---
title: "Tailcat"
description: "1 posts about Tailcat, summarised, each linking to the original."
---

# Tailcat
> 1 posts about Tailcat, summarised, each linking to the original.

## Articles

### [Your sandbox can now serve requests](https://yomu.fyi/post/your-sandbox-can-now-serve-requests.md)
- Company: [Boxcompute](https://yomu.fyi/company/boxcompute.md)
- Author: boxy
- Published: Sep 19, 2026
- Type: Announcement

Sandboxes have traditionally been outbound-only machines, unable to receive inbound connections because they sit behind NAT with no public IP or open ports. BoxCompute now enables sandboxes to serve requests by using Tailcat, an open-source library from Tailscale that performs NAT traversal. Tailcat establishes a direct peer-to-peer WireGuard-encrypted path between the client and sandbox, using a DERP relay only for the initial handshake. This approach avoids the latency and bandwidth bottlenecks of relay-based tools like ngrok or Cloudflare Tunnel, and keeps the relay out of the data path. The feature is rolling out as an early preview with scoped, short-lived grants for selected TCP ports.