Facebook-owned sites were down • Hacker News Board

Re: Facebook-owned sites were down

#911

Post by daniellehmann » Mon, Oct 04, 2021, 9:50 PM UTC

antocv wrote: post #872

Its alive! drill @1.1.1.1 www.facebook.com ;; ->>HEADER ;; ANSWER SECTION: www.facebook.com. 3401 IN CNAME star-mini.c10r.facebook.com. star-mini.c10r.facebook.com. 3403 IN A 31.13.72.36

See e.g. https://www.digwebinterface.com/?hostnames=facebook.com&ns=a... for responses from different nameservers.

Re: Facebook-owned sites were down

#912

Post by gunshai » Mon, Oct 04, 2021, 9:51 PM UTC

osrec wrote: post #900

gunshai wrote: post #887

Posting this comment will be like farting into a hurricane, but here goes. Company like Facebook has a serious problem and their stock drops ... precipitously. CEO of said company instead of selling their equity in their company has taken out loans against their equity in order to decrease their tax burden and cash in on the value of their equity. What amount of decrease would cause a margin call from lenders for the…

Margin calls don't really exist as far as loans are concerned. Once you have agreed collateral, and an agreed schedule of payment, you only get in trouble if you miss a payment, regardless of how the collateral fluctuates in value.

Okay, but as the value of the collateral approaches 0 your lender asks you to increase your collateral correct?

Re: Facebook-owned sites were down

#913

Post by wolverine876 » Mon, Oct 04, 2021, 9:52 PM UTC

rootusrootus wrote: post #764

Animats wrote: post #628

There's still no connectivity to Facebook's DNS servers: > traceroute a.ns.facebook.com traceroute to a.ns.facebook.com (129.134.30.12), 30 hops max, 60 byte packets 1 dsldevice.attlocal.net (192.168.1.254) 0.484 ms 0.474 ms 0.422 ms 2 107-131-124-1.lightspeed.sntcca.sbcglobal.net (107.131.124.1) 1.592 ms 1.657 ms 1.607 ms 3 71.148.149.196 (71.148.149.196) 1.676 ms 1.697 ms 1.705 ms 4 12.242.105.110 (12.242.105.110)…

I just got off a short pre-interview conversation with a manager at Instagram and he had to dial in with POTS. I got the impression that things are very broken internally.

This person has a POTS line in their current location, and a modem, and the software stack to use it, and Instagram has POTS lines and modems and software that connect to their networks? Wow. How well do Instagram and their internal applications work over 56K?

Re: Facebook-owned sites were down

#914

Post by joshmlewis » Mon, Oct 04, 2021, 9:52 PM UTC

gunshai wrote: post #887

Posting this comment will be like farting into a hurricane, but here goes. Company like Facebook has a serious problem and their stock drops ... precipitously. CEO of said company instead of selling their equity in their company has taken out loans against their equity in order to decrease their tax burden and cash in on the value of their equity. What amount of decrease would cause a margin call from lenders for the…

I don't know much about this but from the limited amount of I've read it is probably only a portion of the equity owned, and generally when borrowing against an asset the lender will not give you 100% of that assets value to protect from downside risk. Another probability is that it was adjusted in the past, potentially year(s) ago, and FB's stock price a year ago was almost $100 a share less than current so a $10 drop is not a big deal in the long term.

You raise an interesting question though and I'd like to know the answer as well!

Re: Facebook-owned sites were down

#915

Post by MichaelBurge » Mon, Oct 04, 2021, 9:52 PM UTC

osrec wrote: post #900

gunshai wrote: post #887

Posting this comment will be like farting into a hurricane, but here goes. Company like Facebook has a serious problem and their stock drops ... precipitously. CEO of said company instead of selling their equity in their company has taken out loans against their equity in order to decrease their tax burden and cash in on the value of their equity. What amount of decrease would cause a margin call from lenders for the…

Margin calls don't really exist as far as loans are concerned. Once you have agreed collateral, and an agreed schedule of payment, you only get in trouble if you miss a payment, regardless of how the collateral fluctuates in value.

I currently have a $150k margin loan, and it absolutely will lead to forced liquidation if the collateral drops in value: Interactive Brokers was clear about that.

Separately, my bank tried to sell me a "Pledged Asset Line of Credit" that would also have required the collateral to maintain a certain value or there would be forced liquidations.

Can you link an example of a bank or similar that lets you borrow against stock or options collateral without margin call risk?

Re: Facebook-owned sites were down

#916

Post by ctur » Mon, Oct 04, 2021, 9:52 PM UTC

It's back as of approx 14:47 PST.

Re: Facebook-owned sites were down

#917

Post by simonklitj » Mon, Oct 04, 2021, 9:53 PM UTC

kblev wrote: post #879

antocv wrote: post #872

Its alive! drill @1.1.1.1 www.facebook.com ;; ->>HEADER ;; ANSWER SECTION: www.facebook.com. 3401 IN CNAME star-mini.c10r.facebook.com. star-mini.c10r.facebook.com. 3403 IN A 31.13.72.36

"Sorry, something went wrong. Facebook © 2020"

Yes, even Facebook falls prey to the wrong copyright year. Anyway, I got further now to a page that says "Account Temporarily Unavailable." and has the old Facebook layout. Would love a peek inside the Facebook codebase to see how this happens, hah!

Re: Facebook-owned sites were down

#918

Post by soneil » Mon, Oct 04, 2021, 9:53 PM UTC

cranekam wrote: post #743

yoelo wrote: post #653

Earlier quoted context omitted.

Seriously? Is that how it works?

No. A network like Facebook's is vast and complicated and managed by higher-level configuration systems, not people emailing patches around. If this issue is even to do with BGP it's much more likely the root of the problem is somewhere in this configuration system and that fixing it is compounded by some other issues that nobody foresaw. Huge events like this are always a perfect storm of several factors, any one or…

The fun part of BGP is they apparently make a lot of use of it within their network, not just advertising routes externally.

https://engineering.fb.com/2021/05/13/data-center-engineerin...

(and yes, fb.com resolves)

Re: Facebook-owned sites were down

#919

Post by josalhor » Mon, Oct 04, 2021, 9:53 PM UTC

facebook.com resolves again!

> ping facebook.com

PING facebook.com (31.13.83.36) 56(84) bytes of data.

64 bytes from edge-star-mini-shv-01-mad1.facebook.com (31.13.83.36): icmp_seq=1 ttl=54 time=12.2 ms

64 bytes from edge-star-mini-shv-01-mad1.facebook.com (31.13.83.36): icmp_seq=2 ttl=54 time=12.1 ms

64 bytes from edge-star-mini-shv-01-mad1.facebook.com (31.13.83.36): icmp_seq=3 ttl=54 time=11.7 ms

Can't yet traceroute to a.ns.facebook.com tho

Re: Facebook-owned sites were down

#920

Post by dtnewman » Mon, Oct 04, 2021, 9:53 PM UTC

osrec wrote: post #900

gunshai wrote: post #887

Posting this comment will be like farting into a hurricane, but here goes. Company like Facebook has a serious problem and their stock drops ... precipitously. CEO of said company instead of selling their equity in their company has taken out loans against their equity in order to decrease their tax burden and cash in on the value of their equity. What amount of decrease would cause a margin call from lenders for the…

Margin calls don't really exist as far as loans are concerned. Once you have agreed collateral, and an agreed schedule of payment, you only get in trouble if you miss a payment, regardless of how the collateral fluctuates in value.

That might be true for a house or a small scale loan, but once you are dealing with billions I doubt that’s the case. I assume that it works as follows: you have $1b in stock, Bank gives you $500m line of credit. If stock goes down enough they force a sale, but they only sell against what you have actually Utilized in your line of credit. If you are Mark Zuckerberg and worth more than $100 billion, you probably don’t have any issues. If you add up all of his houses and planes and cars it probably doesn’t add up to more than 1% of that. He’s fine.