There are not many settings, but nearly every one of them can take your connection down. This list is ordered by what changing it does, not by where it sits on screen - depending on the build these switches are split between the General and Settings pages. See A Tour of the Main Window for the layout.

The toggles

  • System Proxy writes 127.0.0.1:7890 into the Windows proxy settings. A clean shutdown restores them; a force-kill does not, which produces the symptoms in No Internet: A Layer-by-Layer Checklist.
  • TUN Mode captures traffic at the network layer and needs Service Mode installed first - see TUN Mode Explained.
  • Service Mode runs the core as a Windows service. Install once; the dot next to it turns green when it worked.
  • Allow LAN lets other devices on your network use this machine's proxy port. Useful for LAN Sharing, pointless risk otherwise.
  • Start with Windows / Silent Start - launch at boot, and start minimised to the tray.
  • IPv6 is off by default. Read Turning On IPv6 first; if your nodes have no v6, enabling it makes browsing slower.
  • Log Level - info is fine day to day. Switch to debug while investigating something, then switch back; debug output is noisy and costs memory.
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Ports and the external controller

Mixed Port defaults to 7890 and serves HTTP and SOCKS5 on the same number. The external controller defaults to 127.0.0.1:9090 and is the API that web dashboards and scripts talk to; the difference is covered in Ports Explained. There is really only one reason to change a port: something else already holds it - see Port Already in Use.

Set a Secret on the external controller, especially with Allow LAN enabled. Without one, anyone on the same network can switch your nodes and read your connection list through the API.

When a change seems to do nothing

  1. You changed the port but the system proxy still points at the old one - toggle System Proxy off and on so it rewrites the value.
  2. You edited DNS or TUN settings - those need a config reload; switching profiles once is the quickest way.
  3. Service Mode installed but the dot stays grey - usually antivirus blocking the service installer, see Antivirus and Firewall Conflicts.