> Source: [sk181470](https://support.checkpoint.com/results/sk/sk181470)

# sk181470 - VPN connection with certificate-based IKEv2 authentication fails when peers use different certificate encoding and/or hashing algorithm

| Property | Value |
|----------|-------|
| Solution ID | sk181470 |
| Date Created | 2023-10-17 |
| Last Modified | 2026-09-02 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- * Peers cannot establish an IKEv2 tunnel when they use certificates with different encoding/hashing algorithms. For example, one peer is a Check Point Security Gateway using an RSA-based certificate, while its peer uses an ECDSA-based certificate.
* The Check Point Security Gateway can crash during the VPN negotiation, when it is a responder. On the other hand, when the Check Point Security Gateway is the initiator of the VPN negotiation, the VPN connection is successful.

## Solution

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