> For the complete documentation index, see [llms.txt](https://wiki.pentestlist.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.pentestlist.com/offensive-security/internal-infrastructure/credential-discovery/passwords-and-netntlm.md). # Passwords and NetNTLM ## Responder * Responder is a spoofing tool that can ultimately lead to gaining hashed or even cleartext passwords. It works by acting as an authentication server and responds to various network protocols asking for a authentication credentials. Responder supports the following protocols for both IPV4 and IPV6: * SMB * MSSQL * HTTP * HTTPS * LDAP * DCE-RPC * FTP, POP3, IMAP, SMTP * DNS server. * WPAD Proxy Server. Responder is great for running on internal networks to capture credentials. The following command will run responder in verbose mode on the "eth0" interface and also force NTLM and Basic authentication (weak forms of authentication), where possible. `./Responder.py -I eth0 -Pv` When there is a requirement to be more stealthy, Responder can be executed in analyse mode which allows the viewing of requests, but will not spoof them: `responder -I eth0 --analyze` --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://wiki.pentestlist.com/offensive-security/internal-infrastructure/credential-discovery/passwords-and-netntlm.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.