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Tech blog on web, security & embedded

December 6, 2024

Travelling to the land of the rising sun with Statime

At the beginning of October, David and I went to ISPCS in Tokyo. The ISPCS (IEEE Symposium on Precision Clock Synchronization) is all about the PTP protocol and related technologies, and we attended because of Statime, our Rust implementation of the Precision Time Protocol.

research statime timing pendulum

November 25, 2024

Manipulating time through (S)NTP

The NTP protocol is used by many devices to synchronize their system clocks. However, many devices use SNTP clients (Simple NTP) which are even more vulnerable to interference. As most (S)NTP packets are unauthenticated, they are vulnerable to spoofing, making it possible to change a device's time by manipulating (S)NTP packets.

In this blog, we discuss how (S)NTP packets can be forged to manipulate a device's system clock. Especially on the default SNTP client for many Linux systems, this turned out to be very easy. We will also dicuss the consequences of such attacks, as well as how these attacks can be prevented.

security timing pendulum

October 30, 2024

Enabling pools in NTS

We previously talked about how secure time is required for a safe internet. We mentioned how we want to increase the adoption of NTS, the secure time synchronization standard built on top of NTP. For this, we proposed to develop a public NTS pool. In this article, we expand on what pooling is, and what is required to enable an NTS pool.

open-source timing ntpd-rs pendulum

October 4, 2024

ISPCS paper: Estimating noise for clock-synchronizing Kalman filters

Our Statime project now provides strong synchronization performance and accurate synchronization error estimates without manual tuning for any specific hardware, because it automatically determines the main uncertainty parameters for a Kalman-based clock servo. This process is described in a scientific paper, soon to be published by the IEEE.

statime timing pendulum rust

July 8, 2024

Statime vs Linux PTP: Comparison of precision

As part of the development of our Precision Time Protocol implementation, Statime, we want to know how it performs compared to other implementations of PTP.

To figure this out, last April we visited VSL, the Dutch National Metrology Institute. There, we performed comparitive precision tests between Statime and Linux PTP.

algorithms timing pendulum rust

June 7, 2024

Authentication for PTP

PTP was originally designed for networks in which all devices were ultimately trusted. In version 1, no security mechanism was present, and version 2 only provided an experimental mechanism. However, with version 2.1 of the PTP standard (IEEE 1588-2019) there is now a normative security mechanism in section 16.14.

security timing pendulum

May 24, 2024

A safe Internet requires secure time

The internet has a hole at the bottom of its trust stack, and we need to do something about it. In particular, the internet needs secure time synchronization to fortify the security of our digital world. In this article, we present a path towards the adoption of securely synchronized time.

security timing ntpd-rs pendulum rust

December 19, 2023

Introducing ntpd-rs metrics

In Dutch we have a saying 'meten is weten', which translates to 'to measure is to know'. That sentiment is frequently overlooked in setting up computers and networks.

tools open-source timing ntpd-rs pendulum rust

December 8, 2023

Implementing NTPv5 in ntpd-rs

At Tweede golf, we are working on modern implementations of time synchronization protocols in Project Pendulum. The ntpd-rs project is part of it, and we've recently implementend the draft specification of NTPv5, for which we built a test server at IETF 118. This blogs covers the what, why and how (including a 'how to run').

open-source timing ntpd-rs pendulum

November 29, 2023

Pendulum long-term goals: usability and security (video)

I was invited by OCP-TAP to join them in their 87th Project Call to talk about Pendulum, our Rust implementations of NTP and PTP. The recording of this call on 8 Nov 2023 is now available.

statime timing ntpd-rs pendulum

November 20, 2023

ntpd-rs: Folkert explains the project (video)

At the GOSIM Conference in Shanghai, last September, I had the opportunity to talk about ntpd-rs, our project implementing the Network Time Protocol.

open-source ntpd-rs pendulum rust

November 8, 2023

Statime continues: Boundary Clocks and Master Ports

About one year ago, Tweede Golf announced "Statime", a Rust implementation of the Precision Time Protocol (PTP). The result of that first phase was a working proof of concept. Quite a bit has changed since then.

stm32 statime timing pendulum rust

October 17, 2023

First stable release of ntpd-rs

We're proud to announce that 5 October 2023 marked the first stable release of ntpd-rs!

open-source memory-safety ntpd-rs pendulum rust

August 10, 2023

Sovereign Tech Fund invests in Pendulum

Sovereign Tech Fund will support our effort to build modern and memory-safe implementations of the Network Time Protocol (NTP) and the Precision Time Protocol (PTP).

statime memory-safety timing ntpd-rs pendulum rust

July 19, 2023

Target practice: ntpd-rs on FreeBSD and other platforms

The latest release of ntpd-rs compiles on several new targets: the FreeBSD and macOS operating systems now work, and ntpd-rs now supports musl libc on Linux. The PRs adding support for these platforms are all community contributions, which is very exciting.

timing ntpd-rs pendulum rust

June 21, 2023

Report: NTP security audit

In March/April 2023 ntpd-rs underwent a security audit. The audit was executed by Radically Open Security and funded by NLnet Foundation. The audit did not uncover any major issues, but did help us make ntpd-rs more robust. It has been extremely valuable to have someone from outside of the development team look at the code in detail.

security timing ntpd-rs pendulum

May 30, 2023

ntpd-rs: NTP for the modern era (video)

At RustNL 2023, a Rust conference held in Amsterdam recently, I had the opportunity to talk about ntpd-rs, our project implementing the Network Time Protocol.

open-source timing ntpd-rs pendulum rust

April 25, 2023

Memory Safe Network Time (NTP) Has New Home, Seeks Early Adopters

This article is an adaptation of the original, published by Prossimo.

We're happy to announce that the Internet Security Research Group has officially made us the maintainers of the open-source memory-safe implementation of NTP, ntpd-rs. As such, we are now also looking for early adopters.

The implementation includes a server and client, as well as full support for Network Time Security (NTS), which brings encryption and greater integrity to time synchronization. Timing is precise and stable, as reflected by excellent performance in the NTP pool.

memory-safety timing ntpd-rs pendulum rust

December 16, 2022

Meetup: Rust in open-source critical infrastructure

I’ve organized a couple of Rust meetups in The Netherlands this year, and last was not least. On Nov 30 we had four very interesting talks and a cool crowd at the Rust in critical infrastructure meetup in Amsterdam. A round-up.

open-source memory-safety meetup pendulum rust

October 11, 2022

Implementing the Network Time Protocol (NTP) in Rust

For the last couple of months we at Tweede golf have been working on implementing a Network Time Protocol (NTP) client and server in Rust.

The project is a Prossimo initiative and is supported by their sponsors, Cisco and AWS. Our first short-term goal is to deploy our implementation at Let's Encrypt. The long-term goal is to develop an alternative fully-featured NTP implementation that can be widely used.

open-source memory-safety timing pendulum rust

May 24, 2022

Announcing: Statime, a Rust PTP implementation

For the last couple of months, we've been working on a Rust implementation of the Precision Time Protocol called Statime ("statim" is Latin for immediately), and we're proud to announce the completion of the first phase of the project.

open-source statime memory-safety timing pendulum rust