Various problems with legacy SSH systems

Case 1

ssh root@192.168.1.1;

Unable to negotiate with 192.168.1.1 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1

We solved this problem using the following command:

ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 root@192.168.1.1;

Case 2

ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 root@192.168.1.1;

Unable to negotiate with 192.168.1.1 port 22: no matching host key type found. Their offer: ssh-rsa,ssh-dss

We solved this problem using the following command:

ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 -oHostKeyAlgorithms=+ssh-dss root@192.168.1.1;