I am using 19.07:
[Powered by LuCI openwrt-19.07 branch (git-21.189.23240-7b931da)](https://github.com/openwrt/luci) / OpenWrt 19.07.8 r11364-ef56c85848
Unable to negotiate with 192.168.1.1 port 22: no matching host key type found. Their offer: ssh-rsa
OpenSSH_8.9p1 Debian-3, OpenSSL 1.1.1n 15 Mar 2022
Is my router be hacked? or something wrong?
and how to logon and reconfigure dropbear?
ssh -oHostKeyAlgorithms=+ssh-rsa firstname.lastname@example.org
does it only once or each time I ssh my router?
is there some settings?
HostKeyAlgorithms refers to openwrt or my pc?
Dropbear on OpenWrt offers an ssh-rsa key, which is rejected by openssh because it is not in it's list of accepted keys (implicit or in ssh_config). Using this commandline option the config is overruled in you local ssh client.
Don't know if you have to specify it each time, maybe it is stored in known_hosts.
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