You will need to port forward if you want to access it outside of your local network. I recommend watching a video or two on port forwarding. If you are on Windows, open command prompt and type "ipconfig" it will show you the default gateway. Type that address into your browser and login to your router. Look for an option called port forwarding or port mapping. My router calls it port mapping.
Here's an example.
Your router's public IP is: 188.8.131.52
Your computer's private IP is: 192.168.2.2
Your router's private/LAN IP is: 192.168.2.1
When port forwarding, you will need to tell your router the private/LAN IP and the LAN port number. Tixati uses 8080 by default. You will also need to pick a public port number. You can pick the same port(8080) for the public port. If your router asks you for a protocol, select TCP because that's what HTTPS/HTTP uses.
This is the information my router asks for on the port forwarding page.
LAN IP Address Protocol Type Public Port LAN Port
192.168.2.2 TCP 8080 8080
After port forwarding, your URL to remotely access the webUI would look something like this:
If your IP is dynamic(most likely), you should get a dynamic DNS service. I won't mention any specific ones but there's at least one free one you can use.
If you want to access the webUI locally use the private/LAN IP instead of the public one(even if you do setup port forwarding). Example:
Consider enabling HTTPS in Tixati webUI settings even if you aren't accessing it remotely over the internet.
If you have any questions, let me know and I can explain it in more detail.