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PAL (Pcap Analysis Library)

Free plan Linux

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What PAL (Pcap Analysis Library) is

PAL (Pcap Analysis Library) is a free Rust framework and command-line toolkit for analyzing PCAP files on Linux. It reconstructs network data across layers, including captures with fragmentation, missing data, or encapsulation. The project supplies a main analyzer, reusable libraries, a PCAP rewrite utility, and a more verbose test analyzer. Plugins can process packet data at network layers and react when flows are created or destroyed, but they must be embedded in the binary because dynamic libraries are unsupported. Analysis can use worker threads, with packets from one connection sent to the same worker to preserve order; the documented default is one thread. PAL supports pcap and pcapng files and includes protocol dissectors, but not traffic decryption. Experimental live capture requires a build feature, the pcap library, CAP_NET_RAW, and possibly CAP_NET_ADMIN for interface listing. The README describes building with Cargo and running pcap-analyzer. The project is licensed under Apache 2.0 or MIT, and its GitHub releases page lists no releases.

Who it suits

It suits Linux users analyzing packet captures and developers creating embedded plugins for network-data processing. Rust and Cargo experience is relevant to building and using the tools.

What it does well

  • Free Apache 2.0 or MIT licensing
  • Reconstructs fragmented and encapsulated traffic
  • Includes analyzer, libraries, and rewrite tool
  • Supports pcap and pcapng files
  • Worker threads preserve connection order

What to know first

  • Linux only
  • Dynamic plugin libraries are unsupported
  • Live capture is experimental
  • Does not decrypt traffic

Limits

The documented analyzer default is one worker thread, although worker threads can be enabled. Live capture remains experimental and requires specific build features and Linux capabilities.

Getting started

  1. Open the PAL project website
  2. Install Rust and build the tools with Cargo
  3. On Linux, install libpcap-dev when enabling live capture
  4. Run the pcap-analyzer command on a pcap or pcapng file
  5. For live capture, build with the live feature and provide required capabilities

Verdict

PAL offers a focused Rust toolkit for offline PCAP analysis, reconstruction, and extensible packet processing. Its command-line workflow and embedded-plugin model suit developers and analysts comfortable building from source.

Questions

What platforms does PAL support?

PAL is listed for Linux.

Which capture formats can it analyze?

It supports pcap and pcapng files.

Does PAL decrypt network traffic?

No. Traffic decryption is not provided.

How are plugins added?

Plugins are embedded in the program binary; dynamic libraries are not supported.

What does PAL cost?

PAL is free, with a free plan.

Who makes PAL?

The project is associated with rusticata, described as a safe parsers community.

Facts from PAL (Pcap Analysis Library)'s own pages

Build
The README describes building the tools with Cargo in release or debug mode. · github.com, 8 Oct 2026
Build and use
The README describes building with Cargo and running the pcap-analyzer command on PCAP files. · github.com, 7 Oct 2026
Concurrency
Analysis can use worker threads, with packets from a connection dispatched to the same worker to preserve order. · github.com, 8 Oct 2026
Intended users
The project is aimed at users analyzing packet captures and developers building plugins for network data analysis. · github.com, 7 Oct 2026
License
The project is offered under either the Apache License 2.0 or the MIT license. · github.com, 8 Oct 2026
Linux dependency example
The live-capture instructions show installing libpcap-dev with apt-get. · github.com, 8 Oct 2026
Live capture
Experimental live packet capture is available when built with the live feature and the required dependencies. · github.com, 8 Oct 2026
Live capture permissions
Live capture requires CAP_NET_RAW and may require CAP_NET_ADMIN to list interfaces. · github.com, 8 Oct 2026
Maker
The GitHub organization describes rusticata as a safe parsers community. · github.com, 8 Oct 2026
Packet reconstruction
It reconstructs network data across layers and is designed to handle fragmentation, missing data, and encapsulation. · github.com, 8 Oct 2026
Parallelism
The analyzer supports worker threads, while its documented default concurrency is one thread. · github.com, 7 Oct 2026
Plugin limitation
Plugins are embedded in the resulting library, and dynamic libraries are not supported. · github.com, 8 Oct 2026
Plugins
Plugins can process data at network layers and respond to flow creation and destruction events. · github.com, 8 Oct 2026
Purpose
PAL is a Rust framework and toolset for analyzing Pcap files. · github.com, 8 Oct 2026
Release availability
The GitHub Releases page says there are no releases for the repository. · github.com, 8 Oct 2026
Tools
The project includes a main analyzer executable, libraries for analysis and file manipulation, a Pcap rewrite tool, and a debugging analyzer. · github.com, 8 Oct 2026

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