Coordinated Deployment and Reachability Asymmetry of Chinese I2P Routers

Fri, 03 Jul 2026 00:00:00 +0000

We are releasing a preprint that characterizes a cluster of Chinese I2P routers discovered via passive DHT scanning.

Key Findings

Across five i2pd 2.60.0 floodfill instances, we scanned the I2P network over multiple collection rounds (June 29 – July 1, 2026) and discovered 20,701 unique routers.

The matched CN cluster (58 routers) exhibits:

2–3× elevated floodfill declaration rate (27–36% vs. 14–20% global baseline) in their RouterCaps — yet zero were observed participating as active floodfills.
Version lock on 0.9.66 (79.3% of CN routers vs. 1.8% globally) — a 43× enrichment.
82.8% share a high-bandwidth XfR/XRG RouterCaps template; 32.8% explicitly carry the floodfill flag (f) via XfR.
Concentrated on Alibaba Cloud (AS37963, 46.2%), with no knownRouters or family declarations, and ongoing IP rotation.
Four China-vantage-only routers — observed only from inside China’s GFW, unreachable from Singapore and Tor exit paths — with TCP RST/timeout behavior consistent with selective reachability filtering along the path.

Our Approach

We distinguish three separate concepts throughout the paper:

I2pd netvm based on debian guide

Wed, 15 Jan 2025 00:00:00 +0000

This guide demonstrates how to set up i2pd as a netvm, allowing you to easily proxy traffic through the i2p network to access the clearnet or i2p services. This significantly enhances security and privacy.

This method is an improved implementation compared to the I2pd netvm guide, utilizing debian-12 and avoiding the outdated i2pd-qt and archlinux community template.

Installation

First, you need a debian-12-xfce template VM.
Clone this template and name it debian-12-xfce-i2pd.

I2P Research on iasds

Coordinated Deployment and Reachability Asymmetry of Chinese I2P Routers

Key Findings

Our Approach

I2pd netvm based on debian guide

Installation