Error in legacy ssh switches:
Unable to negotiate with 192.168.1.1: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
The OpenSSH website has a page dedicated to legacy issues such as this one. It suggests the following approach, on the client:
ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 126.96.36.199
or more permanently, adding
Host 188.8.131.52 KexAlgorithms +diffie-hellman-group1-sha1
This will enable the old algorithms on the client, allowing it to connect to the server.