Video on how to configure OSPF across an IPSEC Tunnel on the Sophos XG

I finally got it fixed. My issue was routing priority.

By default XG (17.0.8MR8) is using the following routing precedence:

1. Policy routes
2. VPN routes
3. Static routes

I went into the CLI used option 4 to get to the console and then changed the precedence with: 

console> system route_precedence set vpn policyroute static

I'm now seeing ESP traffic in wireshark and no HTTP traffic when accessing the webserver from my client

UPDATE:

I give up.. the traffic was unencrypted again after a reboot of the XG appliances.... RED tunnels seems like the only option

Hi Kenneth,

Here's what we did (although we're using iBGP instead of OSPF)

-Using the Public IPs as local and remote networks in the ipsec config(just like in the KB), use the GRE IPs as local and remote networks in ipsec and finally use the subnets at each site in the ipsec config. You need all three(or more if you have more than one local subnet on each side.)

So at the end of the day you'll have at least three definitions for local and remote sides(wan ip's, GRE endpoints, and finally each sites subnets you want to talk back and forth)

-Scott

Hi Scott,

I will give it a try today :-) But are you sure the routing is carried over iBGP in your example and not because of you adding the networks in the IPSec config? The reason i wanted to use a dynamic routing protocol in the first place was because of the benefits of dynamic routing and not having to configure all the networks in the IPSec config

UPDATE:

I made a factory reset of both XG Appliances (testing environment) and then followed the KB again. But this time i added both WAN and GRE ip in the IPSec local trusted network and remote trusted network and the wireshark pc is now showing ESP packages instead of the ICMP and HTTP traffic i use for testing. BUT rebooting the appliances makes the traffic unencrypted again. It seems like the GRE is coming up before the IPSec tunnel and then the traffic goes over that instead of IPSec

UPDATE2:

Adding the local and remote networks as well to IPSec didn't make any difference

Hello Kenneth,

Just saw the messages. Are you particularly looking to use iBGP or any dynamic routing protocol? 

Thanks.

Hi David,

OSPF is my preferred protocol in this test. But I'm willing to test iBGP if that works

"But are you sure the routing is carried over iBGP in your example and not because of you adding the networks in the IPSec config?"

Yeah, routing is carried over iGBP, I can see all the BGP routes populate in the information tab under BGP screen after it gets it routing table pushed to it(takes a couple minutes). In my case the other side of the connection is a Cisco router.

You didn't create any GRE routes by chance ?  We don't have any GRE routes in place in our setup on the Sophos.  We also didn't change the routing order preference either.

-Scott

"But are you sure the routing is carried over iBGP in your example and not because of you adding the networks in the IPSec config?"

Yeah, routing is carried over iGBP, I can see all the BGP routes populate in the information tab under BGP screen after it gets it routing table pushed to it(takes a couple minutes). In my case the other side of the connection is a Cisco router.

You didn't create any GRE routes by chance ?  We don't have any GRE routes in place in our setup on the Sophos.  We also didn't change the routing order preference either.

-Scott

Thank you for you answer Scott,

I can see the same with OSPF without putting the subnets in the IPSec config.

Nope, I have only created a Point-to-Point GRE tunnel.

I made a factory reset yesterday when trying your suggestions, so my routing preference is in default order now