InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now. Learn more →
Top 7 C Firewall Projects
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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Project mention: gsocket alternatives - autopunch, hyperswarm, and hyperssh | libhunt.com/r/gsocket | 2025-06-05
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zfw
An EBPF based IPv4/IPv6 firewall with integrations for OpenZiti Zero-Trust Framework edge-routers and tunnellers
- know how to negotiate the end to end encrypted tunnel to the 'far' identity
So yes, if they can do all that, then they'd definitely be able to attack that remote service. But I said "remote service", not "remote services". All that work and compromises and they only have access to 1 single service among hundreds, thousands, or potentially millions of services. Lateral movement is almost impossible. So the attacker would have to repeat each of the 5 steps for every service possible. Also, they don't know which company sits behind which OpenZiti fabric, so its pot luck if its even against the target they want to try and exploit.
Finally, we have developed a stateful firewall called 'ZitiFW' - https://github.com/netfoundry/zfw - which uses eBPF to look at the IP information of any incoming connections/packets to an Edge Router (Ziti's Policy Enforcement Point), if a connection/packet is received from an IP address which is not correlated to a known, bootstrapped endpoint to the overlay, the packet can be blackholed.
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firewall
:rainbow: eBPF-based programmable firewall, intended for use in Go backends (by tholian-network)
Project mention: Pegasus to Predator – The evolution of Commercial Spyware on iOS [video] | news.ycombinator.com | 2024-12-30> Have you written any eBPF code?
Yes. [1]
[1] https://github.com/tholian-network/firewall/blob/master/ebpf...
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
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A note from our sponsor - InfluxDB
www.influxdata.com | 10 Jul 2025
Index
What are some of the best open-source Firewall projects in C? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | esp_wifi_repeater | 4,990 |
| 2 | WinDivert | 2,797 |
| 3 | gsocket | 1,706 |
| 4 | npf | 254 |
| 5 | bouheki | 89 |
| 6 | zfw | 60 |
| 7 | firewall | 25 |
Sponsored
InfluxDB – Built for High-Performance Time Series Workloads
InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
www.influxdata.com