2015 through 24 set 2015:
IOWait. (Sysadmin’s bedtime horror story) – […] hope this helps someone out there. The last 3 days, I have had my server crash on me every 2-3 hours. At first I thought it would be a spike in the traffic, since I couldn’t find any crash reports from Apache, and there was a spike in the traffic at this time. So I increased the resources on the server. It crashed again, every 2-3 hours […] It wasn't my case but… who knows in the future?
Home | Lattice – Lattice aspires to make clustering containers easy. Lattice includes a cluster scheduler, http load balancing, log aggregation and health management. Lattice containers can be long running or temporary tasks which get dynamically scaled and balanced across a cluster. Lattice packages components from Cloud Foundry to provide a cloud native platform for individual developers and small teams.
These are my links for 30 mar 2015 through 31 mar 2015:
5 easy tips to accelerate SSL – Unhandled expression – SSL is slow. These cryptographic algorithms eat the CPU, there is too much traffic, it is too hard to deploy correctly. SSL is slow. Isn’t it? HELL NO! SSL looks slow, because you did not even try to optimize it! For that matter, I could say that HTTP is too verbose, XML web services are verbose too, and all this traffic makes the website slow. But, SSL can be optimized, as well as everything!
Cybrary – Free Online IT and Cyber Security Training, Forever! – Cybrary is a free and open source, online information technology (IT) and cyber security training environment for the world. We are dedicated to keeping the world’s IT professionals prepared for this ever changing industry and its technologies. You can learn almost anything IT and security related for free, and you can help others to do the same. Take a look at what you can learn: Systems Administration Network Administration Cyber Security Our free IT training classes include everything from industry certifications such as Certified Ethical Hacker, CISSP and CCNA to advanced niche skill sets like advanced penetration testing and cloud administration. Our training includes instructional lectures, interactive lab demonstrations, exam study guides, white papers, case studies and more. [ via https://delicious.com/farmando]
Exploit Exercises – exploit-exercises.com provides a variety of virtual machines, documentation and challenges that can be used to learn about a variety of computer security issues such as privilege escalation, vulnerability analysis, exploit development, debugging, reverse engineering, and general cyber security issues. [ via https://delicious.com/farmando ]
IT Security and Hacking knowledge base – SecDocs – Hacking and security documentation: slides, papers, video and audio recordings. All in high-quality, daily updated, avoiding security crap documents. Spreading hacking knowledge, for free, enjoy.
These are my links for 30 apr 2014 through 6 mag 2014:
Ralentir le débit de postfix pour wanadoo/orange – Le blog de Michauko – Si vous avez un serveur d’envoi de mails (je ne parle pas d’être un spammeur) et beaucoup d’abonnés chez Wanadoo et Orange, vous risquez fort le rejet temporaire de votre serveur si le débit d’envoi est trop fort. C’est ce qui m’est arrivé et hop, 5000 mails entassés dans la file de postfix.
smtp-in.orange.fr refused to talk to me: postfix solution | floriancrouzat.net – Orange sadly limits inbound connexion to it’s MX to 1 connexion per IP, which is a total pain in the ass when you try to deliver newsletter, or manage a MTA. Here is a sample log from their MX: Jul 4 10:42:42 smtp.example.com postfix/smtp: 0123456789: host smtp-in.orange.fr[184.108.40.206] refused to talk to me: 421 mwinf5c34 ME Trop de connexions, veuillez verifier votre configuration. Too many connections, slow down. OFR004_104  However, since they won’t change anything, we have to take mesures, here’s what you can do if you run postfix: you have to set a per-destination concurrency limit.
Tmux: A Simple Start – In all likelihood, you’ve probably already heard of tmux. However, you may not be using it everyday. If tmux is on your “Someday” list because you think it is too complicated (I mean, c’mon, the word “multiplexer” is just plain scary), then I am here to show you just how easy it is to put tmux into your workflow.
Tyblog | Yet Another Vim Setup – Vim is an excellent text editor. I’ve used it for many years and like most vim users, have collected a fairly large collection of settings in my .vimrc and learned how to grok my vim usage effectively through a lot of trial and error. To that end, I’ve tried to assemble a useful overview of my experience with vim.