Teaching a cheap ethernet switch new tricks (2019) • Hacker News Board

Re: Teaching a cheap ethernet switch new tricks (2019)

#91

Post by garaetjjte » Tue, Sep 28, 2021, 12:21 AM UTC

toast0 wrote: post #87

garaetjjte wrote: post #83

Earlier quoted context omitted.

You just connect single pair, it should auto-negotiate if other device supports it, otherwise you need to set mode in network card settings manually. https://i.imgur.com/xIsJJiN.png

So just connect pin one and three to the white wire and two and six to the solid color wire on both ends and it should work as long as both ends are half-duplex? I would think the NICs would sense their own transmissions and declare a local collision?

I'm sorry, I got things mixed up. You're right there would a collision with their own transmission. So there needs to be circuit that cuts offs their RX port while it is transmitting.

Re: Teaching a cheap ethernet switch new tricks (2019)

#92

Post by phibz » Tue, Sep 28, 2021, 1:43 AM UTC

aksss wrote: post #84

EricE wrote: post #73

Earlier quoted context omitted.

There are phase bridges to ensure powerline signals are on both phases in the typical US house, and phase filters available that filter the powerline frequencies - they were originally conceived not so much for leaking out, but preventing noise from leaking in and interfering with powerline stuff. X10 users have used them for years - you can find them with vendors that specialize in dealing with the X10 community or…

Ethernet over coax? That’s some OG networking. Break out those 10base5 adapters from ur possibles box. I guess this is also the time to bring up the obligatory Ethernet over barbed wire solution: http://www.sigcon.com/Pubs/edn/SoGoodBarbedWire.htm

They're talking about MoCA, multimedia over coax. The standard is from 2006 and runs over regular household rg59 or rg6 coax.

That being said, I've worked with 10base5. Drilling for a vampire tap in an open elevator shaft is its own form of exciting.

Re: Teaching a cheap ethernet switch new tricks (2019)

#93

Post by phibz » Tue, Sep 28, 2021, 1:50 AM UTC

I just bought a Friendlyarm r4s two port gigabit rk3399 4GB linux SBC for $90 USD. It supposedly has hardware acceleration for networking. Though I see 910 Mbps vs the 950Mbps I was getting with the ATT router. I was able to acquire my EAP-TLS certs and can connect directly to the ONT. I even got ipv6 prefix delegation and wireguard working. Next up is transparent ad blocking a la pihole.

It's a fantastic device if all you need is 2 ports.

Re: Teaching a cheap ethernet switch new tricks (2019)

#94

Post by rootsudo » Tue, Sep 28, 2021, 2:02 AM UTC

The writing reminds me of a 2600 article. I miss those days. Super cool though! I'll pick one up, eventually :)

Re: Teaching a cheap ethernet switch new tricks (2019)

#95

Post by ggrothendieck » Tue, Sep 28, 2021, 2:37 AM UTC

WalterBright wrote: post #90

ggrothendieck wrote: post #88

Earlier quoted context omitted.

> Grace Digital bricked my three GD streaming devices If you are referring to a Reciva based internet radio the web site which powers them was shut down by the owner of that site, not by Grace Digital. Also, if it is similar to my CC Wifi Reciva based radio it is still possible to access existing presets on the radio although you can no longer add presets or modify them any more. When you power it on wait for the Net…

> If you are referring to a Reciva based internet radio the web site which powers them was shut down by the owner of that site, not by Grace Digital I am referring to that. I'm reduced to 3 presets. The disaster is that: 1. the device was critically connected to a resource that GD does not control 2. GD offers no way to change this dependency, no way to redirect it elsewhere, no way to change the presets, no way to a…

At the time that CCrane, Grace and others started offering internet radios everyone was using Reciva and articles at the time referred to it as the Microsoft of internet radio so I don't think anyone at the time could have expected its downfall. This was really regarded as the safe bet. Also Grace has not offered a Reciva based radio for quite a few years so you must have quite an old one and have gotten many years of use out of it.

The CC Wifi 3 I got to replace my CC Wifi does have some anti-obsolescence features. It can be used as a bluetooth speaker and it has a built in web server that you can connect into from a browser and manually enter the URLs of streams so even if the Skytunes backend goes defunct like Reciva did the radio should still be somewhat usable.

If your radio can receive bluetooth you could put your media on a uPnP server, access it using vlc on a smartphone and then from there send it via bluetooth to the radio using it as a bluetooth speaker. That is probably more convenient than mucking with the radio to select audio files since you can do it on your smartphone with a better user interface. Anyways, that is what I do.

Re: Teaching a cheap ethernet switch new tricks (2019)

#96

Post by sumedh » Tue, Sep 28, 2021, 3:53 AM UTC

josteink wrote: post #76

caminante wrote: post #27

Off-topic, but I just learned about another, practical networking utility, yesterday. "powerline adaptors" [0] Basically, buy these adaptors and for ~$100, you can have create a "wired" LAN connection using power outlets in a home. [0] https://www.techradar.com/news/the-best-powerline-adaptors

> Off-topic, but I just learned about another, practical networking utility, yesterday. "powerline adaptors" Their performance depends on the electrical wiring in your house. Ironically for me I’ve only managed to make them work on older electrical installations, and even then it was at best 802.11n speeds. In my current house (newly built 2018), I can’t even get them to handshake. I suspect it’s due to improved elec…

Does it work between two outlets in the same room. If that works but multi room does not then probably you have different circuits internally.

Re: Teaching a cheap ethernet switch new tricks (2019)

#97

Post by WalterBright » Tue, Sep 28, 2021, 4:44 AM UTC

ggrothendieck wrote: post #95

WalterBright wrote: post #90

Earlier quoted context omitted.

> If you are referring to a Reciva based internet radio the web site which powers them was shut down by the owner of that site, not by Grace Digital I am referring to that. I'm reduced to 3 presets. The disaster is that: 1. the device was critically connected to a resource that GD does not control 2. GD offers no way to change this dependency, no way to redirect it elsewhere, no way to change the presets, no way to a…

At the time that CCrane, Grace and others started offering internet radios everyone was using Reciva and articles at the time referred to it as the Microsoft of internet radio so I don't think anyone at the time could have expected its downfall. This was really regarded as the safe bet. Also Grace has not offered a Reciva based radio for quite a few years so you must have quite an old one and have gotten many years o…

> put your media on a uPnP server, access it using vlc on a smartphone and then from there send it via bluetooth to the radio using it as a bluetooth speaker.

Hertzshaffnocheinmal! What a contraption. Here's what I want:

1. plug a USB device in that has all my media files on it

2. push "shuffle"

3. push "play"

Like how CD players work. In fact, even steps 2 and 3 should be optional. It should just work when the USB device is plugged in.

Re: Teaching a cheap ethernet switch new tricks (2019)

#98

Post by rincebrain » Tue, Sep 28, 2021, 5:13 AM UTC

kragen wrote: post #44

geenew wrote: post #4

My main thought reading this as a non-network admin was of Mr Robot, and all the Linux installs on low level hardware used for hacks on that show. Very interesting read and lots of upside to what is discussed, but the thought of the uncountable, almost invisible operating systems running in a large network give me a odd feeling in the pit of my stomach. So many potential places for malfeasance to hide.

They're not potential; do you know about Intel ME, cellphone baseband firmware, Apple's new on-phone CSAM scanning plans, and yellow printer dots?

I think my favorite "you put cleverness where it didn't belong, and look what it got you" is the Xerox "oops we stored your scan compressed and our compression matched some characters as identical that weren't so the thing we scanned has characters substituted in the image". [1]

Honorable mention goes to:

- the Dell switch with the changelog note "if you had a device with a MAC starting with these bytes plugged in, the last N ports on the switch will stop working"

[1] - https://www.dkriesel.com/en/blog/2013/0802_xerox-workcentres...

Re: Teaching a cheap ethernet switch new tricks (2019)

#99

Post by myself248 » Tue, Sep 28, 2021, 5:41 AM UTC

bigiain wrote: post #89

matheusmoreira wrote: post #65

Earlier quoted context omitted.

Cyberpunk used to be fiction. It disgusts me when I realize I'm already living in it.

That feeling in the pit of your stomach when you realise you've been _building_ it hurts. I still feel complicit. I worked for a hardware startup in 2013/2014. Part of my role was to populate and run the private pacman server that the devices got their OS and software updates from (we ran ARCH, but didn't connect to the public ARCH pacman repos, because we had some hardware specific code and kernel mods we needed to…

Everyone on HN is building it. It is the purpose of this entire place. Don't feel alone.

Re: Teaching a cheap ethernet switch new tricks (2019)

#100

Post by axiolite » Tue, Sep 28, 2021, 5:44 AM UTC

An interesting read, but I just don't understand why ONIE was even desirable. Cheap OpenWRT switches+routers can do Wireguard as easily as any Linux system.