Installing OpenWRT on a RT-AC51U to make it a bridge [Newbie]

Installing and Using OpenWrt
1

Hello everyone, this is my first time trying to use OpenWRT and I'm struggling a bit. I'm using Windows 7. I've followed the installation instructions I'm pretty sure, but when I got to "ssh root@192.168.1.1" using Cmder it timed out.

What I did(in short):
Downloaded the openwrt-18.06.4-....-sysupgrade.bin file from the RT-AC51U information site.
Installed and hosted a TFTP server.
Activated TFTP on Windows.
Went through the TFTP method("TFTP -i 192.168.1.75 put open...sysupgrade.bin 192.168.1.1").
It said it transfered, but then I couldn't access it with SSH.

I might be doing something completely wrong or missing a step or two.

The end goal is to create a bridge from another router to mine, is that even possible/which method is the best?

Goal:
WAN -> RT-N65U(Asus firmware, not mine but I've access) -> wireless -> RT-AC51U(OpenWRT) -> Ethernet cable -> my PC

2

Are you connected on a LAN port?
Does your computer get IP 192.168.1.100 from the DHCP server of OpenWrt?
Does pinging 192.168.1.1 respond?

3

Yes, the first one.

Had a static IP of 192.168.1.75, but nothing changed when I set it to 192.168.1.100. When I set it to automatic I got 169.254.104.185 instead.

No, I get request timed out if my IP is static at 192.168.1.100. (Accidentally pinged from 169.254.104.185 first.)

4

It means that OpenWrt is not running correctly. It it was you'd get 192.168.1.100 from DHCP server.
I suggest you try to restore the factory firmware and try again.

5

Ah okay that worked! I understood it as the firmware restoration reset it to Asus firmware, so used the TFTP method instead.

Which bridge option would you recommend? Or is it even possible?

6

Does the main router connected with WAN need to be a AP? Because it's currently in "Wireless Router Mode".

7

Not all chips are capable of bridging client (or station) mode with the LAN. Therefore you need to try the various options and see which works best.

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