topic How to configure ipsec vpn in General Topics

How to configure ipsec vpn

Chignon — Thu, 28 Sep 2023 04:43:31 GMT

How to configure ipsec vpn between palo atto and fortigate firewall .

VPN flow is following

Remote Lan (191.168.1.0/24) >>>> Fortigate (192.168.10.2 private ip)>>>>>Cisco router(203.1.1.2/29)>>>>>PaloAlto(202.1.1.10/30-public ip)----Local lan

fortigate firewall is the behind the NATed device that is cisco router and Cisco Router have public ip (203.1.1.2/29) but Fortigate do not have public ip address and they have private ip(191.168.10.2).NATed device is in front of fortigate.

How can we configure for that?

Re: How to configure ipsec vpn

Raido_Rattameister — Thu, 28 Sep 2023 13:24:56 GMT

Palo side

If Cisco router don't have DNAT rule to forward packets arriving to 203.1.1.2 further towards 192.168.10.2 then it makes sense to make Palo to be passive.

"Enable NAT Traversal" will encapsulate IPSec packets into UDP packet. This is needed if NAT is involved.

Re: How to configure ipsec vpn

OtakarKlier — Thu, 28 Sep 2023 16:09:47 GMT

Hello,

check out @Raido_Rattameister reply. The natted firewall/vpn endpoint needs to have the IP listed as the "Peer Identification" IP address. So point your tunnel at the public IP and the Peer Identification as the VPN endpoint device.

Regards,