topic Re: Source IP for SSL Forward Proxy in Virtual Wire Mode in General Topics

Source IP for SSL Forward Proxy in Virtual Wire Mode

Karim_Sabry — Sun, 08 Apr 2018 16:38:32 GMT

Can someone tell me how to know/what would be the Source IP address for an SSL Tunnel Proxied from the PAN NGFW while running in Virtual Wire Mode ?

My topology is very simple:

User (Virtual Wire) ----> PAN ----> Internet

Does the Firewall initiate the Proxied SSL Tunnel using the management interface IP address with the Untrust Zone ?

Re: Source IP for SSL Forward Proxy in Virtual Wire Mode

Remo — Sun, 08 Apr 2018 17:40:19 GMT

Hi @Karim_Sabry

The firewall will use the IP address that you have configured in your NAT policy. If you don't have a NAT policy the source IP will be the actual source IP of the client, but this configuration won't work unless you have public IPs in your client network.

An example for NAT with VWire you can find here:

https://www.paloaltonetworks.com/documentation/80/pan-os/pan-os/networking/nat/nat-configuration-examples/virtual-wire-source-nat-example

Re: Source IP for SSL Forward Proxy in Virtual Wire Mode

reaper — Mon, 09 Apr 2018 07:45:06 GMT

on top of how NAT works in a vwire, it is important to note (since you don't mention ssl decryption) your ssl tunnel will not be proxied unless you have ssl decryption enabled, in which case the soure IP will remain the client/NAT ip, the firewall will 'spoof' the appropriate mac and IP while performing decryption.

If ssl is not being decrypted the packets will be passed along and NAT will be applied in-stream (if at all configured)