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Calls: Add note about alternate TURN ports #17862

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Oct 29, 2024
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Calls: Add note about alternate TURN ports #17862

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4 changes: 4 additions & 0 deletions src/content/docs/calls/turn/index.mdx
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Expand Up @@ -18,6 +18,10 @@ Using Cloudflare Calls TURN service is available free of charge when used togeth
| TURN over TCP | turn.cloudflare.com | 3478/tcp | 80/tcp |
| TURN over TLS | turn.cloudflare.com | 5349/tcp | 443/tcp |

:::note[Note]
Use of alternate port 53 only by itself is not reccomended. Port 53 is blocked by many ISPs, and by popular browsers such as [Chrome](https://chromium.googlesource.com/chromium/src.git/+/refs/heads/master/net/base/port_util.cc#44) and [Firefox](https://github.com/mozilla/gecko-dev/blob/master/netwerk/base/nsIOService.cpp#L132). It is useful only in certain specific scenerios.
:::

## Regions

Calls TURN service is available in every Cloudflare data center.
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