Updated Known issues and solutions (markdown)

Known-issues-and-solutions.md

@@ -32,3 +32,10 @@ Usually you can avoid traffic loop by adding a route exception, for example on l
 ```
 ip route add ${udp2raw_server_ip} via ${default_network_gateway}
 ```
+
+### Run inside virtual machine
+make sure your virtual machine's virtual network adapter is running as bridged mode, other mdoes are not guaranteed to work.
+
+### Run inside docker
+only works on linux and `--network=host` is used.
+It doesn't work on other OS, since other OS's docker doesnt support raw socket.