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Turn on your PC remotely with a smartphone connected via 4G.

little boy62 Posted messages 4 Registration date   Status Member Last intervention   -  
brupala Posted messages 111189 Registration date   Status Member Last intervention   -

Hello.

Here, I've created a (resolved) topic for turning on your PC remotely with a smartphone, on the same network: https://forums.commentcamarche.net/forum/affich-37872695-allumer-son-pc-a-distance#dernier

I'm looking to do the same thing:

Turn on your PC remotely, but this time: with a smartphone connected via 4G.

Is that possible?

What are the ways to achieve this?

Because the goal is indeed to turn it on when I'm not nearby.

Already in the first topic, I was a novice.

This is: Meeting in unknown territory

In summary: how to turn on a PC remotely with a smartphone that are not on the same network.

Thanks to all.

++


As a wise man once told me: "In France, you can do anything....
Just don't get caught."

7 answers

  2.
    kaumune Posted messages 22605 Registration date   Status Contributor Last intervention   5 160
     

    Hi

    You do the same thing as locally, but instead of entering the IP address of the PC to wake up, you use the public IP address of the router to which that PC is connected.

    So elements to use in your WOL app:

    Public IP address of the router

    MAC address of the PC to wake up

    The only problem is that the magic packet must pass through your router.

    If there isn't an option in the box's configuration for this, you might not succeed.

    With SFR, apparently, there is also the option Proxy Wake on LAN, like with Free, in Network v4>NAT

    A magic packet is a data frame Ethernet containing the bytes FF FF FF FF FF FF followed by sixteen repetitions of the MAC address of the PC to wake up.

    It's the wake-up app that composes and sends this frame.

    Finally, to wake mine up while on 4G, I use the WAN part of this app

    1
  3. little boy62 Posted messages 4 Registration date   Status Member Last intervention   1 790
     

    Yo.

    I've already been told about this.

    Except that I'm with SFR: this option doesn't exist, unfortunately.

    So, back to square one.

    Thanks ;)

    ++

    As a wise man once said: "In France, we have the right to do anything...
    You just have to not get caught."

    0
    1. barnabe0057 Posted messages 14329 Registration date   Status Contributor Last intervention   4 929
       

      Hello little boy62,

      Don't you have a Raspberry lying around somewhere?

      You could have installed a VPN in "bridge" mode on it.

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      1. little boy62 Posted messages 4 Registration date   Status Member Last intervention   1 790 > barnabe0057 Posted messages 14329 Registration date   Status Contributor Last intervention  
         

        Lu'

        Unfortunately: no.

        A buddy told me about this: https://www.amazon.fr/dp/B073TSK26W?ref_=cm_sw_r_cp_ud_dp_9VMXSXT6P4M3V9WY7YY9_2

        He uses it.

        Apparently, the only issue is that you have to know how to configure it.^^

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      2. brupala Posted messages 111189 Registration date   Status Member Last intervention   14 462 > little boy62 Posted messages 4 Registration date   Status Member Last intervention  
         

        that's a VPN client, rather a remote NAT, not a server.

        in any case, with CGNAT, you won't have access to any VPN server or anything else at home in IPv4, only in IPv6.

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  4. little boy62 Posted messages 4 Registration date   Status Member Last intervention   1 790
     

    Lu'

    And thanks for your response.

    However, the NAT options do exist, but not on all SFR BOXes.

    On mine; they are not available.

    I put my PC in sleep mode

    - On LAN: it works.

    - On WAN with my mobile on 4G: failure.

    Even though I correctly set the public IP of the BOX and the MAC address of the concerned PC.

    So, I think, as you mentioned earlier, that the magic packet does not pass through the BOX ^^

    ++ :)

    As a wise man told me: "in France, we have the right to do anything....
    We just have to avoid getting caught."

    0
  6. brupala Posted messages 111189 Registration date   Status Member Last intervention   14 462
     

    Hello,

    at SFR, your IPV4 box may be behind a CGNAT (shared public IP and private IP on the box's WAN).

    You then need to request a real public ipv4 from SFR or switch to IPV6, but I'm almost sure that your WOW (wake on wan) software doesn't support IPV6.

    And there you go ....

    But damn, those line breaks are annoying !!

    0
  7. little boy62 Posted messages 4 Registration date   Status Member Last intervention   1 790
     

    Lu'

    I think I'm going to give up on remotely starting the PC with a 4G phone.

    Here is the configuration page of the box:

    => https://i.imgur.com/xI7P9By.png

    Here is the image of another box

    https://la-communaute.sfr.fr/t5/image/serverpage/image-id/158866iBBF5DAF00B1381BA/image-size/large/is-moderation-mode/true?v=v2&px=999

    there, I could have done something.

    I have the impression that SFR has removed some useful features.

    => for example: my box does not have IPV6

    In any case, thank you for the answers.

    ++

    As a wise man told me: "In France, we have the right to do anything....
    You just have to not get caught."

    0
    1. brupala Posted messages 111189 Registration date   Status Member Last intervention   14 462
       

      If you don't have ipv6, it's because you're not in cgnat.

      Moreover, contrary to what you say, you indeed have the NAT configuration:

      UPnP, port forwarding, port triggering, and DMZ are all NAT functions configurable in ipv4.

      DMZ is also a firewall concept in both ipv4 AND ipv6.

      However,

      it's not obvious that the box knows how to do WOL proxy.

      Is it actually a cable box?

      0
      1. little boy62 Posted messages 4 Registration date   Status Member Last intervention   1 790 > brupala Posted messages 111189 Registration date   Status Member Last intervention  
         

        Hello.

        I don't think we can talk about a cable box.

        Basically, I'm on a fiber connection with coaxial termination. ^^

        And the BOX: it's the SFR THD BOX.

        In any case, thank you for your input.

        I sincerely believe that with all the goodwill in the world, I would struggle to "wake up" a PC with a 4G smartphone.

        ++

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      2. brupala Posted messages 111189 Registration date   Status Member Last intervention   14 462 > little boy62 Posted messages 4 Registration date   Status Member Last intervention  
         

        Coaxial termination fiber, that's the cable.

        Other names: FTTLA, FTTB, fake fiber.

        The main characteristic is a very low upload speed compared to real FTTH fiber.

        This is a network being dismantled by SFR to migrate customers to FTTH, the real fiber.

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    2. kaumune Posted messages 22605 Registration date   Status Contributor Last intervention   5 160
       

      In your post <9>, it’s more the port triggering and port forwarding parts that you should show us.

      0
      1. little boy62 Posted messages 4 Registration date   Status Member Last intervention   1 790 > kaumune Posted messages 22605 Registration date   Status Contributor Last intervention  
         

        Hi there ;)

        For the port triggering, it's empty ^^

        https://i.imgur.com/lUTmxO1.png

        For the port forwarding, it's....empty too

        https://i.imgur.com/OetFXgl.png

        For the port forwarding, I have various services available:

        https://i.imgur.com/mlQSANc.png

        https://i.imgur.com/ycDAvom.png

         It's a network being dismantled by SFR, to migrate customers to FTTH, the real fiber.

        I know. I don't know if SFR will contact us or if it's us who will have to take the steps.

        At worst, since a company has wired my street, it will just take the SFR technician to add a fiber optic socket.

        PS: sorry if I'm not using the right terms, I know nothing about it :P

        0
  8. little boy62 Posted messages 4 Registration date   Status Member Last intervention   1 790
     

    Yo.

    I'm bouncing back one last time (not that hard with my nicely rounded belly lol)

    while browsing the settings page of my box, I came across this

    =>

    Is it a glimmer of hope or a waste of time? :P

    ++

    As a wise man once told me: "In France, you can do anything....
    You just have to avoid getting caught."

    0
    1. kaumune Posted messages 22605 Registration date   Status Contributor Last intervention   5 160
       

      According to what I could read on the internet, your box suffers from the same problem as the Liveboxes.

      Wake On Wan only works within 10 minutes after the PC is turned off.

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      1. little boy62 Posted messages 4 Registration date   Status Member Last intervention   1 790 > kaumune Posted messages 22605 Registration date   Status Contributor Last intervention  
         

        In 4G, it doesn't work to the exact second ^^

        Otherwise, on Wi-Fi (Wol), I put the PC into sleep mode: it works, no matter the delay.

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      2. brupala Posted messages 111189 Registration date   Status Member Last intervention   14 462 > little boy62 Posted messages 4 Registration date   Status Member Last intervention  
         

        yes, but it's not the same system:

        You’re not very sharp on networks, but I'll explain anyway:

        The WOL frame is an ethernet broadcast with a destination mac address of ff-ff-ff-ff-ff-ff, so everyone receives it, then it's the mac address specified in the data that should respond if it's set up to expect this kind of frame; locally it broadcasts well, whether it's wifi or ethernet.

        But from a distance, over the internet, we go through a bunch of routers, whose main job is to block these broadcasts to avoid saturating the network.

        From a distance, we will then use a regular UDP packet to the destination IP address of the box, it arrives at the box, but this is where it gets tricky if it’s not designed for it (proxy function) because it doesn't know where to send it, at least in ipv4.

        You can indicate it by forwarding the chosen UDP port to an IP address on the local network or by configuring an address in DMZ (which redirects all IP packets not in the NAT table to that address).

        This is where we run into another problem: although the destination will be everyone (broadcast), most boxes need to know the mac address of the machine in question to route an ipv4 packet, so it must be in their ARP cache.

        Unfortunately, the ARP cache is about 5 minutes on average, rarely configurable, so it requires a static ARP, but few boxes allow configuring a static ARP; it exists on advanced routers, but not on boxes, perhaps we can bypass it with a static DHCP, but it's not a sure thing as they are two different functions, although usually leading to the same data (there's more info in DHCP).

        If the box is lucky enough to have a WOL proxy, no problem, it generates a broadcast from the received WOL UDP packet without questioning the destination, since it will be everyone.

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