BOVPN on a Firebox Behind a Device That Does NAT
MikroTik IPSec Tunnel with DDNS and NAT - Occursus Arca May 29, 2016 How to configure IPSec Site to Site VPN while one Site is Sep 19, 2017 NAT a single IP address through Site to Site VPN Apr 02, 2018 Dynamic Multipoint VPN Configuration Guide, Cisco IOS XE
Configuring IPSec Router-to-Router with NAT Overload and
Mar 12, 2014 May 03, 2017 · You’ll see I’ve moved the B-End IP of the IPSec tunnel to the ADSL router so the A-End config doesn’t change. All I need to do is renumber the blue linknet to my chosen RFC1918 subnet of 192.168.1.0/24 and give my ASA a new default route matching the ADSL routers interface and all is well. As long as you can NAT the required protocol and ports (see below) on the routers, you can use any VPN solution that support NAT-Traversal (NAT-T) to establish an IPSEC tunnel (as commented by Zac67) pfSense does support NAT-T, so you're good to go. Devices that do NAT usually have some basic firewall features. To make a VPN tunnel to your Firebox when the Firebox is installed behind a device that does NAT, the NAT device must let the traffic through. These ports and protocols must be open on the NAT device: UDP port 500 (IKE) UDP port 4500 (NAT Traversal) NAT Traversal (NAT-T)
SRX Series,vSRX. Understanding NAT-T, Example: Configuring a Route-Based VPN with Only the Responder Behind a NAT Device, Example: Configuring a Policy-Based VPN with Both an Initiator and a Responder Behind a NAT Device, Example: Configuring NAT-T with Dynamic Endpoint VPN
As long as you can NAT the required protocol and ports (see below) on the routers, you can use any VPN solution that support NAT-Traversal (NAT-T) to establish an IPSEC tunnel (as commented by Zac67). pfSense does support NAT-T, so you're good to go. BOVPN on a Firebox Behind a Device That Does NAT Devices that do NAT usually have some basic firewall features. To make a VPN tunnel to your Firebox when the Firebox is installed behind a device that does NAT, the NAT device must let the traffic through. These ports and protocols must be open on the NAT device: UDP port 500 (IKE) UDP port 4500 (NAT Traversal) NAT Traversal (NAT-T) How to set up a VPN behind an existing firewall | SonicWall To set up the VPN behind an existing firewall, you can use site to site VPN with aggressive mode and it's not necessary to do any NAT tranversal. In this case, for site SAN, you can configure the site as below. For site LOS, you can configure the site as following picture. Once the configurations are done, the VPN Tunnel will be up on both sides. Connecting L2TP/ IPSec VPN Server Behind a NAT, Error Code May 14, 2018