Rube Goldberg would be proud ...
25/04/22 15:58 Filed in: Systems Administation
Rube Goldberg was a cartoonist who has a character that invented fantastic chain reaction machines. I may have been channelling his muse for inspiration in getting around my latest NBN failure:
And so it begins …
- We moved house (Note: there is no such thing as an NBN relocation … its a fiction … its a cancellation and a new connection)
- When people order a static IP they really want the same one when they relocate it (see 1)
- The Sparkies came, the modem was turned off for a couple of hours … things didn't come back
And so it begins …
Building a backup link from stuff I mostly had on hand
My 'router' is a Ubiquiti UniFi Dream Machine (UDM) Pro that supports a failover network.
Step 1 buy an SPF+ Gigabit Ethernet (Ubiquiti UF-RJ45-1G)
Step 2 Configure failover mode on UDM Pro (Create a NEW network that uses the SPF+ interface)
Step 3 Even though the SPF+ module supports 100MBps, the UDM Pro will not operate that device at that speed. Plug a 10 / 100 / 1000 switch in to convert 1G to 100M.
Step 4 Use a TP-Link MR3020 in WISP mode to connect to the Ethernet and join a WiFi Network
Step 5 Use a Telstra Pre-Paid 4GX Modem to provide Internet
Step 6 Curse Carrier Grade NAT (CGNAT) - basically this is the type of NAT you don't want as basically it means that there is no way to connect from the Internet to you
Step 7 Create a VPN to a service which does port forwarding
At this point you can provide services from devices inside your network eg. receive mail on your mail server
Conclusion
Doable but far from ideal … the technician is coming tomorrow