I installed openssh-server in Ubuntu server 16.04 and in /etc/ssh/ssh_config I added:

MaxAuthTries 3

PasswordAuthentication YES

and then restarted the ssh server. When I try to connect from a a different pc with ssh I get a message
Algorithm Negotiation failed

back in server, when I run systemctl status ssh I get this error

Unable to negotiate with 192.168.0.132 port 63428: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1

I edit the /etc/ssh/sshd_config add I add the line

KexAlgorithms=+diffie-hellman-group1-sha1

and now I get a different error, when I run the systemctl status ssh

Unable to negotiate with 192.168.0.132 port 63428: no matching key exchange method found. Their offer: aes128-cbc,3des-cbc, blowfish-cbc,cast128-cbc,twofish-cbc,arcfour [preauth]