Proxy IDs help

[Neo.The.One]

Hello

I have a Palo Alto Firewall which wants to have IPsec Tunnel with a peer firewall which is a Checkpoint Firewall. Any of the firewalls can initiate VPN Traffic.

Can someone kindly let me know, what proxy IDs can be set on my Palo alto firewall for the following 2 cases.

Case 1:

My internal networks for VPN (Palo Alto Firewall) : 172.16.10.0/24 , 10.31.0.0/16, 10.40.40.0/24

Networks behind the peer (Checkpoint Firewall) : Unknown

Case 2

My internal networks for VPN (Palo Alto Firewall) : 172.16.10.0/24 , 10.31.0.0/16, 10.40.40.0/24

Networks behind the peer (Checkpoint Firewall) : Exactly same i.e. 172.16.10.0/24 , 10.31.0.0/16, 10.40.40.0/24

Thanks a lot !!

[HULK]

Hello Amit,

PROXY ID's are required to define the SPI key's in the IPSec VPN. SPI is a key pair, used for encapsulation and decapsulation of ESP packet.

CASE-1: Proxy ID's should be as mentioned below:

CASE-2: You have to follow the DOC : Configuring route based IPSec with overlapping networks

Reference Info:Re: IPsec VPN Tunnel with overlapping subnets.

Hope this helps.

Thanks

[Neo.The.One]

Thanks for your reply! A few more questions:

1. Do I always have to mention 0.0.0.0/0 as remote proxy id or can i leave it blank?

2. Do I also have to add the IP Addresses of External Interfaces of Palo Alto and Peer Firewalls, in the Proxy IDs List ?

Thanks!!

[Satish · Accepted solution]

Hi Amit,

Ans 1:- you cant do this.

2;-  yes

Regards

Satish

[Satish]

Hi Amit,

It may be help  you in configuration.....

How to Configure IPSec VPN

Thnx

Satish

[Neo.The.One]

Hi Satish,

thanks for your reply! Everything works now!!

[Bocsa]

Hi Satish,

I'm having a problem with Proxy-ID mismatch. This is between a PAN Firewall and a Cisco 3G router. For my local Proxy ID on the PAN, I have configured 10.5.0.0/16. However, when I look at the logs, it says 'received local id is X.X.X.X' 

where X.X.X.X is the public interface of the PAN. I can't figure out why.

Also, is a NAT-exempt rule required for my Local Proxy-ID?

[pulukas]

'received local id is X.X.X.X' 

I believe this is telling you that the Cisco is sending the proxy-id with your public ip address.  You will need to check the configuration on that side to remove this setting and put in the ACL on the Cisco tunnel that you need.