hacktricks/network-services-pentesting/1723-pentesting-pptp.md

# 1723 - Pentesting PPTP

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## Basic Information

**Point-to-Point Tunneling Protocol (PPTP)** is a method widely employed for **remote access** to mobile devices. It utilizes **TCP port 1723** for the exchange of keys, while **IP protocol 47** (Generic Routing Encapsulation, or **GRE**), is used to encrypt the data that is transmitted between peers. This setup is crucial for establishing a secure communication channel over the internet, ensuring that the data exchanged remains confidential and protected from unauthorized access.

**Default Port**:1723

## Enumeration

```bash
nmap –Pn -sSV -p1723 <IP>
```

### [Brute Force](../generic-methodologies-and-resources/brute-force.md#pptp)

## Vulnerabilities
* [https://www.schneier.com/academic/pptp/](https://www.schneier.com/academic/pptp/)
* [https://github.com/moxie0/chapcrack](https://github.com/moxie0/chapcrack)

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