Hardware

SSH Access

Copy SSH Key to Host

From the local host, copy your public ssh key to the nodes:

ssh-copy-id -i <PATH_TO_SSH_KEY> ubuntu@<HOST_IP>

Disable SSH Password Login

Edit the following options in the sshd config:

...
PermitRootLogin no
PasswordAuthentication no
ChallengeResponseAuthentication no
UsePAM no

service ssh restart

Enable SUDO without password

Edit the following line in the sudoers file:

...
%sudo    ALL=(ALL) NOPASSWD:ALL
...

Scramble User Password

The user password is no longer needen.

head -c 500 /dev/urandom | tr -dc 'a-zA-Z0-9~!@#$%^&*_-' | fold -w 24 | head -n 1 | passwd ubuntu --stdin

Keepalived

vrrp_instance VI_API {
        state MASTER
        interface eth0
        virtual_router_id 51
        priority 200
        advert_int 1
        authentication {
              auth_type PASS
              auth_pass 12345
        }
        virtual_ipaddress {
              10.10.98.10/16
        }
}

vrrp_instance VI_API {

        state BACKUP
        interface eth0
        virtual_router_id 51
        priority 150
        advert_int 1
        authentication {
              auth_type PASS
              auth_pass 12345
        }
        virtual_ipaddress {
              10.10.98.10/16
        }
}

BGP

Unifi Router.

ssh 10.20.0.1
configure
set protocols bgp 64512 parameters router-id 10.10.0.1
set protocols bgp 64512 neighbor 10.10.100.11 remote-as 64512
set protocols bgp 64512 neighbor 10.10.100.12 remote-as 64512
set protocols bgp 64512 neighbor 10.10.100.13 remote-as 64512
show protocols bgp
commit
save
exit