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Site to Site Custom tunnel with VLAN

Forum|Forum|3 years ago
June 3, 2022
2 replies
4913 views

Good day!

I am having trouble with my configuration, I can successfully established connection with both firewall but I cannot access the VLAN on the branch firewall.

Here is my config:

HQ

Local Subnet: 192.168.100.0/24

Remote Subnet: 192.168.50.0/24

BRANCH

Local Subnet: 192.168.50.0/24

Remote Subnet: 192.168.100.0/24

Static Route HQ:

Destination: 192.168.50.0/24

Gateway: 122.8.182.207

Static Route BRANCH:

Destination: 192.168.100.0/24

Gateway: 222.81.180.201

My firewall policies:

HQ FIREWALL

VPN1:

incoming interface: hq-to-branch

outgoing interface: lan

source: all

destination: all

service:all

NAT: disabled

VPN2:

incoming interface: lan

outgoing interface: hq-to-branch

source: all

destination: all

service:all

NAT: disabled

BRANCH FIREWALL

VPN1:

incoming interface: hq-to-branch

outgoing interface: lan

source: all

destination: all

service:all

NAT: disabled

VPN2:

incoming interface: lan

outgoing interface: hq-to-branch

source: all

destination: all

service:all

NAT: disabled

My problem is I cannot access the following VLAN subnet in the branch firewall

10.10.20.0/24

10.10.30.0/24

Thank you in advance!

FortiGate

Best answer by sw2090

either that or leave the p2 selector at 0.0.0.0/0.0.0.0 and have routing plus policy handle the rest.

Also on s2s you don't need to enter a gateway. The IPSec Tunnel as destination interface for the static route is enough.

Works fine here this way with various vlans on both sides :)

seshuganesh

Staff

Hi Team,

I could see you have added "192.168.100.0" and "192.168.50.0" as local and remote phase 2 selectors, you need to add the networks which you want to access in the local and remote phase 2 selectors.

Then you need to configure static routes for the same.

Here in your scenario, you did not defined "10.10.20.0" and "10.10.30.0" networks in phase 2 selectors of the firewall.

You can use this article for your reference:

https://docs.fortinet.com/document/fortigate/6.0.0/cookbook/281288/site-to-site-ipsec-vpn-with-two-fortigate-devices