> For the complete documentation index, see [llms.txt](https://red.infiltr8.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://red.infiltr8.io/ad/recon/tools/responder.md).

# Responder ⚙️

[Responder](https://github.com/lgandx/Responder) (Python) is a great tool for [LLMNR, NBTNS, MDNS poisoning](/ad/movement/mitm-and-coerced-authentications/llmnr-nbtns-mdns-spoofing.md) and [WPAD spoofing](/ad/movement/mitm-and-coerced-authentications/wpad-spoofing.md) but it can also be used in "analyze" modes.

* **BROWSER mode**: inspect [Browse Service](http://ubiqx.org/cifs/Browsing.html) messages and map IP addresses with NetBIOS names
* **LANMAN mode**: passively map domain controllers, servers and workstations joined to a domain with the Browser protocol (see [this](https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/responder-20-owning-windows-networks-part-3/)).
* **LLMNR, NBTNS, MDNS modes**: inspect broadcast and multicast name resolution requests

The following command will enable the analyze modes and will give interesting information like

* Domain Controller, SQL servers, workstations
* Fully Qualified Domain Name (FQDN)
* Windows versions in used
* The "enabled" or "disabled" state of protocols like LLMNR, NBTNS, MDNS, LANMAN, BROWSER

```bash
responder --interface "eth0" --analyze
responder -I "eth0" -A
```

{% embed url="<https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/responder-20-owning-windows-networks-part-3/>" %}


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