Follow this steps :
If you are using Windows 7, do the following:
- Open Control Panel from Start Menu
- Select Windows Firewall
- Select Advanced Settings located on the left of the screen
- Right-click on Inbound Rules, and choose New Rule
- Select Port and Next
- Select UDP
- Select the Specific Local Ports and enter 40000-50000
- Select Allow Connection
- After that, select (V) all options (Domain, Private, Public)
- Give the CSO Name
- Do the same for Outbound Rules
If you are a Windows XP user, do the following
- Click Start and select My Network Places
- Select Network Tasks, and View Network Connection. (or Right-click My Network Places located on the desktop and select properties)
- Right-click on the Internet Connection you are using and select Properties
- In the Advanced Tab, select Settings. (If there is no Setting button, it means all Ports have been opened)
- Click Add to open the new port
- In the Description box, write the name (free).
- In In The Name or IP Address, you can enter your Computer IP or standard 127.0.0.1
- In External Port and Internal Port, enter Port Number 40000.
- Select UDP
- Do the same (Step 1 - 9) to open Port 50000 Open Control Panel from the Start menu.
If the network uses Mikrotik, enter the following command in mikrotik
Update the router's Firmware to the latest version according to the router type.