I believe I have figured it out.  Issue was in my netmap entries.  Was using 
wrong interface(lan instead of wan and not specifying net3).
Sent from my iPhone

> On Apr 14, 2025, at 12:55 PM, Rich Goodwin <rgood...@rentall-inc.com> wrote:
> 
> HELP! -- I just can't seem to figure out how to configure this.
> I have a Shorewall/IPSEC VPN gateway configuration that is working great to 
> my remote sites.
> Doing gateway to gateway and gateway to client tunnels where I have no 
> network overlap issues.
> Where I am stuck at is I need to NAT my network to a different private 
> network as the remote site already is using my private network range.
> 
> I am using Debian 11 with v5.2.3.4 Shorewall.
> But I have a site where there is an address conflict so I need to remap my 
> 192.168.10.0/24 network to 172.17.87.0/24
> to avoid issues.  They already have a 192.168.10.0/24 network in their 
> systems.
> 
> I need to do the following:
> 
> 192.168.10.0/24 <-> 172.17.87.0/24 <- IPsec tunnel -> 172.28.0.80/29 <-> 
> 172.28.0.82
> 
> Traffic from my 192.168.10.0/24 network needs to have it's addresses mapped 
> to 172.17.87.0/24 network.
> Then sent to the 172.17.87.0/24 to 172.28.0.80/29 tunnel and on to the 
> 172.28.0.82 server on their end.
> Then their replies need to come back across the tunnel and be converted back 
> from the 172.17.87.0/24 network to my 192.168.10.0/24 network.
> 
> I have the tunnel up and functional.
> My issue is how to configure Shorewall to do the 1 to 1 translation and pass 
> on to the tunnel.
> 
> Does anyone have an example of this that I could follow?
> 
> --
> Rich Goodwin
> Elmen Enterprises/Appliance & Furniture RentAll/KTTW
> 2901 W 11th Street
> Sioux Falls, SD  57104
> 
> Voice:  (605) 338-1800 x220
> Fax:    (605) 275-8361
> E-mail: rgood...@rentall-inc.com
> 
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