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Unknown connection to router - have MAC address.

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  • 08-12-2015 6:19pm
    #1
    Tinder Surprise
    Registered Users Posts: 1,462 ✭✭✭


    Hi,

    I noticed a device connected to my router momentarily, and I have accounted for all connected devices, and dont know what it is.

    Dec 8 05:21:15 dnsmasq-dhcp[251]: DHCPDISCOVER(br0) d4:4b:5e:77:86:66
    Dec 8 05:21:15 dnsmasq-dhcp[251]: DHCPOFFER(br0) 192.168.1.167 d4:4b:5e:77:86:66
    Dec 8 05:21:15 dnsmasq-dhcp[251]: DHCPREQUEST(br0) 192.168.1.167 d4:4b:5e:77:86:66
    Dec 8 05:21:15 dnsmasq-dhcp[251]: DHCPACK(br0) 192.168.1.167 d4:4b:5e:77:86:66

    and the times of the connections i weird.

    Anywhere to dig a bit deeper using the mac address details?


Comments

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    #2
    my3cents
    Closed Accounts Posts: 9,764 ✭✭✭my3cents


    Have you looked up the manufacturer of the device from the mac address?

    Try here http://www.macvendorlookup.com/ gives TAIYO YUDEN CO., LTD. then look for a device made by them or that has their equipment built into it.


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    #3
    degsie
    Registered Users Posts: 8,748 ✭✭✭degsie


    MACAddr Vendor
    D4-4B-5E-77-86-06 TAIYO YUDEN CO., LTD., JAPAN


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    #4
    ItHurtsWhenIP
    Registered Users Posts: 2,029 ✭✭✭ItHurtsWhenIP


    Is this a wireless router? Could somebody in range have attempted to connect?


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    #5
    ED E
    Registered Users Posts: 36,167 ✭✭✭✭ED E


    MMFITWGDV wrote: »
    Is this a wireless router? Could somebody in range have attempted to connect?

    DHCP would only happen AFTER auth, so that means they have a valid key already.
    Jeff LaMarche ‏@jeff_lamarche 8 Sep 2012
    @monadical Have a wireless Brother printer… might be that.
    6:22 PM - 8 Sep 2012 · Details
    0 retweets 0 likes

    Jeff LaMarche ‏@jeff_lamarche May 22 New Hartford, NY
    @yaltarent mystery solved. Better late than never. Thanks!
    12:27 PM - 22 May 2015 · Details
    0 retweets 0 likes
    More

    Wireless printer OP?


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    #6
    ItHurtsWhenIP
    Registered Users Posts: 2,029 ✭✭✭ItHurtsWhenIP


    ED E wrote: »
    DHCP would only happen AFTER auth, so that means they have a valid key already.
    ...

    Ah yes - good point. :o


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    #7
    my3cents
    Closed Accounts Posts: 9,764 ✭✭✭my3cents


    You could always just block that mac address and just wait to find out what stops working.


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    #8
    Tinder Surprise
    Registered Users Posts: 1,462 ✭✭✭Tinder Surprise


    thanks lads...will try as suggested.


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    #9
    emaherx
    Registered Users Posts: 6,139 ✭✭✭emaherx


    Fing is a useful app for your phone, it will show all devices connected to your network with ip addresses, Mac addresses, manufacturers, host names and even services running on the devices.


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    #10
    amikoalien2
    Closed Accounts Posts: 214 ✭✭amikoalien2


    You could also try
    netscan.exe
    https://www.softperfect.com/products/networkscanner/

    you can assign a friendly name like my ipad or my amiko alien2 :-)
    and it will remember the names when they connect making any non recognised devices stand out
    Chances are its just a phone or some thing like that that you have forgotten


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