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Chisel: A fast TCP/UDP tunnel over HTTP

github.com Software & code Software projects Web & internet Candidate
Screenshot of github.com captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 5 calendar years, with breakout response in 2 of them.

submissions
5
submitters
5
observed span
2015–2024
peak thread · 59 comments
289 pts
latest 20+ return · 2024-04-04
289 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

I've used this before and it's great as a "reverse tunnel" when you have a VM in the cloud that does allow configurable port forwarding/firewall rules but need to connect "peer to peer" to a customer in a workshop who has the typical "my router blocks everything and we aren't going to spend the time supporting every workshop's possible inbound network connection setup". It helps for "flipping" the "server connects to client". But... it gets detected as malware really easily…

Why TCP over websockets? You can just use the HTTP bodies as a stream in both direction. Which means the proxy just has to strip or add HTTP headers before forwarding. The overhead afterwards is 0 -> you just write to the socket.

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
400

reference only — not used in Hall rules or ranking

Total comments
97

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2015-03-17Chisel – A fast TCP tunnel over HTTPjpillora40
2017-01-09Chisel – A fast TCP tunnel over HTTPFirst breakoutaus_10138
2020-01-11Chisel: A Fast TCP Tunnel over HTTPsdan30
2021-01-04Chisel – Fast TCP/UDP Tunnel, Transported over HTTP, Secured via SSHsrueg30
2024-04-04Chisel: A fast TCP/UDP tunnel over HTTPBest thread · Latest 20+ point returnlyu0728228959