HR21-700 DVR internet connection is hit and miss. Does anybody have a suggestion? What am I missing, or is something wrong with my DVR? My network: Cable internet from Cox, 10Mbps download speed. --> Modem; Scientific-Atlanta Webstar DPC2100 --> Router; Belkin Wireless G F5D7230tt4 (DHCP ON) 100Mbps 802.11g --> Adapter Slinglink Turbo 1-port (wired) --> Adapter Slinglink Turbo 4-port (wired) --> Game console Playstation3 (wired) --> TV Streaming Slingbox Solo (wired) --> DVR Directv HR21-700 (wired) DHCP on the router is enabled. My IP address pool is 192.168.2.2~100. Lease time is forever. MAC address filtering is ON, and naturally I've checked, all clients on my network are listed in the router configuration by MAC address and nothing is blocked. No clients are in the "DMZ" meaning nothing is outside the router firewall. When I leave my DVR disconnected from the network, EVERYTHING WORKS FLAWLESSLY, I repeat FLAWLESSLY, using the universally understood protocols of TCP/IP etc. Let there be no doubt, there is nothing wrong with my network, except maybe some setting that ONLY the DVR needs. I have tried practically everything I have read here on this forum, and others, to get a reliable internet connection. Sometimes it works, sometimes it doesn't. Resetting everything to DEFAULT is not the silver bullet some people are saying. If you got your Directv DVR connected to the internet, congratulations, but you were lucky because the whole process is a lottery. Even when I have gotten it working, it doesn't last. Case in point, the DVR manual says use the top ethernet port, if you have more than one. In the DVR/System/Network/Advanced Setup I configured manual settings, and assigned the IP address given by DCHP from my router (192.168.2.5). DVR Network Services were on Automatic. After clicking "Connect Now" I got error 22. Ran the DVR system test, DVR said all my settings (IP address, subnet mask, DNS, gateway etc. all OK, Network OK, Internet not connected). Now the inexplicable part; I moved the ethernet cable on the DVR from the top to the bottom port, tried connect again and bingo, Internet got connected. That was Feb 28 2010. Today, March 7th, the ethernet cable is still in the top port, and without making any changes to my network settings the system test says "internet not connected". Even weirder, the Playstation can't get a connection to my network unless I disconnect the DVR ethernet cable. Again, I'm using DHCP but all the clients get the same IP they got the first time they were ever connected, so practically, IP addresses are "fixed". Moving the ethernet cable from the top to the bottom port on the DVR has also worked in the past on the advice from Directv phone support. I bet it would work right now, but why does the DVR not maintain it's connection, and why is it blocking the PS3? Anyway, I'm tired of messing with this. All my computers, the slingbox and the PS3 were set-up one time and have worked perfectly since then. I'm not a novice when it comes to home networking. Put the DVR on the network and it's a royal pain. If you want to stream music and video, try the PS3, it has NEVER had a problem, and the GUI is better than DTV anyway. If you want on demand programming, get Netflix and use their Instant Queue. Cheers.