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While using this command

aireplay-ng --deauth 1000 -a <router mac address> -c <user mac address> interface name

After hitting enter and sending two deauths, it says

write failed:Network is down
Wi_write() :Network is down

enter image description here

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1 Answer 1

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At the [1| 0 ACKs] you can see that both the router and client have a weak signal. Aireplay is sending 64 deauth packages for each the client and router. Only 1/64 deauth packages arrived at the router and 0/64 packages at the client, meaning you are out of range.

Now to the main part of your question.

write failed:Network is down
Wi_write() :Network is down

The error message indicates that there is a problem with your wireless interface. Run lspci -k to find out which exact WiFi chip is used and search the internet whether it supports monitor mode. Also try reinstalling the proper drivers with the chipset information gathered by the previously mentioned command and the Debian Wiki - WiFi.

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  • The clip I have is realtek rtl8192eu
    – Riyan
    Jun 6, 2023 at 19:03
  • And I am testing on my own router in my home than how its possible that I am out of range...
    – Riyan
    Jun 6, 2023 at 19:05
  • @Riyan Well either your Interface just has a worse range for some reason when being in monitor mode. Or your router encrypts management frames, preventing deauth attacks. Jun 6, 2023 at 20:39
  • Look at the Pwr value in airodump-ng, the closer its to 0, the better the range is Jun 6, 2023 at 20:40
  • I analyzed my issue and came to know that I haven't installed my driver into kali linux so I will install the driver and than let you know if I faced any problem.
    – Riyan
    Jun 7, 2023 at 6:44

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