This website’s hosting is provided by my friend and very first supporter of my work, Debosmit Majumder.
As an IT and networking enthusiast, I am intrigued about all aspects of computer networking and network engineering and work full time as a network engineer.
I am also grateful to have had the opportunity to share some of my knowledge and insights through my writing via the APNIC blog for which I was included in their Top 3 ‘How to’ posts in 2021 with my article “Edge router and BNG optimization”. Also found it pretty cool to have had my IPv6/NDP article covered by Packet Pushers in this podcast.
In addition to my day job, I also selectively (occasionally) offer consultancy services to ISPs around the world, helping them implement best practices and optimise their configurations.
In my spare time, I enjoy sharing my knowledge and insights with others, and I publish a variety of networking-related content on this site for Telcos and ISPs. I also enjoy photography and music, and I am the proud operator of my own network (AS149794).
I am always open to new opportunities and connections with those who share my passion for computer networking.
January 2021 – September 2023
- Operating AS149794 for non-profit R&D.
- Collaborating with orgs that are interested in non-profit R&D to benefit the internet community.
Selectively providing consultancy services to ISPs such as:
- Deploying CGNAT with best practices.
- Firewalling and bogon filtering.
- Architecting and deploying IPv6.
- Implementing best practices for MTU.
- Assisted in deploying new technology such as Docker.
- Encourage operators to aim for symmetric routing and topology when feasible.
- Encouraging up-to-date IRR information for best practices.
- In contact with folks at Telcos and various ISPs, pushing best practices towards them directly too.
A heartfelt shoutout to Wido den Hollander (former MD/CTO of cldin) who gave me the opportunity and served as my technical mentor during my time at the company, from whom I learnt a great deal on best practices for networking from both operational and business standpoint, ranging from network architecture to handling of maintenance, fire fighting and dealing with layer 8 problems.
- Everything is IPv6-first at AS48635.
- Designed and implemented a new IPv6 architecture from scratch.
- Troubleshoot and resolved complex network issues in a multivendor environment.
- Worked with a variety of vendors, including Juniper, Arista, Cumulus Linux, Cisco, MikroTik, and Ubuntu/FRR.
- Implemented security best practices and modernised the out-of-band network.
- Handled some network documentation
- Worked closely with other teams for inter-team disciplinary related works.
- Contributed to the development of the company’s network strategy.
- Improved network efficiency and performance by implementing best practices and relevant RFCs.
- Conducted a technical workshop on MikroTik-specific implementation(s).
May 2021 – June 2022
Technical Support Engineer | Civo Ltd.
- Frontline Support (L1).
- Direct interaction with the customers, either via Intercom or the Civo public Slack community.
- Basic diagnostic and preliminary checks for the issues reported by the customers.
- Escalate issues to the appropriate team where and whenever required.
- Work hand-in-hand with other support staff for trickier and more complex issues.
- Set up RFC8805 (Geofeeds) for Civo’s Prefixes.
November 2020 – January 2021
Intern | SkyBroadband Services, Shillong
Big thanks to Varun Singhania for giving me the opportunity
My contributions were:
- Assisted in deploying RFC4638 which enabled customers to push 1500 MTU over PPPoE thereby eliminating packet fragmentation and improving overall network performance.
- Assisted in identifying security flaw in RADIUS configuration that allowed anyone outside the local network to login the web dashboard of any user’s account.
- Assisted in discovering an MTU negotiation issue with certain make/model of ONT devices that prevented jumbo frames from being transmitted.