How Does LogMeIn Get Through the Firewall?


LogMeIn is actually more than one product, offering several levels of computer-to-computer communication, and the software has even been included in some automobiles. When you use LogMeIn to contact a computer behind a firewall, you need to configure the firewall software before LogMeIn can connect.

LogMeIn Software

  • LogMeIn products that enable varying types of remote access between computers include LogMeIn Free with basic remote-access features, LogMeIn Pro with file transfer and video streaming, and business products enabling IT staff to remotely administer corporate PCs. Other products enable users to control their computers using a smartphone. Connections use 256-bit SSL encryption for security.


  • By definition, firewalls are designed to prevent unwanted software connections to protected computers. This means that if a firewall is specifically configured to block LogMeIn or a similar application, the software won't get in. However, if the firewall is improperly configured or deactivated, it may allow unintended connections. While LogMeIn uses a direct connection to communicate between computers, the connection process uses the LogMeIn servers and a fixed port.

Personal Use

  • According to LogMeIn Inc., the LogMeIn software is compatible with most personal firewall software and broadband routers. When you install the software, your personal firewall will normally ask if you want to allow LogMeIn permission to connect. To manually configure your personal firewall to allow LogMeIn to connect, add the following lines to your firewall software's allowed connections list:


    If you're using a broadband router or other hardware with an integrated firewall, you must allow traffic on TCP port 443 for most products and port 2000 for LogMeIn RemotelyAnywhere.

Business Use

  • If you want to connect using LogMeIn from work or school, you must contact your IT administrator to ask that they enable the connection. To prevent breaches of security or access to material not normally permitted, some workplaces or schools may specifically block LogMeIn from connecting through their networks. If you must connect to your home computer from a location where such a connection isn't permitted on the local area network, consider using a laptop with a mobile wireless card or a LogMeIn product that enables connections from your personal smartphone.

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