FAQ: How do I configure my network settings to connect to the EyeLink Host PC?
The Stimulus Display PC's IP address and subnet must be in the same range as the Host PC for the two computers to properly communicate.

The default IP address of the EyeLink Host PC is and as such the typical IP address of the stimulus Display PC should be and the subnet mask should be 

  • If the Display PC is a Windows PC:

    Connect the Host PC to the Display PC via an ethernet cable. Go to the Control Panel -> Network and Internet -> Network and Sharing Center -> Ethernet (1). Click the Properties button to open the Ethernet Properties (2). Select the Internet Protocol Version 4 (TCP / IPv4) item (3). Click the Properties button to open the TCP / IPv4 Properties (4). Select the "Use the following IP address:" and enter for IP address and for subnet mask (leave the Default gateway blank).


  • If the Display PC is a Mac:

    You can make these changes by going to the System Preferences -> Network control panel. From here change the Network priority to make sure our dedicated ethernet connection is the top priority. To do this first select the Action button in the bottom left hand corner and choose Set Service Order. In the resulting window, drag the dedicated Ethernet link to the top of the list. Then click OK to accept the new settings.


    Next, configure the IP address. Select your dedicated Ethernet adapter and then change the configure IPv4 to "Manually" and set the IP address to and the subnet mask to (you can leave the router and DNS fields blank).


    Finally, click the Advanced tab at the bottom of the page pictured above and go to the Hardware tab. Make sure the Duplex setting is set to "full-duplex" (note that it should not be 'full-duplex with flow control').

    If after following these instructions there are still connectivity issues between the Mac Display PC and an EyeLink 1000 or EyeLink II system, then it is also suggested that you configure the "Speed" setting to 100baseTX in the Hardware tab. While the modern hardware of our EyeLink 1000 Plus and Portable Duo systems will support 1000 Mbps connection speeds, the EyeLink 1000 and EyeLink II systems may not provide this compatibility. We've most frequently seen that Mac OS computers will by-default expect to make a connection at the maximum supported 1000 Mbps speed unless it is specifically configured for 100 Mbps.

  • If the Display PC is running Linux: