Author Topic: Ethernet on/off switch  (Read 5719 times)

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Offline capt bullshot

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Re: Ethernet on/off switch
« Reply #25 on: June 15, 2018, 05:46:01 am »
IMHO, the best way to sever an Ethernet connection is to reset PHY (by simply driving the reset pin low) - much easier to do than relays.

Yes, I agree. In case the reset pin is accessible for a particular PHY.
Safety devices hinder evolution
 

Offline totalmedtech

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Re: Ethernet on/off switch
« Reply #26 on: July 27, 2018, 10:56:04 pm »
how about a simple on/off switch? along the cable u can place it somewhere handy...
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Offline kaevee

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Re: Ethernet on/off switch
« Reply #27 on: September 19, 2018, 02:23:25 am »
Hi Monkeh,
Actually these mini routers would be OK given that I could change the OpenWRT code to send to various on/off devices
but I'd still need to make a device to send to.

https://www.gl-inet.com/ar300m/

If you go with "OpenWRT" based mini routers route, you may or may not need any other hardware depending on the security you are looking for.

No Hardware
One can add / remove a port programmatically. This can be done remotely through your monitoring system without any additional hardware. OpenWRT exposes a extensive management API over HTTP/HTTPS protocol. The management port can be on a different VLAN for additional security.

Hardware/Side Band
Almost all the "OpenWRT" based mini routers I have worked with have a serial console, but headers are not populated on the board. Some times, there may be tiny amount of rewiring needed to enable serial console. Once you have serial console, you have a side band access to the router(s) in question. OpenWRT exposes a console based management API for managing the routers, allowing you to remove the port(s) from active VLAN. You are free to use any hardware/software combo to access serial console.
« Last Edit: September 19, 2018, 02:46:13 am by kaevee »
 

Offline Red Squirrel

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Re: Ethernet on/off switch
« Reply #28 on: September 28, 2018, 12:47:15 pm »
If this is for security, I would do something fully mechanical with feedback.  Maybe a screw drive type servo that plugs/unplugs a cable from a jack. (remove locking pin).  If it's sold as a device the selling point would be 100% isolation and visibly unplugged. (have the case transparent) as well as feedback if it's done remotely. Could use hall effect sensors or something to detect position.  I don't think anything like this exists, I could see a niche market for it.  Say you have an air gaped network that you want to connect temporarily to transfer data you'd activate it to do the transfer then deactivate it.
 

Offline kaevee

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Re: Ethernet on/off switch
« Reply #29 on: September 28, 2018, 01:51:29 pm »
If this is for security, I would do something fully mechanical with feedback.  Maybe a screw drive type servo that plugs/unplugs a cable from a jack. (remove locking pin).  If it's sold as a device the selling point would be 100% isolation and visibly unplugged. (have the case transparent) as well as feedback if it's done remotely. Could use hall effect sensors or something to detect position.  I don't think anything like this exists, I could see a niche market for it.  Say you have an air gaped network that you want to connect temporarily to transfer data you'd activate it to do the transfer then deactivate it.

Cost could be a big factor with totally mechanical approach. How many people would need that kind of security?

Why not simply power off the Ethernet switch by interfacing with an MCU controlled switch? The whole solution might cost $25 including the 4 port 10/100 Ethernet switch.

Venkat
 

Online CJay

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Re: Ethernet on/off switch
« Reply #30 on: September 28, 2018, 02:16:16 pm »
Nah, put it in an acrylic box, snip off the retention clip and have a servo push/pull the cable into and out of the socket. I bet I could do that for under $20
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Offline 1276-2449-1-ND

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Re: Ethernet on/off switch
« Reply #31 on: October 16, 2018, 10:11:34 pm »
This summer I put my kids computers on their own switching hub, and plugged it into a $10 Harbor Freight remote-control outlet switch. Now (mysteriously) their internet goes out when they start acting like little shits. And it (mysteriously) comes back on when they're better behaved. It's funny watching them try to control themselves lest they displease the capricious Internet Gods.
 


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