IPSec VLAN Passthrough

[DK101]

Hi,

I am fairly familiar with StrongSwan and its configuration however not having so much luck with pfSense.

I have a site-to-site VPN setup and each site has 2 vlans / subnets configured on it. I m splitting the IPSec tunnel so that only traffic destined for the remote networks passes through the IPSec tunnel.

Site 1
10.0.100.0/24
10.0.10..0/24

Site 2
10.10.100.0/24
10.10.10.0/24

My issues is I am unsure how to stop the local traffic of the site from also been passed through. When the IPSec tunnel is active I can no longer access any local networks. I know this is due to the setting of my leftsubnet to 10.0.0.0/8 however I will have more remote sites up in the future which will also fall within this subnet.

I would usually add the following to the strongswan ipsec.conf However I have found doing this in the /var/etc/ipsec/ipsec.conf is unreliable as the file is automatically generated.

conn bypasslan
	leftsubnet = 10.10.0.0/16
	rightsubnet = 10.10.0.0/16
	authby = never
	type = passthrough
	auto = route

Is there someway I am missing that this is accomplished with firewall rules?

Cheers