There's not a single scenario where a traffic this size to an internal buildbot machine to/from a single unknown resident IP is legit.
I've taken multiple cellphone connections and sorta merged their connections using a hacky workaround in windows to force it to happen even without a proper setting for it. (Note: Not a bridge. Merged. Sorta.)
Just setup each phone as a shared access point through multiple usb ports and let er rip. After doing what I was mentioning though that is.
It's rather simple too, but I don't know how best to explain how it works. BUT I can tell you what I did.
I disable and re-enable each connection one after the other back and forth multiple times until they all are send and receiving data at the same time. This seems to work best when there is already an active connection going. I would use this for Steam downloads a lot.
And yes, all my files I send and receive this way would come and go proper and working. I was doing this back when cell speeds were more like 3mbit/second out in the rural areas. That kind of thing. So getting 10mbit out in the boonies was like living in the city all of a sudden.
they would use a terrestrial connection but the National Broadband Network in Australia is arguably incomplete (putting aside the parts that are supposed to be complete are often very crap). One of my workmates lives 25 mins drive from the WA capital city CBD and has just recently bought Starlink because he couldn't get fast enough or reliable enough internet speeds at home for WFH purposes (Ms Teams is bad but not THAT BAD)
Yeah, Canada is pretty bad too when it comes to having the last mile rolled out to every last town and village. We have tower based internet for those usually. If you are really out in the boonies, you might have something based on Xplornet's tech. Having starlink is only a new thing recently; and that's apparently touch and go for people as well.
Ironically, if you don't play video games at all, Cellular is the best kind of connection you can get out there in some places. Otherwise, get a dish and point it at the nearest tower. It's still basically a giant wifi connection at that point, so the latency will not be the best; but it's far better than Xplornet or cellular ever will be on that front. The only thing better than tower, is a proper line going to the house.
One of my old homes was supposed to have said line installed to that town as part of a province wide thing going on at the time. Sasktel was supposed to get EVERYONE connected with cable and internet...
That never happened. They stuck to the cities and bigger towns close to the backbone, and that was it. They then sold access to companies putting up towers and said "that's a wrap".
That said... they had to contend with the rail lines to get past them on multiple occasions, and that gets expensive.
Unfortunately the NBN organisation itself is a massive boondoggle (see also Australian politics for the last 10+ years) and their idea of 'coverage' often could be beaten handily by a pigeon and some string.
So people pay through the nose for alternatives like Telstra mobile broadband or starlink and given the current neoliberal firesale gov I'd say that's an intentional outcome...
https://unitiwireless.com/internet/fixed-wireless-residentia...
To name a few
NBN is a backup. I get maybe 18mbps from that connection on a good day.