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[XG 18] SD-WAN policies ignored? SFOS 18.0.0 GA-Build354

I upgraded to SFOS 18.0.0 GA-Build354 yesterday morning.

Under SFOS 18.0.0 GA-Build339 SD-WAN policies worked fairly well, sending traffic through specific interfaces based on subnet, user, etc.

However, since I the vast majority of traffic is going to the Active WAN-link. Very little traffic is going to the Backup link, even though the policy specifies to use it for certain source addresses.

Anyone else seeing this?

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0 Arie over 5 years ago

Quick update: I changed the type of my secondary WAN-link from "backup" to "active" and I'm suddenly seeing traffic going to it.

Can the SD-WAN policies not send traffic to a backup link?
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0 LuCar Toni over 5 years ago in reply to Arie

I did not test it in Build 354, but there are no changes at all to SD-WAN. So assuming there is no change, it should not changed in the working process.

Could you recover the old status with Backup Interface and show us your Sd-WAN Policy as a Screenshot?

Please take a look at the Gateway as well - Is it online?

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0 Arie over 5 years ago in reply to LuCar Toni

I'll try to find some time over the weekend to revert.

Yes - both gateways are show as "up".
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0 Arie over 5 years ago in reply to LuCar Toni

I'm still wondering whether the SD-WAN policies will send traffic to a WAN-link that's been set to "backup" instead of "active".
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0 Arie over 5 years ago in reply to LuCar Toni

On a related note, I've noticed that the log page often doesn't show the outgoing port. Is this intentional?
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0 LuCar Toni over 5 years ago in reply to Arie

Should be - I am pretty sure, it does.

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0 Arie over 5 years ago in reply to LuCar Toni

LuCar Toni

Based on your reply I have done some more digging. Turns on that on my system shows ports only for connections that use a specific NAT-rule.

I haven't touched my NAT-rules after upgrading from v17, aside from a couple that I created when I cloned some FW-rules. Guess I'll need to take a look at my NAT-rules.
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0 Arie over 5 years ago in reply to LuCar Toni

LuCar Toni

Based on your reply I have done some more digging. Turns on that on my system shows ports only for connections that use a specific NAT-rule.

I haven't touched my NAT-rules after upgrading from v17, aside from a couple that I created when I cloned some FW-rules. Guess I'll need to take a look at my NAT-rules.
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0 LuCar Toni over 5 years ago in reply to Arie

Please be careful: SNAT will only applied after the routing decision is already made. So Basically XG looks at the SD-WAN Routing table, choose a Rule, goes to the NAT Table and takes the specific SNAT Rule, matching for the traffic.

Do you have migrated SD-WAN Rule or not?

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0 Arie over 5 years ago in reply to LuCar Toni

It's possible that SD-WAN was migrated from v17, but I'm not certain. Is there a way to tell?

I do have a lot of NAT-rules that resulted from the migration.
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0 rfcat_vk over 5 years ago in reply to Arie

Hi,

you will see an SD-WAN rule for each migrated NAT which will be a linked NAT. You cannot edit the migrated SD-WAN rules, only delete.

Ian

XG115W - v19.5.1 mr-1 - Home

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0 LuCar Toni over 5 years ago in reply to rfcat_vk

Just to correct the statement.

You will see migrated SD-WAN Rules for each Firewall rule, which had a selected Gateway.

Those rules can act differently to a self created sd-wan rule.

Sophos put some effort to improve the docs.sophos.com page.

http://docs.sophos.com/nsg/sophos-firewall/18.0/Help/en-us/webhelp/onlinehelp/nsg/sfos/concepts/PolicyRouting.html

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