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# Basiese Inligting
'n Echo-diens word op hierdie gasheer uitgevoer. Die echo-diens was bedoel vir toets- en meetdoeleindes en kan op beide TCP- en UDP-protokolle luister. Die bediener stuur enige data wat dit ontvang terug, sonder enige wysiging.\
**Dit is moontlik om 'n denial of service te veroorsaak deur die aanskakeling van 'n echo-diens aan die echo-diens op dieselfde of 'n ander masjien**. As gevolg van die oormatig hoë aantal pakkies wat geproduseer word, kan die geaffekteerde masjiene effektief buite werking gestel word.\
Inligting vanaf [https://www.acunetix.com/vulnerabilities/web/echo-service-running/](https://www.acunetix.com/vulnerabilities/web/echo-service-running/)
**Verstekpoort:** 7/tcp/udp
```
PORT STATE SERVICE
7/udp open echo
7/tcp open echo
```
## Kontak Echo-diens (UDP)
To contact an Echo service using UDP, you can use the `nc` command with the `-u` flag followed by the IP address and port number of the target. For example:
```bash
nc -u
```
The Echo service will simply send back any data it receives, allowing you to test the connectivity and response of the target system.
```bash
nc -uvn 7
Hello echo #This is wat you send
Hello echo #This is the response
```
## Shodan
* `port:7 echo`
## Verwysings
[Wikipedia echo](http://en.wikipedia.org/wiki/ECHO\_protocol)
[CA-1996-01 UDP Port Denial-of-Service Attack](http://www.cert.org/advisories/CA-1996-01.html)
Leer AWS-hacking van nul tot held met htARTE (HackTricks AWS Red Team Expert)!
Ander maniere om HackTricks te ondersteun:
* As jy jou **maatskappy geadverteer wil sien in HackTricks** of **HackTricks in PDF wil aflaai**, kyk na die [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
* Kry die [**amptelike PEASS & HackTricks swag**](https://peass.creator-spring.com)
* Ontdek [**The PEASS Family**](https://opensea.io/collection/the-peass-family), ons versameling eksklusiewe [**NFTs**](https://opensea.io/collection/the-peass-family)
* **Sluit aan by die** 💬 [**Discord-groep**](https://discord.gg/hRep4RUj7f) of die [**telegram-groep**](https://t.me/peass) of **volg** ons op **Twitter** 🐦 [**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
* **Deel jou hacktruuks deur PR's in te dien by die** [**HackTricks**](https://github.com/carlospolop/hacktricks) en [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github-repos.