CentOS7
To get SSH going I had to set SELinux to permissive
check status: getenforce
https://www.rootusers.com/how-to-enable-or-disable-selinux-in-centos-rhel-7/
https://dev.to/zduey/how-to-set-up-an-ssh-server-on-a-home-computer
OpenDNS
https://support.opendns.com/hc/en-us/articles/228007347-Linksys-Router-Configuration-General