Skype and firewalls
1. Launch Zone Alarm firewall (Start > All Programs > Zone Labs > Zone Labs Center).
2. Select “Program Control” from the left hand navigation.
3. Find and highlight Skype in the list of programs.
4. Right click on “Access – Trusted” and select “Allow” from the drop down menu.
5. Do the same for “Access – Internet”, “Server – Trusted” and “Server – Internet”.
Congratulations, you have successfully updated your Zone Alarm firewall.
Restart Skype, it will automatically reconnect (this can take up to two minutes).
If Skype cannot still connect, try restarting your computer or contact your system administrator or ISP for further assistance.