> For the complete documentation index, see [llms.txt](https://blog.hacktive.bebzounette.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://blog.hacktive.bebzounette.com/services/echo-7.md).

# Echo - 7

## 1. **Infos** :

Le service echo a été proposé à l'origine pour tester et mesurer les temps aller-retour dans les réseaux IP.

Un hôte peut se connecter à un serveur qui supporte le protocole Echo et le serveur lui renverra une copie identique des données qu'il a reçues.

Port par défaut : 7/tcp/udp

```
PORT   STATE SERVICE
7/udp  open  echo
7/tcp  open  echo
```

## **2. Connection au service Echo (UDP)**

```
nc -uvn <IP> 7
Hello echo #Ce que vous envoyez
Hello echo #Réponse renvoyée par le serveur
```

## **3. Shodan**

```
port:7 echo
```


---

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