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44 lines
1.1 KiB
Markdown
44 lines
1.1 KiB
Markdown
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# 23 - Pentesting Telnet
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## **Basic Information**
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Telnet is a network protocol that gives users a UNsecure way to access a computer over a network.
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**Default port:** 23
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```text
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23/tcp open telnet
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```
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## **Enumeration**
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### **Banner Grabbing**
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```bash
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nc -vn <IP> 23
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```
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All the interesting enumeration can be performed by **nmap**:
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```bash
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nmap -n -sV -Pn --script "*telnet* and safe" -p 23 <IP>
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```
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The script `telnet-ntlm-info.nse` will obtain NTLM info \(Windows versions\).
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In the TELNET Protocol are various "**options**" that will be sanctioned and may be used with the "**DO, DON'T, WILL, WON'T**" structure to allow a user and server to agree to use a more elaborate \(or perhaps just different\) set of conventions for their TELNET connection. Such options could include changing the character set, the echo mode, etc. \(From the [telnet RFC](https://tools.ietf.org/html/rfc854)\)
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**I know it is possible to enumerate this options but I don't know how, so let me know if know how.**
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### \*\*\*\*[Brute force](../brute-force.md#telnet)
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## Config file
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```bash
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/etc/inetd.conf
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/etc/xinetd.d/telnet
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/etc/xinetd.d/stelnet
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```
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