OPNsense

installation

prerequisite

• serial-cable / female<>female (null-modem)
• https://de.wikipedia.org/wiki/RS-232#Verkabelung_und_Stecker
  • RX-TX (Pin2/Pin3) crossed
  • GND <> GND
• putty
  • speed 115200
  • installer:opnsense

aim

              Internet                 Internet
                 :                         :
     DSL-Provider:(2.5Mbit/s)  LTE-Provider:(100GB/month)
                 :                         :
                 :                         :
             .---+----.               .----+-----.
             |fritzBox|  NAT-Routers  | SpeedBox |
             '---+----'               '----+-----'
                 |                         |
         192.168.178.1/24            192.168.0.1/24
                 |                         |
               DHCP                       DHCP
                 |                         |
                 |      .----------.       |
                 +-WAN--| OPNsense |--LTE--+
                        '----+-----' 
                             |
                            LAN 
                       192.168.1.1/24
                             |
                            DHCP
                             |
                             |
                     ...-----+-----...
                     (Clients/Servers)

• DSL speed is very low, switch to LTE
• LTE data-volume is limited, failover to DSL
• cache windows updates to save bandwidth and download-volume