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VLAN on a singular router without physical separation is not secure. OP was asking for feedback, that's my feedback. It's accurate.
Thx for the feedback, I don't have multiple router no. If I had would it be still called VLAN? I thought the V was Virtual for achieving that LAN segmentation with one router. With one router, don't you think the security added is the same level as configuring a firewall on each VM/LXC ?
Your understanding is correct.
Multiple routers is irrelevant and ridiculous.
Well it wouldn't matter if your router is the thing that someone gets into. All you're doing is separate traffic in different subnets, and if that's your goal, you're good to go.
You are aware that a firewall rule is how you would address - in software, with logic - someone trying to get from VLAN C to VLAN A, right?
That its part of the method you'd use as a layer of security to prevent someone gaining access to.your router?
Assuming the router is compromised from the start is similarly just nutso.
You are aware that being on the router would have access to ALL the ingress and egress interfaces, right?
That's not how any of this works.... At all.
No, its managed by the firewall. The existence of a VLAN does not grant it access to egress. The firewall needs to permit that behavior.
Your entire understanding of how a logical network works is wrong. I'm not trying to be a dick - this is just really bad information that you're sharing.
JFC 🤦
How are you NOT understanding what OP thinks is happening, versus what you thinks is happening?
If I get shell access to this router I have access to ALL NETWORKS. VLAN won't help any of this.
HOW WOULD YOU GET SHELL ACCESS TO HIS ROUTER FROM A FIREWALLED OFF VLAN THAT DOES NOT GAIN ACCESS TO THE MANAGEMENT VLAN THE ROUTER IS ON.
Holy crap dude.
BASIC networking.
Lolz at you. Sweet baby Jesus, you have no idea.
Take a networking class instead of spewing nonsense please.
Take your own advice: https://www.n-able.com/fr/blog/vlan-hopping-security
For some reason you think a home router can't be gotten into because of a VLAN of all things🤣
You're sitting here worrying about some packets from the internet being safe for some reason and not realizing the big picture. Go back to Innernette learning school, tough guy.
Take a networking class. You have numerous fundamental misunderstandings and make wild assumptions on bridging gaps that has specific requirements to occur, which also requires a complete lack of any other security methods.
Take a networking class, please. You need it.
Edit: You're mad and still down voting, I want to point out you dont even understand the link you provided.
You should probably read that. But looooooong before then, you should take an actual class on networking.
You need it.
Thats my line.
I'm also done having any sort of discussion with you, there is a fundamental misunderstanding of logical network design here, and I have no interest in correcting that. Enjoy your day.
That's... Insane feedback.
But sure.
Please inform me of how that's..."insane"?
Because the overwhelming majority of multiple vlan use, and proper use at that, is going to be managed by a single firewall at the end. Because that firewall is going to manage intra and inter vlan communication, and to suggest that requires a different physical router is... Wild.
Because logical network design - regardless of egress - is a vital component of any security implementation.
Because having a multiple egress solution that doesn't rely on a software based connection (VPN) would be absolutely bonkers for a self hosted solution at home.
There are just... So many things that are absolutely buck wild crazy to me in what you've said. And not in a fun 'yee haw' kind of way, but a "boy oh boy if that could be bottled it would sell like hotcakes on the street" sort of way.