HTTP/3.0 Reply from Google in Firefox Dev Console

Google Chrome started support HTTP/3.0 from the October 2020. Unlike the previous HTTP protocols, HTTP/3.0 uses UDP rather than TCP to avoid TCP Head of Line Blocking (HOL). This sample analysis was carried out during the Internet Society Sri Lanka Chapter webinar.

Download Link to Packet Capture:

You need Wireshark packet analyzer to do the analysis. Wireshark can be downloaded from here if you have not installed Wireshark yet. (Wireshark Download

Then open the Packet Capture file from Wireshark and Go to Statistics->Flow Graph on Wireshark.

Here is the flow of the traffic while accessing the


Secure Website Planning, Designing, Deployment & Maintenance

Websites are the most visible public font-end of an organization. Here are 25 Tips I presented at Internet Society Sri Lanka Chapter Webinar on 28th October 2020.

Presentation Access :

Tip 1 — Always go for a static content website over a dynamic website if there is no requirement.

Tip 2 — Refrain use of ActiveX components such as Adobe Flash, Java Applets and Microsoft Silverlight.

Tip 3 — Segregate you web components. Do not host payment gateways, email marketing solutions all together with corporate website in shared resources.

Tip 4 — Define a lifetime for the website. A…

LDAC is an audio coding technology developed by Sony. LDAC support up to 990kbps bandwidth and maximum bit depth and frequency of 96kHz/24bit. LDAC is supported by Sony Headsets like Sony WH-1000XM3, WH-XB900N/B, Sony Walkman, Sony Active Speakers and Sony Home Theaters systems.

LDAC vs SBC (Source:

In Linux distributions, Bluetooth SIG’s SBC and LC3 codecs are enabled out of the box. However to enable AAC, aptX-HD, LDAC separate propriety codec is needed be installed. From Android 8 Oreo, LDAC became a part of Android Open Source Project¹ . Then bluez-alsa and pulseaudio-modules-bt² packaged it. …

It is possible to save the git password/access tokens safely without plain text password savings or long caching times with using Gnome ‘Passwords and Keys’ also known as Seahorse in Linux. Here are the steps.

Step 1: Install Seahorse

# dnf install seahorse -y

Step 2: Install git-credential-libsecret

# dnf install git-credential-libsecret -y

Step 3: Set Git credential manager to Seahorse.

$ git config — global credential.helper /usr/libexec/git-core/git-credential-libsecret

Now the installation are done. With next git push, credentials will be saved to Seahorse. Seahorse will keep your passwords safe in operating system provided key store. I used Seahorse 3.36 which was provided with my Fedora 32.

The Seahorse About Dialog

The year 2020 is in the dawn with new hopes with the start of a new decade. This is a small look back on the websites from the perspective of information security for issues in the year 2019. Good, Bad and Ugly is an American idiomatic expression based on a movie released in 1966 (IMDB rating 8.8)¹. The respective phrases refer to upsides, downsides and the parts that could, or should have been done better, but were not.

Tip of the Iceberg — Numbers

Cybersecurity is a hot topic for news channels. However, it is not the priority always when there is a heavily political news…

My Asus laptop completed the 3 years without almost no troubles. My operating system is Fedora Linux and I usually do a fresh install when the new Fedora version is released which is every 6 months. With the fine-tuned partition table I was able to do every 6 months fresh installation with very low backing ups.

Why I switched to SSD —The Virtualization IO Problem

Before a couple of years, I used Windows XP virtual machines to run the software which not available for Linux on Oracle Virtual box. After Windows XP reaching the End of Life (EoL), I switched to Windows 7 guest VMs. Unlike XP, Win 7…

Kasun Chathuranga

InfoSec Engineer | Pokémon GO Player | Rocket Science Enthusiast

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