Establish IPSEC VPN with fortigate by using RSA-Signed Certificate
Hi all, anyone has establish the IPSEC VPN with third party by using RSA-signed certificate before?Any guide or solutions can share to me ? Thanks establishing an IPsec VPN using an RSA-signed certificate with a FortiGate firewall involves a few steps. First, ensure you have a valid RSA-signed certificate for both the FortiGate and the third-party device. Next, configure the VPN settings on both ends, specifying the authentication method as certificate-based and selecting the RSA-signed certificate for authentication. Define the IPsec parameters such as encryption, authentication, and Phase 1/Phase 2 settings to match on both devices. Then, create the necessary firewall policies to allow VPN traffic between the sites. Finally, test the connection and troubleshoot any potential issues by checking logs and ensuring proper certificate installation. Please see below pre-requisites and configuration steps:
Pre-requisites
- Generate RSA Keys
- Obtain Certificates
Configuration steps:
1. install certificates
2. Configure IKE
3. Configure IPSec
4. Define IPSec policies
5. Set Pre-Shared Key (PSK) or Certificate Authentication
6. Define Tunnel Interfaces
7. Establish IKE Negotiations
8. Monitor and Troubleshoot Hi, according to this thread (https://community.sangfor.com/forum.php?mod=viewthread&tid=2812), you can establish an IPSEC VPN with a third-party device by using an RSA-signed certificate. However, you need to ensure that the VPN feature is available on your device and that you have the necessary licenses . Generate an RSA key pair (public and private key) for the VPN server. This is typically done on the device that will function as the VPN server. Create a CSR using the public key generated in the previous step. The CSR will be sent to a Certificate Authority (CA) for signing. The signed certificate will be used by the VPN server to prove its identity. Submit the CSR to a trusted Certificate Authority for signing. If you have an internal CA, you can use that, or you can obtain a certificate from a public CA. Once the CSR is signed, you will receive a certificate from the CA. This certificate will be associated with the private key generated in the first step. Install the signed certificate and configure the VPN server to use the private key and certificate for authentication. Also, configure the VPN settings, including the IPsec parameters such as Phase 1 and Phase 2 settings. Share the public key and certificate with the third party that will be connecting to your VPN. They may need to do a similar process on their end. Please note that configuring an IPsec VPN with Fortigate is similar to Sangfor VPN Configuration (https://community.sangfor.com/pl ... ewdatabase&tid=1004). If you are using an RSA-Signed Certificate, you need to navigate to Network > IPsec > Certificate > CSR to generate a CSR request file. Then, generate a certificate based on the CSR and import it to IPsec > Certificate > Certificate. Additionally, import the peer certificate to the Certificate section as well.
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