Tool Documentation:

responder Usage Example

Specify the IP address to redirect to (-i, enabling the WPAD rogue proxy (-w On), answers for netbios wredir (-r On), and fingerprinting (-f On):

root@kali:~# responder -i -w On -r On -f On
NBT Name Service/LLMNR Responder 2.0.
Please send bugs/comments to: [email protected]
To kill this script hit CRTL-C

[+]NBT-NS & LLMNR responder started
[+]Loading Responder.conf File..
Global Parameters set:
Responder is bound to this interface:ALL
Challenge set is:1122334455667788
WPAD Proxy Server is:ON
WPAD script loaded:function FindProxyForURL(url, host){if ((host == "localhost") || shExpMatch(host, "localhost.*") ||(host == "") || isPlainHostName(host)) return "DIRECT"; if (dnsDomainIs(host, "RespProxySrv")||shExpMatch(host, "(*.RespProxySrv|RespProxySrv)")) return "DIRECT"; return 'PROXY ISAProxySrv:3141; DIRECT';}
HTTP Server is:ON
HTTPS Server is:ON
SMB Server is:ON
SMB LM support is set to:OFF
SQL Server is:ON
FTP Server is:ON
IMAP Server is:ON
POP3 Server is:ON
SMTP Server is:ON
DNS Server is:ON
LDAP Server is:ON
FingerPrint Module is:ON
Serving Executable via HTTP&WPAD is:OFF
Always Serving a Specific File via HTTP&WPAD is:OFF

Packages and Binaries:


This package contains Responder/MultiRelay, an LLMNR, NBT-NS and MDNS poisoner. It will answer to specific NBT-NS (NetBIOS Name Service) queries based on their name suffix (see: By default, the tool will only answer to File Server Service request, which is for SMB.

The concept behind this is to target your answers, and be stealthier on the network. This also helps to ensure that you don’t break legitimate NBT-NS behavior. You can set the -r option via command line if you want to answer to the Workstation Service request name suffix.

Installed size: 4.06 MB
How to install: sudo apt install responder

  • net-tools
  • python3
  • python3-netifaces
  • python3-pkg-resources
  • python3-pycryptodome
  • python3-six
root@kali:~# responder -h
  .----.-----.-----.-----.-----.-----.--|  |.-----.----.
  |   _|  -__|__ --|  _  |  _  |     |  _  ||  -__|   _|
  |__| |_____|_____|   __|_____|__|__|_____||_____|__|

           NBT-NS, LLMNR & MDNS Responder

  To support this project:
  Github ->
  Paypal  ->

  Author: Laurent Gaffie ([email protected])
  To kill this script hit CTRL-C

Usage: responder -I eth0 -w -d
responder -I eth0 -wd

  --version             show program's version number and exit
  -h, --help            show this help message and exit
  -A, --analyze         Analyze mode. This option allows you to see NBT-NS,
                        BROWSER, LLMNR requests without responding.
  -I eth0, --interface=eth0
                        Network interface to use, you can use 'ALL' as a
                        wildcard for all interfaces
  -i, --ip=
                        Local IP to use (only for OSX)
  -6 2002:c0a8:f7:1:3ba8:aceb:b1a9:81ed, --externalip6=2002:c0a8:f7:1:3ba8:aceb:b1a9:81ed
                        Poison all requests with another IPv6 address than
                        Responder's one.
  -e, --externalip=
                        Poison all requests with another IP address than
                        Responder's one.
  -b, --basic           Return a Basic HTTP authentication. Default: NTLM
  -d, --DHCP            Enable answers for DHCP broadcast requests. This
                        option will inject a WPAD server in the DHCP response.
                        Default: False
  -D, --DHCP-DNS        This option will inject a DNS server in the DHCP
                        response, otherwise a WPAD server will be added.
                        Default: False
  -w, --wpad            Start the WPAD rogue proxy server. Default value is
  -u UPSTREAM_PROXY, --upstream-proxy=UPSTREAM_PROXY
                        Upstream HTTP proxy used by the rogue WPAD Proxy for
                        outgoing requests (format: host:port)
  -F, --ForceWpadAuth   Force NTLM/Basic authentication on wpad.dat file
                        retrieval. This may cause a login prompt. Default:
  -P, --ProxyAuth       Force NTLM (transparently)/Basic (prompt)
                        authentication for the proxy. WPAD doesn't need to be
                        ON. This option is highly effective. Default: False
  -Q, --quiet           Tell Responder to be quiet, disables a bunch of
                        printing from the poisoners. Default: False
  --lm                  Force LM hashing downgrade for Windows XP/2003 and
                        earlier. Default: False
  --disable-ess         Force ESS downgrade. Default: False
  -v, --verbose         Increase verbosity.




root@kali:~# responder-Icmp-Redirect -h
Usage: responder-Icmp-Redirect -I eth0 -i -g -t -r

  -h, --help            show this help message and exit
  -i, --ip=
                        The ip address to redirect the traffic to. (usually
  -g, --gateway=
                        The ip address of the original gateway (issue the
                        command 'route -n' to know where is the gateway
  -t, --target=
                        The ip address of the target
  -r, --route=
                        The ip address of the destination target, example: DNS
                        server. Must be on another subnet.
  -s, --secondaryroute=
                        The ip address of the destination target, example:
                        Secondary DNS server. Must be on another subnet.
  -I eth0, --interface=eth0
                        Interface name to use, example: eth0
  -a, --alternate=
                        The alternate gateway, set this option if you wish to
                        redirect the victim traffic to another host than yours

root@kali:~# responder-MultiRelay -h
[!]MultiRelay/bin/ folder is empty. You need to run these commands:

apt-get install gcc-mingw-w64-x86-64
x86_64-w64-mingw32-gcc ./MultiRelay/bin/Runas.c -o ./MultiRelay/bin/Runas.exe -municode -lwtsapi32 -luserenv
x86_64-w64-mingw32-gcc ./MultiRelay/bin/Syssvc.c -o ./MultiRelay/bin/Syssvc.exe -municode

Additionally, you can add your custom mimikatz executables (mimikatz.exe and mimikatz_x86.exe)
in the MultiRelay/bin/ folder for the mimi32/mimi command.

root@kali:~# responder-RunFinger -h
Usage: responder-RunFinger -i
responder-RunFinger -i

  --version             show program's version number and exit
  -h, --help            show this help message and exit
  -i, --ip=
                        Target IP address or class C
  -f ips.txt, --filename=ips.txt
                        Target file
  -t 0.9, --timeout=0.9
                        Timeout for all connections. Use this option to fine
                        tune Runfinger.

Updated on: 2024-Mar-11