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Hunting for North Korean Fiber Optic Cables

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Re: Hunting for North Korean Fiber Optic Cables

#21

Do those small utility boxes alongside the tracks make sense for fiber optic? I expected things like that to be larger, if only because fiber has a minimum bend radius. Edit: Good article though, I enjoyed it a lot.

The min bend radius isn’t that large in my experience. On the order of 10cm IIRC, possibly even less.

Re: Hunting for North Korean Fiber Optic Cables

#22

Do those small utility boxes alongside the tracks make sense for fiber optic? I expected things like that to be larger, if only because fiber has a minimum bend radius. Edit: Good article though, I enjoyed it a lot.

The min bend radius isn’t that large in my experience. On the order of 10cm IIRC, possibly even less.

Much smaller than that, some might even say a utility box is overkill: https://old.reddit.com/r/techsupportgore/comments/nvwcuh/the...

Re: Hunting for North Korean Fiber Optic Cables

#23

Do those small utility boxes alongside the tracks make sense for fiber optic? I expected things like that to be larger, if only because fiber has a minimum bend radius. Edit: Good article though, I enjoyed it a lot.

Fiber’s perfectly happy being joined in 12” by 16” boxes for small runs. The terminal box in my garage has a few loops and is more like 6” x 8”.

https://www.seeclearfield.com/fiber-optic-wall-box/metal-wal...

Re: Hunting for North Korean Fiber Optic Cables

#24

Earlier quoted context omitted.

How cunning and evil it is that America funded the internet and then allowed it to spread around the world. If you're worried about "absolute control over digital systems", notice how many standards get published describing how those digital systems work -- you're welcome to reimplement them if you'd like more control.

The Roman Empire built lots of roads wherever they went and the British Empire built lots of rail networks.

What I'm saying is this: there's nothing stopping you from using communication methods that aren't controlled by Americans. All of the protocols that the internet uses are documented.

Re: Hunting for North Korean Fiber Optic Cables

#26

Earlier quoted context omitted.

The Roman Empire built lots of roads wherever they went and the British Empire built lots of rail networks.

The Roman Empire merely improved roads in many places. Gaul already had a road system, and the Greek and Egyptian spheres did too.

>The Roman Empire merely improved roads in many places.

why did they invest in those roads? They weren't a charity.

Re: Hunting for North Korean Fiber Optic Cables

#27
post #18

Earlier quoted context omitted.

DPRK can certainly get however many IP addresses they want, DPRK just doesn't have that much infrastructure that they want externally accessible. As far as I know, end-user traffic from within North Korea usually does not originate from those few IP addresses. Or at least not visibly so, they might be connecting to a proxy from a DPRK IP address.

"DPRK can certainly get however many IP addresses they want" IP4 is quite limited as far as I know and not given out freely since a long time, or what do you mean here?

IPv4 continues to be available to entities that have a need that fits a particular policy shape, just most people don't. Specifically, you can get IPv4 /24s for IPv6 transition purposes. This includes anycast DNS, MX, etc for legacy clients on other networks, v4-side of CGNAT, etc.

E.g. I was able to get a /24 in the ARIN region in 2021 and could justify 2 more for a _logical_ network topology similar to what NK presents to the world.

APNIC similarly has a pool available for IPv4 allocations: https://www.apnic.net/manage-ip/ipv4-exhaustion/#the-situati...

Re: Hunting for North Korean Fiber Optic Cables

#28

Do those small utility boxes alongside the tracks make sense for fiber optic? I expected things like that to be larger, if only because fiber has a minimum bend radius. Edit: Good article though, I enjoyed it a lot.

The min bend radius isn’t that large in my experience. On the order of 10cm IIRC, possibly even less.

Even less is correct: outdoor fibers (G.652.D) have a minimum bend radius of about 30mm. The indoor counterpart (G.657.A1 and A2) have 10mm and 7.5mm.

Re: Hunting for North Korean Fiber Optic Cables

#29
post #18

Earlier quoted context omitted.

DPRK can certainly get however many IP addresses they want, DPRK just doesn't have that much infrastructure that they want externally accessible. As far as I know, end-user traffic from within North Korea usually does not originate from those few IP addresses. Or at least not visibly so, they might be connecting to a proxy from a DPRK IP address.

"DPRK can certainly get however many IP addresses they want" IP4 is quite limited as far as I know and not given out freely since a long time, or what do you mean here?

IPv4 is readily available and not very expensive. DPRK can just buy or lease them.
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