The following ports (whether inbound or outbound) must be open to allow your DVR to communicate with the TiVo Servers, other TiVo DVRs, and your Macintosh or Windows PC:

• TCP port 37
• TCP port 443
• TCP port 2190
• TCP port 4430
• TCP port 7287
• TCP port 7288
• TCP port 8000
• TCP ports 8080-8089
• TCP port 8101
• TCP port 8102
• TCP port 8200
• UDP port 37
• UDP port 123
• UDP port 2190

In addition, TiVo Desktop for Macintosh computers requires at least one of the following ports to be open for communications: 8101, 8102, or 8200. For more information, see My DVR Cannot Find My Music or Photos Server (Macintosh).

If you have a software-based firewall such as Black Ice, Norton Internet Security, or McAfee Personal Firewall installed on your PC, it may be necessary to adjust your settings to allow the TiVo server to broadcast the TiVo Desktop beacon signal to your TiVo DVR(s). For more information on configuring your firewall, refer to the documentation provided by the firewall manufacturer. If you are using the XP Built-In Firewall, your ports will be configured automatically during the installation of TiVo Desktop.

IMPORTANT: If you configured more than one subnet on your home network, make sure all your TiVo DVRs are on the same subnet. TiVo DVRs cannot communicate through TiVo Desktop and Multi-Room Viewing unless they are on the same network and subnet.

Troubleshooting Port Issues

If your TiVo DVR is having issues connecting to your home network, use one of the following procedures to check if required ports or IP addresses are blocked.

Series2 and Series2 DT DVRs

1. Make sure that ports 80 and 8080 are not being blocked by your router, firewall, or Internet Service Provider (ISP).
2. Verify that the following IP addresses are not being blocked by your router, firewall or Internet Service Provider (ISP):

204.176.49.0 through 204.176.49.127

206.112.115.0 through 206.112.115.255

3. If the ports and IP addresses are configured properly on the router and firewall, but the DVR is unable to communicate with the TiVo service or another TiVo DVR, some ports or addresses may be blocked by your Internet Service Provider. Contact your Internet Service Provider for assistance.

HD TiVo DVRs

Software version 9.4 or later has a port configuration test that checks for blocked ports.

1. Verify that the ports and IP addresses on your network are configured correctly. From TiVo Central select Messages & Settings > Settings > Phone & Network > View network diagnostics > Port configuration test. 
2. If the port configuration test indicates that any ports are blocked, unblock the ports on your router or firewall. 
3. If the ports and IP addresses are configured properly on the router and firewall, but the DVR is unable to communicate with the TiVo service or another TiVo DVR, some ports or addresses may be blocked by your Internet Service Provider. Contact your Internet Service Provider for assistance.

IMPORTANT: Refer to the user manual(s) included with your network equipment or contact the equipment manufacturer for specific help and information on making changes to your home network settings.