# 512 - Pentesting Rexec
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## Basic Information
It is a service that **allows you to execute a command inside a host** if you know valid **credentials** (username and password).
**Default Port:** 512
```
PORT STATE SERVICE
512/tcp open exec
```
### [**Brute-force**](../generic-methodologies-and-resources/brute-force.md#rexec)
**Get a hacker's perspective on your web apps, network, and cloud**
**Find and report critical, exploitable vulnerabilities with real business impact.** Use our 20+ custom tools to map the attack surface, find security issues that let you escalate privileges, and use automated exploits to collect essential evidence, turning your hard work into persuasive reports.
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