Site-to-Site VPN from a Palo Alto Firewall in the AWS.

[nson2139]

Folks,

We have provisioned a Palo Alto Firewall in one of the AWS VPC. This is essentially a single legged deployment and the function of this firewall will only be to act as a transit firewall.

This firewall will have VPN connectivity to the corporate firewall and to some other remote VPC's. Traffic filtering will be done on this Palo Alto Firewall.

The issue we are facing is that we do not see any VPN getting negotiated from this Palo Alto Firewall to either the remote VPC or to the corporate firewall. The Palo Alto firewall has a RFC1918 IP address on it's Eth1/1 interface and then this IP address has been allocated a Elastic IP on the AWS console. At present we are going step-by-step and looking at the errors on the Phase-1 IKE connections.

Our corporate firewall which is a Juniper does get the Phase-1 messages from this Palo Alto firewall but throws out an error saying "Rejected an IKE packet on ethernetx/y from a.b.c.d:500 to e.f.g.h:500 with cookies ********* and 00000000 because an initial Phase 1 packet arrived from an unrecognized peer gateway.

a.b.c.d is the Elastic IP provided in AWS

e.f.g.h is the Public interface IP of the Juniper firewall.

Could someone throw some light on what could be the issue? Is there some way to work on this?

Thanks!!!

[nson2139]

Thanks for the comments Rashid, all the mentioned are already enabled.

This still does not work. At this point we are kind of unable to understand the issue.