Mikrotik automatic VPN/dynamic DNS (first version)

# Notes:
# - "corpVPN" is the name of the "/interface ovpn-client" item which
#   "dials into" the corporate VPN server
# - 10.0.0.4 and 10.0.0.5 are the internal DNS servers
# - This works, but I ended up finding a cleaner way to do it.

/system script add name=vpn-up source={
    :local ifName [/interface get $interface name]
    :if ( $ifName = "corpVPN" ) do={
        :log info "VPN UP setting corp DNS"
        /ip dhcp-client set 0 use-peer-dns=no
        /ip dns set servers=10.0.0.4,10.0.0.5
    }
}

/system script add name=vpn-down source={
    :local ifName [/interface get $interface name]
    :if ( $ifName = "corpVPN" ) do={
        :log info "VPN DOWN setting dynamic DNS"
        /ip dhcp-client set 0 use-peer-dns=yes
        /ip dns set servers=""
    }
}

/system script add name=rebooted source={
    :log info "REBOOTED setting dynamic DNS"
    /ip dhcp-client set 0 use-peer-dns=yes
    /ip dns set servers=""
}

/ppp profile set [find] on-up=vpn-up on-down=vpn-down
/system scheduler add name=rebooted start-time=startup on-event=rebooted