probably tmi but any / all of the following:
- SSH (direct or tunnels)
- VNC (usually over ssh or VPN)
- RDP (usually over ssh or VPN)
- VPN (openvpn or ipsec)
- MicroTik Router at home with site-to-site VPN to my DC and Office
- Mobile Hotspot (always a must when traveling)
- Last resort: Dial direct with 56.6kbps modem to DC when there is an internet uplink failure or DDoS attack.