Strange warning message

Installing and Using OpenWrt
1

Hello I was trying to ssh connect with my router and got this strange error.
I am not expert at all, who is the remote host in this case, the router?
Should I be worried by this?
Any help appreciated

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
2

Change to expected ssl key in dropbear, do you save and restore key.

3

If you have replaced or reset your router to defaults recently (which could include the sys upgrade process), the key that is saved on your computer will not match the one that OpenWrt is presenting. This will trigger a warning, but is easy to fix.

On Linux and Mac, issue the following:

ssh-keygen -R < ip.address.of.router >
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4

Well I've updated to OpenWrt 23.05.5 like 23 days ago so maybe I havent connected via ssh for 23 days? It could be.. I dont remeber. For sure I've connected via luci, but I did a sysupgrade preserving old configuration. Is this happening also in this case?

5

There are several scenarios in which the keys could be out of sync... but in general, it's unlikely that there is actually any real issue. Simply issue the command to remove the old/invalid key.

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6

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