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Buff_r

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Posts posted by Buff_r

  1. There are devices out there that will help determine pinouts for JTAG/Serial/UART.

    But with a little searching I found this. It helps to remember I found my pinouts on openwrt site a few years back.

    https://wiki.openwrt.org/toh/netcomm/nb6plus4w

    May not be the exact model, but should get you in the right direction.

    What is the FCC ID of the device?

    When the device is powered, you should be able to test for voltage and ground on those pins with a multimeter. The other two would be TX and RX. You only need to connect TX, RX, and GND to your TTL adapter and power the device with the wall wart as normal operation. If you can't communicate with standard bauds (maybe the ones from the link above), then swap the cables on the pins you believe to be TX and RX. Try again.

    If smoke comes out of anything, you did something wrong :P

    yep i tried it today and it was the wrong pinout the ttl adapter went hot but i found a device to find the correct pinout for UART + JTAG on hackaday its called the "jtagulator" its a pretty sick device it also has over-current protection i believe. anyway thanks for your help and this does not have an fcc id for some odd reason.

  2. You can forbid your device from replying to ping, Also change your mac address to a device that is already connected so if they choose to filter mac addresses one of the device they use will be hit offline, check what ports are open.

    You can do this with the command:

    netstat -atun

    Make sure your device doesn't have any suspicious port open such as port: 1337 (Never use this port it's obvious)

    Don't give your device weird names.

    Evade network scanners by setting your IP out of its range. eg: If a network scanner has a range of 192.168.0.255 then set your ip to 192.168.9.10.

    A Nice scheme is to make your device look like a printer or fax just download the whole webpage from the real printer (If it supports HTTP or HTTPS) (You can also use iframes)

    Then direct all the requests to the real printer in case they test print. (Sometimes you can hide things in plain sight) (Make sure the real printer is always online if its not and your fake page is still up then most likely your cover has been broken.)

    Use programming skills if you have any at hand.

    Some of these won't be convincing together such as a printer out of the IP range, 2 of the same printers on the same network.

    Choose carefully.

  3. i was wondering if these are possible serial headers. I'm trying to hopefully get a shell from this.


    and how would i communicate with these do i use any TTL adapter are does it have to be specific.


    also what it an easy way to identify the headers TX,RX,VCC,GND...?



    I'm a beginner so please give me some tips.


    Images:


    1snvrr.jpg


    2lo3bj6.jpg


    Device: NetComm NB6Plus4Wn


    I'm a beginner at this so please give me some tips too. :)


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