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OpenNOP
What it is
OpenNOP is a free, open-source Linux network accelerator intended to optimize traffic across point-to-point, partially meshed, and full-meshed IP networks. The project aims to improve performance on lower-speed links such as ISDN, DSL, DS1, frame-relay, and VPN circuits. Its implemented features include LZ compression of TCP segment payloads, and it finds peer accelerators by detecting custom TCP options added to packets. A heartbeat between its user-space daemon and kernel module allows the module to switch to bypass mode. The manual describes inline deployment and an out-of-line setup using policy-based routing. The manual calls a prebuilt appliance image the easiest installation route; a custom Linux host requires libnfnetlink, libnetfilter_queue, and libnl. OpenNOP is self-hosted and licensed under GPLv3. The project is labeled Alpha, with its last update listed as 2015-12-28. Items marked as todo include block-based data reduction, a WCCPv2 client, command-line configuration and statistics, and a web interface. The project lists system administrators as its intended audience and a command-line interface.
For and against
For
- Free and open source under GPLv3.
- Implements TCP payload compression.
- Supports inline and policy-based deployments.
- Includes a bypass mode.
Against
- Project is labeled Alpha.
- Last update listed is 2015-12-28.
- Several features remain marked todo.
- Requires Linux libraries for custom hosts.
The verdict
OpenNOP documents network acceleration and multiple deployment approaches, but its Alpha label and unfinished feature list are important considerations. The project’s listed update is from 2015.
Who it suits
OpenNOP is aimed at system administrators seeking a self-hosted Linux accelerator for network links. It may require comfort with Linux deployment and command-line administration.
Plans and prices
OpenNOP
GPLv3 open-source Linux network accelerator
Read 4 Oct 2026 · sourceforge.net
On the record
- Appliance
- The manual calls the prebuilt appliance image the easiest installation option.opennop.org · read 4 Oct 2026
- Deployment
- The manual describes inline deployment and out-of-line deployment using policy-based routing.opennop.org · read 4 Oct 2026
- Failure handling
- A heartbeat between the user-space daemon and kernel module allows the kernel module to switch to bypass mode.opennop.org · read 4 Oct 2026
- Integration
- The overview describes a WCCPv2 client that informs Cisco routers what traffic to redirect to the accelerator.opennop.org · read 4 Oct 2026
- Intended audience
- SourceForge lists system administrators as the intended audience and command-line as the user interface.sourceforge.net · read 4 Oct 2026
- Intended goal
- The project aims to improve performance over low-speed connections such as ISDN, DSL, DS1, frame-relay, and VPN circuits.opennop.org · read 4 Oct 2026
- License
- The SourceForge project page identifies the license as GNU General Public License version 3.0 (GPLv3).sourceforge.net · read 4 Oct 2026
- Linux requirements
- The manual says any Linux distribution should work and lists libnfnetlink, libnetfilter_queue, and libnl as required software for a custom host.opennop.org · read 4 Oct 2026
- Peer discovery
- OpenNOP discovers other accelerators by detecting custom TCP options they add to IP packets.opennop.org · read 4 Oct 2026
- Project status
- SourceForge labels the project Alpha and lists its last update as 2015-12-28.sourceforge.net · read 4 Oct 2026
- Purpose
- OpenNOP is an open-source Linux network accelerator designed to optimize traffic over point-to-point, partially meshed, and full-meshed IP networks.opennop.org · read 4 Oct 2026
- Support
- The official site links to SourceForge forums and support requests.opennop.org · read 4 Oct 2026
- TCP compression
- The implemented features include LZ compression of TCP segment payloads.opennop.org · read 4 Oct 2026
- Unfinished features
- The Features page lists block-based data reduction, a WCCPv2 client, CLI configuration and statistics, and a web interface as todo items.opennop.org · read 4 Oct 2026
