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On the recordRead 9 Oct 202621 facts
Farsight
On the record
- Adaptive scanning
- Its PMap-derived targeting strategy uses accumulated ClickHouse results to guide which ports and IPv4 prefixes to scan.github.com · read 9 Oct 2026
- Adaptive targeting
- Its PMap-derived targeting strategy learns from accumulated ClickHouse results to prioritize ports and IP prefixes.github.com · read 8 Oct 2026
- Configuration
- The scanner is configuration-driven and runs as a long-lived daemon that alternates full sweeps and rescans.github.com · read 8 Oct 2026
- Database requirement
- A reachable self-hosted or managed ClickHouse server is required to store results and seed targeting graphs.github.com · read 8 Oct 2026
- Data storage
- Farsight writes scan results to ClickHouse, which it also uses as the source of historical data for its targeting strategy.github.com · read 9 Oct 2026
- Exclusions
- Operators can exclude CIDR ranges, IP ranges, or individual addresses using exclude.conf.github.com · read 9 Oct 2026
- Extensibility
- Other protocols can be added through parser and payload traits.github.com · read 8 Oct 2026
- Honeypot detection
- It detects hosts returning identical banners repeatedly and abandons the remaining port budget for those hosts.github.com · read 9 Oct 2026
- License
- The repository identifies its license as MIT.github.com · read 9 Oct 2026
- Opt-out
- The maintainer says to request exclusion from mainstream Farsight scanning by emailing [email protected] or submitting a pull request to exclude.conf.github.com · read 8 Oct 2026
- Opt-out contact
- The README says to contact [email protected] or submit a pull request changing exclude.conf to request scanning-range opt-out.github.com · read 9 Oct 2026
- Performance
- The project reports saturating a 1 Gbps link in a test using an Intel I225-V with the igc driver.github.com · read 9 Oct 2026
- Protocol support
- Minecraft Server List Ping is the only implemented application protocol; the README describes traits for adding others.github.com · read 9 Oct 2026
- Purpose
- Farsight is a stateless SYN-based TCP scanner and banner grabber built on Linux AF_XDP.github.com · read 9 Oct 2026
- Rate limiting
- The configurable controller.max_rate sets a global packets-per-second ceiling.github.com · read 9 Oct 2026
- Requirements
- It requires Linux with AF_XDP support, a compatible XDP-capable NIC and driver, Rust nightly, bpf-linker, runtime capabilities, and a reachable ClickHouse server.github.com · read 9 Oct 2026
- Results storage
- Farsight writes scan results to ClickHouse, which also supplies history for its targeting strategy.github.com · read 8 Oct 2026
- Safety controls
- It supports address exclusion lists and a configurable per-address port budget, and its documentation advises honoring opt-outs and keeping scan rates reasonable.github.com · read 8 Oct 2026
