Beantwoord

Devices on the local network get assigned IPs from external provider

  • 25 oktober 2020
  • 7 reacties
  • 94 keer bekeken

Hello,

  I am a Ziggo customer for the internet at 500/40 Mbps. I recently noticed that for some peculiar reason my devices get assigned IPs from an unknown IP range. My modem is set to a different IP network range.  Why is this happening?

  When i traceroute the devices that get the IP range from that unknown network, i see the traffic running through glassoperator while if i explicitly set my devices to the network settings of my local modem, the traceroute path is completely different.

 

I don’t like at all the fact that my private network is not private at all and i would really appreciate if i can get an official response with details as to why exactly this is happening and for what reason. I am considering to seek legal advice if the answer is not justified at full

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Best beantwoord door pkatsou 25 oktober 2020, 17:40

Oh wow, i removed my powerline from the modem and the problem disappeared.

That is super weird, how did the power line NIC had such an effect? Are all the power connections throughout the building unified?

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7 Reacties

I’m not entirely sure what you are trying to say here. Are you talking about getting “abnormal” IP adresses in your LAN, and a different routing to external sites?

If that’s the case there should be a second iternet connection/router active in your network. Do you have a second internet connection?

If not, are you using powerline network adapters? We’ve seen cases where powerline adapters connect to the network of your neighbours for instance. Remove the powerline adapters and see if your problem is solved.

I’m not entirely sure what you are trying to say here. Are you talking about getting “abnormal” IP adresses in your LAN, and a different routing to external sites?

If that’s the case there should be a second iternet connection/router active in your network. Do you have a second internet connection?

If not, are you using powerline network adapters? We’ve seen cases where powerline adapters connect to the network of your neighbours for instance. Remove the powerline adapters and see if your problem is solved.

 

Hello,

Thanks for replying. What i am saying is that my router has a DHCP setting defined and it provides IPs to the range of let’s say 192.168.178.* with gateway and DNS obviously being the first IP. I noticed that at random times some of my devices get IPs in the range of 192.168.1.* with a gateway of 192.168.1.1 which is a network that i do not recognise within the scope of my local lan. I forgot to mention that when i try to open 192.168.1.1 i was getting a weird login page for a device that i do not recognise. I just tried today this page and i can’t seem to connect to it though.

 

 Now if i traceroute while on this unknown network i get the following

(wherever you see 000 i have replaced the Actual IPs or identifying numbers to reduce exposure of information)

$ traceroute ziggo.nl
traceroute to ziggo.nl (213.46.237.24), 64 hops max, 52 byte packets
 1  192.168.1.1 (192.168.1.1)  6.221 ms  5.265 ms  5.398 ms
 2  0-000-000-000.ftth.glasoperator.nl (000.000.000.000)  10.486 ms  11.417 ms  12.164 ms
 3  000.000.000.000 (000.000.000.000)  13.592 ms  12.278 ms  14.621 ms
 4  000.000.000.000 (000.000.000.000)  10.338 ms  11.351 ms  10.148 ms
 5  liberty-gw.att.cw.net (000.000.000.000)  23.991 ms  11.517 ms  12.098 ms
 6  nl-ams02a-rc2-lag-000-0000.aorta.net (000.000.000.000)  12.196 ms  11.163 ms  11.839 ms
 7 nl-ams02a-ra5-be-000-0000.aorta.net ( 000.000.000.000 ) 11.276 ms 11.857 ms 13.774 ms
 8   000.000.000.000 ( 000.000.000.000 ) 15.448 ms 15.056 ms 11.544 ms
 9 sales.upc-cablecom.ch ( 000.000.000.000 ) 14.141 ms 11.932 ms 16.012 ms

 

I have no idea where this is coming from and i am now forced for the most of my devices to go ahead and manually set my local LAN settings so that i know where the traffic is routed to.

 

I have some powerlines NICs that only connect a specific device to my network, but i don’t see how can that allow such a mix of networks that you mention. I will give it a shot though, just in case

Oh wow, i removed my powerline from the modem and the problem disappeared.

That is super weird, how did the power line NIC had such an effect? Are all the power connections throughout the building unified?

Login page on 192.168.1.1? Webinterface router? Can you upload a screenshot? 

Login page on 192.168.1.1? Webinterface router? Can you upload a screenshot? 

I have just removed the Powerline now and the problem is no longer reproducible.

It still beats me what kind of dark magic did the powerline use and made all the devices on my network acquire IPs from a completely different DHCP server.

Login page on 192.168.1.1? Webinterface router? Can you upload a screenshot? 

I have just removed the Powerline now and the problem is no longer reproducible.

It still beats me what kind of dark magic did the powerline use and made all the devices on my network acquire IPs from a completely different DHCP server.

 

That's why I hate those things! 😂 

Oh wow, i removed my powerline from the modem and the problem disappeared.

That is super weird, how did the power line NIC had such an effect? Are all the power connections throughout the building unified?

Sometimes, if your neighbours use the same devices they might connect to each other. We’ve seen this several times before.  I agree this should NOT happen. Apparently these devices are not so secure. And yes, powerline throughout a building are connected if they are on the same phase.