The firewall of McAfee antivirus is the main thing that controls the activities of your system. In the antivirus securities, McAfee is the famous one utilized over the globe. However, it creates problems for users such as blocks other programs or safe sites too. This issue occurs when the setting is not appropriate for the program or site you are using. So, you have to change that by going to the setting of antivirus, then select firewall settings. If you are newbie and do not about firewall settings, then you should talk to the technicians and take the help from them. They will make you understand how to make changes and what changes you need to make To know more about them, you must visit the link http://www.geekwebservices.co.uk/anti-virus-support/support-for-mcafee/