# IKEv2 with 3rd party fails when Check Point initiate the tunnel

## Product
Site-to-Site VPN  
**Version**  
R80.40 (EOS), R81 (EOS), R81.10 (EOS), R81.20  
**OS**  
Gaia  
**Platform**  
All  
**Last Modified**  
2023-03-22

## Symptoms
- When initiating IKEv2 tunnel from Check point to 3rd party, creating Child SA fails.
- The _vpnd.elg_ file shows:

```
[vpnd PID ...]@Host[DATE TIME][ikev2] ikecrypt_decrypt: decrypted. padlen=4294967239, resulting bytes=488
[vpnd PID ...]@Host[DATE TIME][ikev2] decryptMessage: Result has 488 bytes <br>
[vpnd PID ...]@Host[DATE TIME][ikev2] Message::decodeAllPayloads: Not enough data in buffer for header of payload 1 (Nonce)
[vpnd PID ...]@Host[DATE TIME][ikev2] Message::Decode: Not all payloads were successfully decoded
[vpnd PID ...]@Host[DATE TIME][ikev2] Exchange::parseAndDecodeMessage: Failed to decode reply msg.
```

## Solution
This problem was fixed. The fix is included in:

- [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 8
- [Jumbo Hotfix Accumulator for R81.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.10/Default.htm) starting from Take 93
- [Jumbo Hotfix Accumulator for R81](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81/Default.htm) starting from Take 82
- [Jumbo Hotfix Accumulator for R80.40](https://sc1.checkpoint.com/documents/Jumbo_HFA/R80.40/Default.htm) starting from Take 196

If you choose not to upgrade, Check Point can supply a **Hotfix**. [Contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for this issue.

A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.

For faster resolution and verification, please collect [CPinfo files](http://supportcontent.checkpoint.com/solutions?id=sk92739) from the Security Management Server and Security Gateways involved in the case.

**Hotfix installation instructions:**

Refer to [sk168597 - How to install a Hotfix](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).

#### NOTE
This solution has been verified for the specific scenario, described by the combination of Product, Version and Symptoms. It may not work in other scenarios.

## Article Properties
**Access Level** General  
**Status** Approved by TAC  
**Date Created** 2022-11-16  
**Last Modified** 2023-03-22