[Troubleshooting] Asus RT-N12 router as an access point

[hydryh]

Hardware: AT&T 2wire modem router combo
Asus RT-N12 3 in one Router.

Pictures: http://imgur.com/a/zdip1

I would say the distance between the routers is about 3-4 car lengths

The At&t Router usually has 5-8 Things connected to it at a time.

Currently trying to get internet out to my desktop.

In the amazing diagram the green diamond represents the at@t modem/router combo which is in the house and the red diamond represents the Asus Router which is in the garage area where I currently am.

I bought the Asus router so I could use it as an access point, and then run a cable from it to my desktop. I can't seem to get it to give me reliable service to my desktop.

At first I thought that maybe it was the desktop but after some testing it seems like it's all devices. Used a laptop to test, which also seems to have the same problems. Laptop works fine when I connect to the WiFi of the At&t router, but when I turn off the WiFi and hardwire into the Asus that's when I start having the problems.

I'm pulling my hair out trying to figure out how to resolve this, another thing to note, when I was in the router settings I was successfully pinging websites. There is an example in the pictures,but after I finish pinging I would try to bring up the website I pinged and would get a no connection problem
.
Was reading that maybe installing custom firmware would help, was reading about tomato?

Maybe this is the wrong way to go about getting internet and there is a better way to go about this?

 

[Darkbreeze]

If the distance is only as much as three or four car lengths, you would be far better served by simply running Cat5 or Cat6 cable to the location unless that is impossible. Your connection speeds would be considerably higher using Ethernet than Wi-Fi and connection issues would be non-existent in regard to signal noise, obstructions and weather interference. It's just a much better option.

If however, that is not possible or is more work than you are capable of dealing with I'd recommend using the ASUS router hardwired to the modem and get an actual access point to use at the remote location. Those modem router combination units are problematic and frankly, suck, when used directly with external hardware through a second or third device.