mirror of
https://github.com/shazow/ssh-chat.git
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google-labs-jules[bot]
709ec3818d
This commit introduces mechanism to limit the number of concurrent SSH
handshakes to prevent resource exhaustion (goroutines/memory) during a
SYN flood or connection flood attack.
1. **Global Limit:** A semaphore limits total concurrent handshakes to 20.
This applies backpressure to the `Accept` loop.
2. **Per-IP Limit:** Using `github.com/sethvargo/go-limiter`, we now
limit the rate of connection attempts per IP to 3 per second.
3. **Timeout:** The initial handshake timeout is reduced from 20s to 10s.
The global semaphore is acquired before the handshake and released
immediately after the handshake completes (or fails), ensuring that
long-lived sessions do not consume a handshake slot.
53 lines
4.7 KiB
Plaintext
53 lines
4.7 KiB
Plaintext
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