Okay! So, I have this complex issue with my connection to Xbox Live. My router is a Linksys WTR54GL and my modem is a **** provided by my ISP. Now, I have a perfect connection to the internet and my smartphone, pages load instantly as well as videos. When it comes to Xbox Live however, the lag is terrible and unplayable. I have tried port owarding the correct ports, enabling UPnP, and disabling my firewall. I called my ISP to activate the bridge on the modem but that didn't help much. The weird thing is, is that when I disable my UPnP, even though I have a strict NAT the lag is completely gone. I do know it's not suppose to be like this and I've been having this problem for the past two months. For me the Linksys router I've had for the past 8 years (WRT54GS) has been awesome. But for some reason this happened recently. I think it's something with the modem because it occured when I got my modem replaced by my ISP. My MTU is auto by the way. I tested my ping and the likes on Speedtest and my ping is at an average of 15, and my downloads are near perfect. I have no idea on how to fix this and I've spent countless hours on trying to. Can anyone help me? Oh by the way, I can't play words with friends on my tablet either, so it probably has to do with the router or modem.
Thanks a bunch!