Creating bridge interface using nmcli

Recenly I got confused setting up VLAN and deliver it to my virtualization server(s). I pretty sure my VLAN configuration was working fine and double check the logic is working. I have 10 (Ten) KVM Host, 9 nine of them was properly connected to networks (bridged interface(s)) and the other is having problem because of the bridge interface won’t up.

Fixing VLC flickering on AMD Graphic Cards

Couple days ago, I’ve been update my Fedora Core 25 to latest Fedora Core 26. Got some adjustment and improvement there, also got new (bugs?) errors regarding my dedicated graphic cards. From lspci reports, I am using Radeon HD 8670A/8670M/8690M / R5 M330 / M430 graphic cards on Lenovo G40-80 notebook.

How to deploy and migrating to IPv6

Since I (accidentally) work as Network Administrator, I always curios with IPv6 and how to deliver it to customer (especially my own device). But please keep in mind, you need up-to-date firmware and network device (router, switch, wireless radio(s)) and another equipment to do this.

Taking network monitoring to the next level

As system engineer and part-time network engineer, I am responsible to make sure all system are running and the network properly connected (24/7/365).Now, I will write about a project came from RIPE NCC, called RIPE Atlas. RIPE Atlas is a global network of probes that measure Internet connectivity and reachability, providing an unprecedented understanding of the state of the Internet in real time.

Building AKAMAI-like CDN using Amazon AWS with minimal budget

Based on Gartner Magic Quadrant (Aug) 2016, AWS still leader on cloud IaaS provider. And I’ve been using Amazon AWS since 2013 (S3 Bucket, Cloudfront, and Route53). The reason why I use that service only on Amazon AWS are, to optimize existing on premise infrastructure. The big challenge is to manage big assets (images) without downtime and data loss and of course using optimized resource.

Subnetting IPv6 Cheatsheet

Since IPv6 hype was launch several years ago, many people (incl. me) were struggling how to split IPv6 subnet correctly. Honestly, I wasn’t network engineer, but learning network fundamental is not a big deal (especially IPv6, nowadays, it’s a new protocol!). Since it was launch at 1990 (former IPNG), based on APNIC Labs Survey, the adoption of native IPv6 still low.

Creating optimized qcow2 files

Standard and default images create using virt-manager on linux, automatically full allocating specified disk size to host. To avoid un-usable disk space, you should avoid choosing default images created by virt-manager.

Google Brotli Compression [Theory & Implementation]

Brotli is a generic-purpose lossless compression algorithm that compresses data using a combination of a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling, with a compression ratio comparable to the best currently available general-purpose compression methods. It is similar in speed with deflate but offers more dense compression.

NGINX Amplify - Monitoring & Config Assistance

Beberapa hari yang lalu saya mendapatkan notifikasi dari NGINX mengenai launching product baru yang masih private beta. Apa itu NGINX Amplify? Di ambil dari halaman resmi-nya, “NGINX Amplify is a tool designed to monitor and optimize application delivery infrastructure. With Amplify it becomes possible to proactively analyze and fix problems related to running and scaling modern web applications”.

KeepAlive menggunakan metode Direct Routing

Saat ini saya ada project untuk konfigurasi Load Balancer dengan metode Direct Routing, atau yang biasa dikenal dengan DSR (Direct Server Return). Atau gambaran topologinya seperti ini.