Find your symptom, then follow the page it points to.
| Symptom | Go to |
|---|---|
| Callers cannot connect at all | Callers cannot connect |
| A service says “Port in use” or “NOT LISTENING” | Callers cannot connect |
| A caller is refused or banned | Callers cannot connect |
| FTP connects but cannot list or download | Callers cannot connect |
| A door or plug-in does not start | Doors and plug-ins |
| Mail does not arrive or leave | Mail and networks |
| A program will not start, or an install or update stopped | Programs, installs and updates |
LOGS. Most problems say what is wrong.