SSH error: Unable to negotate with 192.168.20.1 port 22

I get the following error message when trying to connect to the default gateway via ssh in linux.

Unable to negotiate with 192.168.20.1 port 22 :no matching key exchange method found. Their offer: diffi-hellman-group1-sha1

Is it running SSH?

i believe so, how would i make sure if it is?

Check the web interface and ssh to it. You have tried sshing to it already. It looks like its not running,

Typical SSH error message: ssh 0.200.180.62 Unable to negotiate* with 10.200.180.62 port 22: no matching key 192.168.l.254 exchange method found. This particular error happens while the encrypted channel is being set up. If your system and the remote system don’t share at least one …