macos - After update Mac OS Sierra, Can not use ssh login remote system,how can I fix this?

Question

when I use user@ip to login remote system, it report like this:

debug1: /etc/ssh/ssh_config line 17: Applying options for *
/etc/ssh/ssh_config: line 20: Bad configuration option: gssapikeyexchange
/etc/ssh/ssh_config: line 21: Bad configuration option: gssapitrustdns
/etc/ssh/ssh_config: terminating, 2 bad configuration options

Answer 1

Comment the following lines in /etc/ssh/ssh_config from

# System-wide defaults set by MIT Kerberos Extras
Host *
  GSSAPIAuthentication yes
  GSSAPIDelegateCredentials yes
  GSSAPIKeyExchange yes

to

# System-wide defaults set by MIT Kerberos Extras
#Host *
#  GSSAPIAuthentication yes
#  GSSAPIDelegateCredentials yes
#  GSSAPIKeyExchange yes