Edited Troubleshooting.md #214

TROUBLESHOOTING.md

@@ -3,3 +3,39 @@ Troubleshooting
 The installation and setup of Shairport Sync is straightforward on recent Linux distributions. Issues can occasionally arise caused by problems elsewhere in the system, typically WiFi reception and/or the WiFi adapter settings, the network, the router, firewall settings.
 
 In this brief document will be listed some problems and some solutions.
+
+### UFW firewall blocking connections on Raspbian (Raspberry Pi)
+
+**Problem**
+
+You have installed Shairport-sync successfully, the deamon is running, you can see it from your remote terminal but you are unable to play a song.
+
+**Before you change anything to your configuration**
+
+- Type the following command:
+
+ `sudo ufw disable`
+
+- Try to launch a song from your remote device on the Shairport-sync one, if this works, proceed to the next step and follow the ones described below, in the solution section.
+
+- Enable UFW through the following command:
+
+ `sudo ufw enable`
+
+**Solution**
+
+You have to allow connections to your Pi from remote devices. To do so, after re-enabling UFW (see last stp of the previous section), enter the following commands in shell:
+
+```
+sudo ufw allow from 192.168.1.1/16 to any port 3689 proto tcp
+sudo ufw allow from 192.168.1.1/16 to any port 5353
+sudo ufw allow from 192.168.1.1/16 to any port 5000:5005 proto tcp
+sudo ufw allow from 192.168.1.1/16 to any port 6000:6005 proto udp
+sudo ufw allow from 192.168.1.1/16 to any port 35000:65535 proto udp
+```
+
+You may have to change the IP adresses range depending on your own local network settings.
+
+You can check UFW config by typing `sudo ufw status` in shell. Please make sure that UFW is active, especially if you have deactivated it previously for testing purpose.
+
+Run your song from your remote device. Enjoy !