I try to do a scp on my centos (without having ever configured anything on the ssh_config) receiving:
Bad configuration option: CheckIP
Where in ssh_config CheckIP no is configured.
Didn't find anything with google, whats up with that error?
It seems you using wrong directive, try CheckHostIP instead of CheckIP
There is no CheckIP directive. There is a
CheckHostIP If this flag is set to “yes”, ssh(1) will additionally check the host IP address in the known_hosts file. This allows ssh to detect if a host key changed due to DNS spoofing. If the option is set to “no”, the check will not be executed. The default is “yes”.
If you're not specifying this on the command line
scp -o checkhostip=no ...
then you should look in /etc/ssh/ssh_config for a sitewide default or ~/.ssh/config for your local defaults.