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Thread: FATAL: MITM attacks can't be used on unconfigured interfaces

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  1. #1
    Junior Member
    Join Date
    Jun 2010

    Default FATAL: MITM attacks can't be used on unconfigured interfaces

    Hello everyone. (problem using ettercap) I have been up for hours trying to figure this one out but I'm stuck. I cannot find any solutions on the web.
    This is what I did, and the results:

    root@bt:~# nano /etc/etter.conf
    (removed 2 # signs from iptables)

    root@bt:~# echo 1 > /proc/sys/net/ipv4/ip_forward

    root@bt:~# iptables -t nat -A PREROUTING -i wlan0 -p tcp --dport 80 -j REDIRECT --to-port 8080

    root@bt:~# nmap -sP
    (I am leaving out a long list of results here...)

    root@bt:~# ettercap -i wlan0 -TqM ARP:REMOTE / /

    ettercap NG-0.7.3 copyright 2001-2004 ALoR & NaGA

    Listening on wlan0... (Ethernet)

    wlan0 -> 00:C0:CA:4A:71:C6 invalid invalid

    Privileges dropped to UID 65534 GID 65534...

    28 plugins
    39 protocol dissectors
    53 ports monitored
    7587 mac vendor fingerprint
    1698 tcp OS fingerprint
    2183 known services

    Scanning for merged targets (2 hosts)...

    * |================================================= =>| 100.00 %

    0 hosts added to the hosts list...

    FATAL: MITM attacks can't be used on unconfigured interfaces


    Any ideas?
    Last edited by waterways; 05-15-2011 at 12:13 AM. Reason: should have put ettercap in subject. instead I put it in first line, so that a mouse scrollover will show it before clicking

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