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

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# 1723 - Pentesting PPTP
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## 기본 정보
**Point-to-Point Tunneling Protocol (PPTP)**는 **모바일 장치**에 대한 **원격 액세스**를 위해 널리 사용되는 방법입니다. 이는 **TCP 포트 1723**을 사용하여 키를 교환하며, **IP 프로토콜 47**(Generic Routing Encapsulation, 또는 **GRE**)는 피어 간에 전송되는 데이터를 암호화하는 데 사용됩니다. 이 설정은 인터넷을 통한 안전한 통신 채널을 설정하는 데 중요하며, 교환되는 데이터가 기밀로 유지되고 무단 액세스로부터 보호되도록 보장합니다.
**기본 포트**:1723
## 열거
```bash
nmap Pn -sSV -p1723 <IP>
```
### [Brute Force](../generic-methodologies-and-resources/brute-force.md#pptp)
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## 취약점
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* [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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