You should not, however, solely rely on firewalls as your single means of defense. There are additional factors to consider for protecting your network. Do you provide secure remote access with strong authentication techniques? Similarly, you should know whether your system uses the latest quarantine technologies that help to automatically identify remote laptops or desktops with inefficient virus patches or security. Another avenue to consider is the use of technologies such as Microsoft Outlook Web Access or Outlook access that uses RPC over HTTPS to reduce the need for remote connections to the network.