# Setting up a port forward through Time Machine

**URL:** https://forum.syncthing.net/t/setting-up-a-port-forward-through-time-machine/1471
**Category:** Howto
**Created:** [November 29, 2014, 7:40pm UTC](https://forum.syncthing.net/t/setting-up-a-port-forward-through-time-machine/1471 "2014-11-29T19:40:46Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![blezek](https://forum.syncthing.net/user_avatar/forum.syncthing.net/blezek/32/676_2.png) [@blezek](https://forum.syncthing.net/u/blezek)
#### Post date: [November 29, 2014, 7:40pm UTC](https://forum.syncthing.net/t/setting-up-a-port-forward-through-time-machine/1471/1 "2014-11-29T19:40:46Z")

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Time Machine is not (yet?) supported by Syncthing because it does not use UPnP. Thought I would document how I set it up on our home network. Much help from [How to Configure Port Forwarding on a Time Capsule](http://must-know-mac.blogspot.com/2008/07/how-to-port-forward-time-capsule.html)

## Give one machine a fixed internal IP

I set my primary machine receive the same internal IP address. On the Time Capsule, assign a DHCP ID to an IP. In my case `revelation` will always be `10.0.0.36`.

![](https://forum.syncthing.net/uploads/default/699/cdc46a2828890e91.png)

Click the `+` button to add a DHCP Reservation:

![](https://forum.syncthing.net/uploads/default/700/8ca12087aa211b5e.png)

Make sure your Mac is configured to ask for the correct `Client ID`, `revelation` in my case. Look under the `Advanced` button on the `Network` preferences.

![](https://forum.syncthing.net/uploads/default/701/13615ce1e41235ca.png)

## Forward an external port to an internal machine

Back to Time Capsule. Now add a `Port Settings` entry mapping the Syncthing port (`22000` by default) to an internal IP:Port combination. Click the `+` under `Port Settings`.

![](https://forum.syncthing.net/uploads/default/702/6653820e92ae4476.png)

In my case, I want TCP and UDP from the Internet coming to port `22000` to be routed to `10.0.0.36:22000`. Note: `10.0.0.36` is the IP assigned in the previous step.

![](https://forum.syncthing.net/uploads/default/703/0ccf97bb5303cd20.png)

Now Syncthings running on other machines will connect to the Time Capsule’s Internet-facing IP address (assigned from an ISP) to port `22000` and the Time Capsule will forward to an internal IP on port 22000.