Posted September 3, 2019 I am setting up a server to run in my garage, but whenever I plug it into the modem there, I can't get online. The server is running windows server 2012 r2, and it seems to think that the Ethernet "doesn't have a valid IP Configuration." However, I have run through all the troubleshooting steps for that error and it doesn't seem to be the issue. Most of the devices in my home are connected to a wireless router in another part of the house that is connected to that same modem. When I connected the server to that router, it was able to get online just fine. I went back to the garage and tried to connect a laptop, but that didn't work either. Next, I tried plugging in a spare router into the modem, then plugging that into the server, and that didn't seem to work either. I also tried connecting it to the modem via a network switch, and then both the router and the network switch, but neither of those worked. To make sure I wasn't going crazy, I reinstalled windows and tried all the same things with the laptop but that didn't work either. I think it may have something to do with my modem and possibly the ISP, but they have really crappy customer service so I would like to avoid getting involved with them as long as possible because it won't go anywhere. Link to comment https://linustechtips.com/topic/1100749-computer-cant-connect-through-modem/ Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted September 3, 2019 22 minutes ago, IsaacG said: I am setting up a server to run in my garage, but whenever I plug it into the modem there, I can't get online. The server is running windows server 2012 r2, and it seems to think that the Ethernet "doesn't have a valid IP Configuration." However, I have run through all the troubleshooting steps for that error and it doesn't seem to be the issue. Most of the devices in my home are connected to a wireless router in another part of the house that is connected to that same modem. When I connected the server to that router, it was able to get online just fine. I went back to the garage and tried to connect a laptop, but that didn't work either. Next, I tried plugging in a spare router into the modem, then plugging that into the server, and that didn't seem to work either. I also tried connecting it to the modem via a network switch, and then both the router and the network switch, but neither of those worked. To make sure I wasn't going crazy, I reinstalled windows and tried all the same things with the laptop but that didn't work either. I think it may have something to do with my modem and possibly the ISP, but they have really crappy customer service so I would like to avoid getting involved with them as long as possible because it won't go anywhere. Sounds like you have a Gateway(Modem/Router) from your ISP. Do you know if its in bridged mode? If so, then its acting like a Modem, meaning only one Ethernet port will be active. This is because standard modems dont do NAT. Meaning they one share the 1 IP address the ISP gives you with multiple machines. If you gateway is in bridge mode OR if you have one of those Docsis 3.1 modems that have multiple Ethernet ports for LAG, then you will have to connect all your devices to your router. The reason for bridged mode is so you dont have double NAT, which can cause havoc in some cases. I just want to sit back and watch the world burn. Link to comment https://linustechtips.com/topic/1100749-computer-cant-connect-through-modem/#findComment-12861842 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted September 3, 2019 Author I probably should have said earlier that the modem is from my isp, what can I do to get it working with the server? Link to comment https://linustechtips.com/topic/1100749-computer-cant-connect-through-modem/#findComment-12862155 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted September 3, 2019 7 hours ago, IsaacG said: I probably should have said earlier that the modem is from my isp, what can I do to get it working with the server? What model is it? Because Modems dont do routing and things, a standard modem generally just gets ONE device online. Which is the need for a router. So we have to determine if its a gateway or not. If its in fact a gateway, then we have to see if its in bridged mode. If so, well then you have a choice to make. Take it out of bridge mode and suffer double NAT on your other router, or keep it in bridge mode and run a cable from your other router. I just want to sit back and watch the world burn. Link to comment https://linustechtips.com/topic/1100749-computer-cant-connect-through-modem/#findComment-12862730 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted September 7, 2019 Author With some effort I was able to route an ethernet cable, and it is working fine now Link to comment https://linustechtips.com/topic/1100749-computer-cant-connect-through-modem/#findComment-12874631 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
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