VPN setup between Fortigate and Watchguard

Hello all,

Recently we have purchased a new business and we now need to VPN the 2 sites.
Site A has Fortigate FWF50B router Site B has Watchguard Fireware XTM515.

I've managed to setup the VPN tunnel between the sites and i can easily ping from site B to site A.
However when I ping from Site A to Site B I get a time out.

The way I managed to ping from Site B to Site A is by configuring the Fortigate Policy to allow IPsec.
I'm trying to do the same firewall settings with the Site B firewall (XTM515) and I can't seem to get it right.

This is what I've done so far.
1.  I've ticked "Add this tunnel to the BOVPN-Allow policies" and it shows up in the Firewall list but still can't ping.
2. Manually created the firewall rules to what I think it could be. IPsec - Trusted Network to ANY
3. Disabled NAT

I'm more experienced with Fortigate than Watchguard routers.
Could anyone out there know what sort of firewall settings I need to apply in the XTM515 router.

Fernando MarambioAsked:
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JohnBusiness Consultant (Owner)Commented:
For dissimilar VPN boxes with IPsec:

Phase 1:  3DES or other, DH Group 2, SHA-1
Phase 2: 3DES or same as above, SHA-1
Pre-shared Key.
Main Mode
Try NAT Traversal ON.

Mirror the settings at the other end.

Those are the key settings and I think you will have to set it up manually for 2 different setups.
Fernando MarambioAuthor Commented:
Hi John,

Thanks for that. I can set that up okay with no problem and I can see from the Fortigate side of things that the VPN tunnel is up and running. I can then ping from Site B to Site A, but when I try to ping from Site A to Site B I get a time out. Therefore accessing the network is not possible from Site A to Site B.
Fernando MarambioAuthor Commented:
Hi All,
I've found the solution to it right here.

I was doing all of the right steps as per the doco. However since I already had another VPN tunnel running in the Fortigate WAN 2 it would not allow me to setup a second one. Configured the VPN to WAN 1 in the Fortigate and I was able to get ping reply from both ends.

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Fernando MarambioAuthor Commented:
The VPN setup worked just how it's meant to work.
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