> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/fr/active-directory/kerberos/kerberos-observation-with-wireshark.md).
# Observer Kerberos avec Wireshark
### Observation d'une authentification
Nous ouvrons Wireshark, puis nous nous connectons avec un utilisateur, par exemple :
```
user1
```
Dans Wireshark, vous pouvez filtrer le trafic Kerberos avec :
```
kerberos
```
Nous observons ensuite les échanges :
```bash
AS-REQ
AS-REP
TGS-REQ
TGS-REP
```
### Exemple d'accès à un partage sans permissions
Depuis `user2`, nous essayons d'accéder à un partage administratif :
```
cd //WS01/C$
```
Dans Wireshark, nous pouvons observer :
```
TGS-REQ
TGS-REP
Accès SMB refusé
```
Cela signifie que :
1. l'utilisateur demande un ticket de service ;
2. le KDC délivre le ticket ;
3. le ticket est présenté au serveur ;
4. le serveur refuse l'accès en raison des autorisations SMB ou NTFS.
### Ticket et authentificateur
Lors de l'accès à un service, le client envoie généralement :
* un ticket de service ;
* un authentificateur.
Le ticket prouve que le KDC a autorisé l'accès au service.
L'authentificateur prouve que le client est bien celui qui utilise le ticket.
---
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