Automatic port opening

When you need this: Check my network reports that the router refused to open a port, or that no router answered.

Opening a port makes you reachable over IPv4, also for friends without IPv6. Many calls work without it (see How calls connect), but it's the most effective single setting.

#Steps

1. In Tact-VC, turn on Settings → Network → Open port on my router (UPnP / NAT-PMP). It's off by default.
2. Open your router's web interface. Its address is printed on the router or in its manual, often 192.168.0.1, 192.168.1.1, fritz.box or router.home.
3. Find the setting for automatic port opening. Routers name it differently, for example UPnP, NAT-PMP, PCP, allow independent port sharing for this device or allow devices to open ports automatically. It's usually under Internet, NAT, Port forwarding / Port sharing, Network or Advanced.
4. Turn it on. Some routers need this per device: select your computer, not only the general switch.
5. Restart Tact-VC.

#Check it worked

Run Check my network again. Port opened passes and shows your public address.

#Still not working

• Your router has no such setting, or you'd rather not use it: forward the port by hand, see Port forwarding.
• Public IPv4 warns about CGNAT: opening ports can't help, see Shared internet address.