SSH won't open!

Fabio1 · April 17, 2024, 3:34pm

Hello!
I'm new to OpenWRT and want to use the WRT firmware. I'm trying to change the firmware on my Xiaomi AC2100 R2100 router because I don't like the firmware from China! The procedure is very well explained on the OpenWRT website for this router.
The first time, I did everything right and managed to open SSH, but after the last instruction (store the firmware on the router) the power went out! After the debrick I was unable to access the router, but I managed to revert to stock firmware using the official Xiaomi repair tool. I tried again to change the firmware to OpenWRT. I did everything correctly, but when I went to the Prompt (I use Windows 10) to check SSH, this message came up saying it is blocked:

Question: Where am I going wrong and what is the procedure to update the firmware after receiving this message?

greem · April 17, 2024, 3:47pm

Edit the known_hosts file which is detailed in the error message and delete the line beginning "192.168.1.1".

Each time you reset a device to defaults, it generates a new host key and then the client will throw the error you see.

Fabio1 · April 17, 2024, 3:59pm

Thanks for your help! How should I proceed with the instructions on the website?

RadioOperator · April 17, 2024, 4:17pm

get the stok string
copy/paste the stok replace the <stok>
then, copy/paste the 4 web info into an internet browser.
the 1-3 links, return some errers, ignore it, continue...
the last one need mods the old password / new password

finally, after get return = (code0), than you could use SSH to connect your router.

RadioOperator · April 17, 2024, 4:26pm

if you use ubuntu, add the following in ~/.ssh/config file:

 Host 192.168.31.1
    KexAlgorithms +diffie-hellman-group1-sha1

Fabio1 · April 17, 2024, 4:52pm

Steps 1, 2 and 3 => ok

So step 4 would be this? (New Password: XyZ)

http://192.168.31.1/cgi-bin/luci/;stok=/api/misystem/set_config_iotdev?bssid=Xiaomi&user_id=longdike&ssid=-h%3B%20echo%20-e%20'XyZ%5CnXyZ' %20%7C%20XyZ%20XyZ%3B

RadioOperator · April 17, 2024, 5:07pm

I did this before on my xiaomi-R3, likes this:

http://192.168.31.1/cgi-bin/luci/;stok=20a234eb589074330db500790c182822/api/xqsystem/set_name_password?oldPwd=12345678&newPwd=admin

not same as yours.

Fabio1 · April 17, 2024, 11:20pm

Thank you for your help! But I managed it this way:
ssh-keygen -R 192.168.31.1
removing the SSH entry for these IP

I entered SSH and did as indicated on the website. The steps were:

Was the OpenWRT firmware installed correctly?
What is the IP to access OpenWRT? Because 192.168.1.1 and 192.168.31.1 do not work.
NOTE: This Xiaomi AC2100 R2100 router is connected to another main Humax HGB10R-02 (now, I can't access it either!) I'm going to turn off and restart the routers and the computer...

mk24 · April 17, 2024, 11:30pm

Connect one of the LAN ports of the router only to your PC. Don't connect the router to any other network at this time. Also turn off the PC wifi for now. The Ethernet should obtain an IP address in the 192.168.1.X range from the router.

Fabio1 · April 18, 2024, 11:04pm

After doing the entire procedure for installing the OpenWRT firmware in this Xiaomi AC2100 R2100 router, should I leave the router on until the two blue lights lit? Or should I turn off the outlet as soon as the light blinks in orange?
Thanks!

RadioOperator · April 19, 2024, 12:04am

Your router is flashed openwrt correctly.
Do not connect wan cable, you have to wait one blue led lit, then ~2min later, browser should see luci login page, at 192.168.1.1.
Or SSH root@192.168.1.1 should work.