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Internet, Networking, and Wireless
Curiosity About 2 Routers In IP Scanner Results
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<blockquote data-quote="michelangelo" data-source="post: 1780137" data-attributes="member: 54225"><p>OK PGB1. You tried earlier, If I read well, to change the wifi password (with correct encryption I assume), the 192.168.1.252 device (I will call it "Alien") immediately re-connected. That alone would mean this Alien was informed of your new password. Two people were informed: you and your 192.168.1.1 router. Assuming you are not a spy for Alien, then Alien got its information from your 192.168.1.1 router. </p><p></p><p>You tried reducing the range of distributable IP addresses (distributable by DHCP). Given your LAN and its subnet mask (which I presume is the standard 255.255.255.0, please confirm), the complete actress range 192.168.1.1 to 192.168.1.256 is in the subnet, even if the router only distributes a smaller portion with DHCP, the other addresses can still get recognised by the router if (1) they know how to access the router (by providing the password if wifi or directly if connected by wire); and (2) they are alone claiming this IP. So it is logical that Alien remained connected even if the DHCP range stopped before its number. Strange, however, is the fact the router refused to let Alien outside its DHCP range. I still believe your router and Alien are close friends, and Alien is physically inside your LAN (inside your house and wire-connected), not at a far-away location. </p><p></p><p>The sole conclusion I can draw of the above is Alien is in the box of your router. Your ISP knows it, knows what it does, knows what it does for them, and possibly even for you. But it is quite possible that they will not tell you. </p><p></p><p>In my home, confronted to quasi-equivalent vexing problems of services accessing my router from the outside by open ports (as discoverable by GRC's "Shields-up" test) and realising that these services were useful to my ISP to conduct a variety of tests on my modem-router and to upgrade its firmware without telling me, I resorted to buying a modem-router and returning its box (a modem-router-firewall) to my ISP. The drawback of this is of course I must look for firmware updates myself and cannot rely on my ISP's testing my modem (which they were never able to do anyway). </p><p></p><p>Knowledge being often useful, you may want to try shields up <<a href="https://www.grc.com/x/ne.dll?bh0bkyd2" target="_blank">https://www.grc.com/x/ne.dll?bh0bkyd2</a>>. But shields up will not tell you what Alien does. Being inside your Lan, Alien is capable of issuing request to anyone outside your LAN and receive requests to its queries, without any need to leave ports open in your firewall, and then discoverable by Shields up from the outside. </p><p></p><p>I assume Alien was installed by your ISP, hence would only query your ISP for useful stuff, like updating your modem-router firmware... But that is only an assumption. HTH</p></blockquote><p></p>
[QUOTE="michelangelo, post: 1780137, member: 54225"] OK PGB1. You tried earlier, If I read well, to change the wifi password (with correct encryption I assume), the 192.168.1.252 device (I will call it "Alien") immediately re-connected. That alone would mean this Alien was informed of your new password. Two people were informed: you and your 192.168.1.1 router. Assuming you are not a spy for Alien, then Alien got its information from your 192.168.1.1 router. You tried reducing the range of distributable IP addresses (distributable by DHCP). Given your LAN and its subnet mask (which I presume is the standard 255.255.255.0, please confirm), the complete actress range 192.168.1.1 to 192.168.1.256 is in the subnet, even if the router only distributes a smaller portion with DHCP, the other addresses can still get recognised by the router if (1) they know how to access the router (by providing the password if wifi or directly if connected by wire); and (2) they are alone claiming this IP. So it is logical that Alien remained connected even if the DHCP range stopped before its number. Strange, however, is the fact the router refused to let Alien outside its DHCP range. I still believe your router and Alien are close friends, and Alien is physically inside your LAN (inside your house and wire-connected), not at a far-away location. The sole conclusion I can draw of the above is Alien is in the box of your router. Your ISP knows it, knows what it does, knows what it does for them, and possibly even for you. But it is quite possible that they will not tell you. In my home, confronted to quasi-equivalent vexing problems of services accessing my router from the outside by open ports (as discoverable by GRC's "Shields-up" test) and realising that these services were useful to my ISP to conduct a variety of tests on my modem-router and to upgrade its firmware without telling me, I resorted to buying a modem-router and returning its box (a modem-router-firewall) to my ISP. The drawback of this is of course I must look for firmware updates myself and cannot rely on my ISP's testing my modem (which they were never able to do anyway). Knowledge being often useful, you may want to try shields up <[URL="https://www.grc.com/x/ne.dll?bh0bkyd2"]https://www.grc.com/x/ne.dll?bh0bkyd2[/URL]>. But shields up will not tell you what Alien does. Being inside your Lan, Alien is capable of issuing request to anyone outside your LAN and receive requests to its queries, without any need to leave ports open in your firewall, and then discoverable by Shields up from the outside. I assume Alien was installed by your ISP, hence would only query your ISP for useful stuff, like updating your modem-router firmware... But that is only an assumption. HTH [/QUOTE]
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