{% hint style="success" %}
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{% endhint %}

### DHCPv6 vs. DHCPv4 Message Types Comparison
A comparative view of DHCPv6 and DHCPv4 message types is presented in the table below:

| DHCPv6 Message Type | DHCPv4 Message Type |
|:-------------------|:-------------------|
| Solicit (1) | DHCPDISCOVER |
| Advertise (2) | DHCPOFFER |
| Request (3), Renew (5), Rebind (6) | DHCPREQUEST |
| Reply (7) | DHCPACK / DHCPNAK |
| Release (8) | DHCPRELEASE |
| Information-Request (11) | DHCPINFORM |
| Decline (9) | DHCPDECLINE |
| Confirm (4) | none |
| Reconfigure (10) | DHCPFORCERENEW |
| Relay-Forw (12), Relay-Reply (13) | none |

**Detailed Explanation of DHCPv6 Message Types:**

1. **Solicit (1)**: Initiated by a DHCPv6 client to find available servers.
2. **Advertise (2)**: Sent by servers in response to a Solicit, indicating availability for DHCP service.
3. **Request (3)**: Clients use this to request IP addresses or prefixes from a specific server.
4. **Confirm (4)**: Used by a client to verify if the assigned addresses are still valid on the network, typically after a network change.
5. **Renew (5)**: Clients send this to the original server to extend address lifetimes or update configurations.
6. **Rebind (6)**: Sent to any server to extend address lifetimes or update configurations, especially when no response is received to a Renew.
7. **Reply (7)**: Servers use this to provide addresses, configuration parameters, or to acknowledge messages like Release or Decline.
8. **Release (8)**: Clients inform the server to stop using one or more assigned addresses.
9. **Decline (9)**: Sent by clients to report that assigned addresses are in conflict on the network.
10. **Reconfigure (10)**: Servers prompt clients to initiate transactions for new or updated configurations.
11. **Information-Request (11)**: Clients request configuration parameters without IP address assignment.
12. **Relay-Forw (12)**: Relay agents forward messages to servers.
13. **Relay-Repl (13)**: Servers reply to relay agents, who then deliver the message to the client.

## References
* [https://support.huawei.com/enterprise/en/doc/EDOC1100306163/d427e938/introduction-to-dhcpv6-messages](https://support.huawei.com/enterprise/en/doc/EDOC1100306163/d427e938/introduction-to-dhcpv6-messages)


{% hint style="success" %}
Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)

<details>

<summary>Support HackTricks</summary>

* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.

</details>
{% endhint %}