I have this architecture (without the firewall). I bought a Watchguard M570 as Firewall to add it in my network. My Question is : Could i use my watchguard and connect this one to my 2 LoadBlancers and route each one to its network as i draw in the picture ? enter image description here

  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can post and accept your own answer.
    – Ron Maupin
    Commented Nov 19, 2022 at 23:50

1 Answer 1


Sure. You can use policy-based routing (by source address) to connect each LAN side to its own load balancer.

You'd be more flexible though if you connected the WAN links to the Watchguard directly and balanced everything there.

  • Do you think, i can aggregate the 2 Links in the wathchguard m570. I tooked a look in the datasheets but i didnt find any think about its limits concerning making load balancing
    – mydi88
    Commented Oct 29, 2019 at 20:14
  • I'm not familiar with Watchguards, but load balancing is just a matter of stateful policy-based routing, so whether one or more WAN links is used shouldn't matter much and the same limits should apply.
    – Zac67
    Commented Oct 29, 2019 at 20:32
  • Question should be whether fw should be placed before or after load balancers, what is the best practice.
    – hakkican
    Commented Mar 7 at 8:36
  • @hakkican There's no single 'best' way to do it. As stated above I'd go without the load balancers unless there's a rigid requirement to use them. If there is, it all depends on what the firewall can and can't do. If it's up to the task, you should put the firewall in front of everything.
    – Zac67
    Commented Mar 7 at 11:00
  • best practice means widely chosen or applied based on some reasoning, it is a design issue and decision, why should someone put the firewall in front of everything? and why should someone put it behind the load balancers? I am after some explanation; pros, cons, etc.
    – hakkican
    Commented Mar 8 at 6:01

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.