Overview for Configuring a Firewall or Router to Allow Laplink Connections

Document relates to: PCsync (5.x and newer), FileMover, Laplink Gold (All Versions)


I cannot connect with Laplink Gold, PCsync or FileMover, and I suspect my firewall or router is the problem, how do I fix this?


A firewall or router must be configured properly to allow Laplink to connect over the necessary ports. Laplink utilizes TCP ports for: 

New! Laplink Gold 12 is capable of connecting over the Internet without the need to configure most routers or firewalls! Please see Frequently Asked Question 215.


Personal Firewall Software
Alternatives to Port Forwarding
Ports Used

NOTE: If you do not find specific instructions for your firewall or router, please contact the manufacturer for assistance in configuring it. For a list of ports used by Laplink, see Ports Used below.


NOTE: The firewall / router on the host end must always be configured. A Firewall / router protecting the guest computer may not require configuration.

Please see your specific router's documentation or manufacturer support website for specific information on how to set up port forwarding. For the list of ports used, see below.

Personal Firewall Software:

The easiest solution is to temporarily disable the firewall software for Laplink purposes. If you aren't sure how to disable the firewall software, Technical Document 252: How to Prevent Background Programs from Starting when Booting Your Computer may allow you to keep the software from loading, but will not work with all firewall software. If disabling the firewall software is not desirable or practical, click the name of the firewall for more information on configuring it to allow Laplink Connections.

These executables send data through the firewall:
LAPLINK.EXE - Laplink application
LLSERVERMAIN.EXE - Laplink web server
SERVERPROXY.EXE - Laplink Everywhere (Gold 11.5 and higher only)

NOTE 1: Both Internet and LAN connections will require disabling or configuring software firewall.

NOTE 2: In cases where your computer is protected by a hardware firewall/router appliance as well as software, consider completely uninstalling the firewall software. In most cases, the hardware firewall will provide all the protection you need.

Windows XP Firewall (SP2)

For other personal firewall software, please see your specific firewall's documentation or manufacturer support website for specific information on how to set up port forwarding. For the list of ports used, see below.

Alternatives to Port Forwarding:

NOTE: Both of these services will allow for connections to multiple Laplink host computers behind a firewall or NAT router on the host.

Ports used:

The following TCP ports are used for inbound and outbound connections:

This Article can be found by searching for:

Keywords: Security: Firewall, Security: Internet, Connections: Internet, Network: Router, Internet: Firewalls, Internet: Router, Internet: ILS, Internet: NAT

Platforms: Win95, Win98/SE, WinNT, WinMe, Win2K, WinXP, WinVista, Win7

Article#: 633

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