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sgjohnson

2,656 karma · joined August 8, 2018

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sgjohnson··on The Black-Scholes/Merton equation [video]
What workers are you even talking about?
sgjohnson··on The Black-Scholes/Merton equation [video]
Derivatives are a zero-sum game. If someone lost a trillion dollars trading them, someone else made a trillion dollars trading them. It will always result in a net 0.
sgjohnson··on U.S. rice exports to Haiti have unhealthy levels of arsenic, study finds
That’s life expectancy at birth (which is still 30th worst in the world), and it doesn’t incorporate getting shot in a random act of gang violence at the old age of 17.
sgjohnson··on U.S. rice exports to Haiti have unhealthy levels of arsenic, study finds
The Dominicans had it even worse, as they also had to fight for their independence from... Haiti.

But yeah, sure, let’s blame everything on the former colonial powers.

sgjohnson··on U.S. rice exports to Haiti have unhealthy levels of arsenic, study finds
> heavy metals that can increase risks of cancer and heart disease

I’d say this is the least of Haiti’s problems right now, as virtually nobody there is expected to live long enough to develop any cancer or long-term heart disease.

sgjohnson··on How SSH port became 22 (2017)
Yes, they do. Their mission hasn’t changed since IANAs inception.

But getting a port assignment these days is going to be virtually impossible. It’s probably not going to happen without at least a Proposed Standard RFC.

https://www.iana.org/assignments/service-names-port-numbers/...

There’s not a single RFC published that concerns redis. It’s not going to happen.

sgjohnson··on 250M-plus reserved IPv4 addresses could be released
I can’t comment on UI Edge routers, but my UDM SE has perfect IPv6 support. Which, granted, is a recent thing (full support for SLAAC arrived about 6 months ago), but no complaints from me about the UniFi line.
sgjohnson··on 250M-plus reserved IPv4 addresses could be released
> If Windows was changed to allow it at that point, today hardly anyone would be complaining that Ciscos or Junipers or other core routers don’t support it.

Yes. But it wasn’t. Making this proposal a day late and a dollar short.

sgjohnson··on 250M-plus reserved IPv4 addresses could be released
The guy I got my ASN no longer files them, but this guy also comes highly recommended.

https://ifog.ch/en/ip/lir-services

CHF 60/lifetime for natural persons , which is about $60.

The guy that did my ASNs still does IP space - https://my.cloudie.sh/index.php?rp=/store/lir-services

$10/y for a /40.

A bit more expensive than the $50/lifetime that I promised, but that was the deal I got from Cloudie.

sgjohnson··on 250M-plus reserved IPv4 addresses could be released
You can get an ASN and IP space from RIPE (or a RIPE LIR) even if you’re in ARIN area geographically.

All you need is proof of network presence within RIPE region (and yes, a $5/mo BGP VPS from Vultr satisfies that requirement). Then you can announce your RIPE v6 wherever you want.

sgjohnson··on 250M-plus reserved IPv4 addresses could be released
RIPE hands out a /29 to any member without any requirements. For anything beyond a /29 you need to prove that you actually need it, but /29s they hand out like candies. As a LIR you can then lease out /32s. And when you run out of space to lease, request more space.

I know a guy with 15x /29s.

I actually find this scary too, but I mean, it’s /29s, not /8s.

sgjohnson··on 250M-plus reserved IPv4 addresses could be released
My IP space is PA, it’s allocated by a LIR.

RIPE does have a requirement that you use your ASN, and that it’s multihomed.

Multihoming rule isn’t enforced (meaning a single upstream is fine), but they do require you to actually use it.

sgjohnson··on 250M-plus reserved IPv4 addresses could be released
RIPE, via a LIR, but it doesn’t matter, because ASNs are end-user resources. IP space is all PA though.

The /32 I’m renting however.

sgjohnson··on 250M-plus reserved IPv4 addresses could be released
My ISPs lack of support for IPv6 got me into BGP.

I now run my own ASN, rent a server with a BGP session that’s pretty close to my home (~50km/2ms), and tunnel v6 over that.

I have a /32 of v6. That’s 2^96 individual addresses. Or 65k /48s.

It was a great learning experience actually and is within the reach of anyone. You can get a BGP enabled VPS for $5/month, and ASN and a /40 for $50/lifetime.

sgjohnson··on 250M-plus reserved IPv4 addresses could be released
> I cannot tell you how many devices or software have had a notice of "just disable IPV6, that will fix X" and it's worked perfectly.

I’ve heard this advice dozens of times, but it hasn’t worked once, to the point where I firmly believe that everyone giving out such advice either completely doesn’t care or know anything about networking, or, is suffering from some sort of a mental difficulty.

sgjohnson··on 250M-plus reserved IPv4 addresses could be released
They won’t be released, because releasing them would literally wreak havoc on the IPv4 internet.

Releasing them could be the best thing for IPv6 to ever happen.

sgjohnson··on 250M-plus reserved IPv4 addresses could be released
It’s not going to happen. Plenty of routers and other equipment are hardcoded to not route to those addresses. Any time spent rectifying this is time wasted on just adopting IPv6.

Ping 240.whatever.whatever.whatever from Windows. You just can’t. General failure.

And Windows is not the exception here.

They can lobby all they want, all the effort is going to be in vain. Imagine having to debug a problem where your services are sitting on 240.0.0.0/4, but some customers have routers that just drop the packets to that destination. It’d be a nightmare and “get better networking gear” might not even be a solution, because their ISPs routers could also be doing that.

This proposal is provably worse than just adopting IPv6, because when IPv6 works, it just works. This? This would fragment the IPv4 internet with undefined behaviour.

If they really want more v4 space, they should advocate for yoinking the v4 space that e.g. the DoD, Daimler, Ford or Apple doesn’t use. And they have a lot of v4 space. But that’s also not going to happen, and one of the reasons why not would be similar. A lot of people are actually squatting on DoD space in their internal networks if they run out of 10/8.

sgjohnson··on DEF CON 32 Was Canceled. We Un-Canceled it
In New Jersey they can’t kick you out for card counting.
sgjohnson··on SI Units for Request Rate
how does kW/h even work? because W = J/s, making kW/h kJ/s/h.
sgjohnson··on DEF CON 32 Was Canceled. We Un-Canceled it
> And they are cheaters, but it is like saying thieves can make money.

Absolutely not. Using your brains to keep track of cards is not cheating in any way, shape or form. They are simply using all the available information and some pretty basic math to them to gain an advantage.

Calling card counters cheaters is like calling chess players with better knowledge of patterns than their opponents cheaters. They are not cheaters.

sgjohnson··on DEF CON 32 Was Canceled. We Un-Canceled it
And card counters.
sgjohnson··on SI Units for Request Rate
SI has several cursed units. My favourite of them is the kWh.

A watt is just a joule per second. Making 1 kWh === 3.6 MJ.

sgjohnson··on AWS charge for using IPv4 expected to bring $1B/year and speed up IPv6 adoption
> I cant imagine such setup w/o NAT actually.

If you had a /24 of v4, you easily could.

> SLAAC might be great thing for you, but not for others.

[citation needed]

sgjohnson··on AWS charge for using IPv4 expected to bring $1B/year and speed up IPv6 adoption
> keep ARP, ND wasn't a great idea after all

there's nothing wrong with ND and it addresses several security vulnerabilities, namely ARP cache poisoning. But the real reason why ARP was removed is because it's a layering violation.

> NAT support (because it's everywhere these days)

nothing at all is stopping you from doing NAT on IPv6, except for the fact that everyone hates NAT, even people that pretend that they like it.

> Correct DHCP support (SLAAC wasn't a great idea after all)

SLAAC is a great thing. Also, DHCPv6 also exists, which allows you to do exactly what DHCP lets you do. Android doesn't support DHCPv6, but that's not IPv6s fault.

- IPv6->IPv4 interop (one way)

There's no such thing as one-way communication if we're talking TCP. Besides, it's still fundamentally impossible if the other end has no idea what to do with the source address.

sgjohnson··on AWS charge for using IPv4 expected to bring $1B/year and speed up IPv6 adoption
AWS owns about 7% of the entire public IPv4 allocation space. There's no way this is going to slow down IPv6 adoption. Nobody likes NAT, especially when it comes to servers.
sgjohnson··on Apple declares last MacBook Pro with an optical drive obsolete
It depends. In most cases, if purchased, it is DRM free.
sgjohnson··on USCIS announces strengthened integrity measures for H-1B program
> Congress is considering a bill that would grant the Romeikes permanent status as legal residents, with a possible pathway to citizenship. U.S. Rep. Diana Harshbarger, R-Tenn., filed the bill on Sept. 12, and it is being reviewed by the House Judiciary Committee.

Jesus Christ. Might as well just amend the Cuban Adjustment Act to extend to people from several other countries at that point.

sgjohnson··on USCIS announces strengthened integrity measures for H-1B program
> EB-1 visas have priority dates in 2020.

Very few people qualify for an EB-1. They are far out of reach for most people.

sgjohnson··on USCIS announces strengthened integrity measures for H-1B program
> How did he make money during those 5 years?

Worked in jobs that didn’t ask for proof of employment authorization.

Being white also probably helped a lot. I’m actually willing to bet that most americans aren’t even aware that white people can also immigrate illegally.

sgjohnson··on USCIS announces strengthened integrity measures for H-1B program
How so? There’s a 100+ year wait on EB2 and EB3 Green Cards for people born in India. Only 7% of GCs can go to people of any one country. At the current cap of 49000, it means only 3400 EB2 GCs can actually be issued to Indians per year. An approved application doesn’t equate to a green card actually minted and issued. There’s a 12 year backlog on applications alone. (https://travel.state.gov/content/travel/en/legal/visa-law0/v...)

H1B is neither a green card nor a path to one.

There is one category that has no cap at all however. The “Immediate relative of a US citizen” one.

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