Hey everyone, welcome back to My Weird Prompts. I am Corn, and today we are diving into a topic that feels particularly relevant to our lives here in Jerusalem. Our housemate Daniel sent us a fascinating prompt about the evolution of network-level VPNs. He has been experimenting with his travel router while spending time in safe rooms and underground shelters, which is something we have all had to get used to lately. When you are hunkered down, the last thing you want is for your only window to the outside world—your internet connection—to be a source of frustration because your security settings are breaking your basic apps.
Herman Poppleberry here, and I have to say, Daniel’s timing is perfect. We have talked about portable enterprise networks before, specifically back in episode eight hundred eighty-five, but the landscape of how we handle traffic at the router level has shifted significantly since then. The old way of doing things, what I like to call the all-or-nothing approach, is becoming a major headache for anyone trying to maintain a modern, functional smart home. It is the classic VPN trap. You think you are being secure by putting the whole house behind a tunnel, but then you realize you have just broken the digital plumbing of your entire life.
It really is a trap. You want the privacy and the geo-flexibility of a VPN, so you flip the switch on your router, and suddenly your local banking app thinks you are in Chicago, your printer stops talking to your laptop, and your smart TV starts complaining that you are violating its terms of service. It is a blunt instrument for a world that requires surgical precision. We are living in an era where our devices are constantly talking to each other and to servers all over the globe. Treating all that traffic as a single, monolithic block is just asking for trouble.
And that is exactly what Daniel is poking at. He is looking for that surgical precision. He wants to know how we move from treating the router as a simple tunnel endpoint to treating it as a sophisticated policy engine. We are talking about domain-based split routing, device-specific server assignments, and these interesting hybrid controls where a device can actually signal the router to change its behavior. It is a tall order for a standard consumer router, but with the right stack, it is totally doable. We are moving away from the idea of a gateway that just passes packets and toward a gateway that understands intent.
I think we should start by framing the problem. Why is this so hard? Most people think a VPN is just a pipe, but when you put it on a router, you are essentially rewriting the rules of the road for every single packet in your house. Herman, why has the industry been so slow to give us these granular controls in the consumer space? Why are we still stuck with these on-off switches on most of the routers people buy at the big box stores?
Well, part of it is hardware limitations. Simple routing is easy; it is just looking at a destination IP and sending it out a port. But inspecting traffic and making decisions based on domains or complex policies requires significant CPU cycles. For a long time, consumer routers were woefully underpowered. But the bigger issue is the software architecture. Most consumer firmware is based on very old versions of Linux or proprietary stacks that just were not designed for complex policy-based routing. They assume a single gateway. If you want to change that, you have to get into the world of IP sets, multiple routing tables, and advanced firewall marking. It is a level of complexity that most manufacturers think would result in too many support calls.
Right, and that brings us to the first big technical hurdle Daniel mentioned: domain-based split routing. This is the idea that the router should be smart enough to say, if the traffic is going to Netflix, send it through the United States tunnel, but if it is going to my local bank, send it through the local ISP. How do we actually implement that without the router having to look at every single packet’s contents, which would be a massive privacy and performance nightmare?
That is where DNS becomes your best friend. In a sophisticated setup, you use a DNS forwarder like dnsmasq or Unbound. When a device on your network asks for the IP address of a specific domain, the router does not just give the answer; it also adds that IP address to a special list called an IP set. This is a dynamic process. The router says, oh, you want to go to bbc dot co dot uk? Here is the IP address, and by the way, I am going to put this IP into my special United Kingdom bucket for the next few hours.
Okay, so the router sees the request for, say, BBC iPlayer, resolves the IP, and then tags that IP address in its internal memory as something that belongs in the VPN bucket?
Precisely. On a system like OpenWrt or OPNsense, you can create these IP sets dynamically. Once an IP is in that set, you have a firewall rule that looks for any traffic destined for an address in that set and marks it with a specific bit. We call this firewall marking, or fwmark. Then, you have a separate routing table—let us call it table two hundred—that says, if a packet has this specific mark, ignore the default gateway and send it through the WireGuard interface instead. It is a multi-step dance: DNS resolution, IP set population, firewall marking, and then policy-based routing.
That sounds incredibly elegant, but I can imagine it gets messy. What happens with content delivery networks? If a site uses a hundred different IP addresses or shares IPs with other services, do you end up with collateral damage? I mean, if Netflix and a random data-hosting site share the same Amazon Web Services edge node, does the router get confused?
That is the big risk. You can end up with what we call over-routing. If a domain shares an IP with a service you want to keep local, you are stuck. However, in two thousand twenty-six, most major streaming services and high-traffic sites use dedicated IP ranges or specific subdomains that make this fairly reliable. The real challenge is DNS leaks. If your router is sending the traffic through the VPN but still asking your local ISP’s DNS server where the website is, the ISP still knows exactly what you are doing. You have to make sure your DNS queries are also being routed through the tunnel or encrypted via DNS over HTTPS. If you do not secure the DNS path, the entire split-routing architecture is basically a house of cards.
Let us talk about the hardware for a second. We mentioned that consumer routers struggle with this. If someone wants to do what Daniel is suggesting, are they stuck with a big, noisy server in their closet, or has the tech caught up? Especially for Daniel’s situation in a safe room, he needs something small and efficient.
The tech has definitely caught up. We are seeing a huge surge in these small, fanless x86 mini PCs. Brands like Protectli or even the newer ARM-based units from companies like GL-iNet, which Daniel mentioned using, are surprisingly capable. The key is having a processor that supports AES-NI, which is hardware acceleration for encryption. Without that, your VPN speeds will crawl because the CPU is doing all the heavy lifting of encrypting and decrypting every packet in software. With AES-NI, you can push gigabit speeds through a WireGuard tunnel without breaking a sweat. For a travel router, you want something like the GL-iNet Slate AX or the Beryl AX. They have dedicated network processors that handle this logic much better than a ten-year-old Linksys.
And WireGuard is really the hero of this story, isn’t it? I remember when we were all struggling with OpenVPN configurations that took forever to handshake and killed our throughput. It felt like every time the connection dropped, you had to wait thirty seconds for the world to come back online.
Oh, absolutely. WireGuard’s implementation in the Linux kernel space, which happened back around kernel five point six, changed everything. It is so much more efficient because it does not have to keep jumping between the user space and the kernel space to process packets. It stays within the high-speed lanes of the operating system. For the kind of policy-based routing Daniel is talking about, WireGuard is essential because it is so fast to bring up and tear down tunnels. You can have five different WireGuard tunnels to five different countries running simultaneously on a modern router, and the overhead is remarkably low. As of March two thousand twenty-six, almost every major VPN provider has moved to supporting raw WireGuard configuration files, which makes this kind of DIY routing so much easier than the old days of parsing complex ovpn files.
So, if we have the hardware and the protocol, let’s get into the device-specific server assignments. This was Daniel’s second point. He wants his smart TV on a United States server but his laptop on a local connection. This feels like it should be simpler than domain-based routing because you are just looking at the source IP of the device, right? You are basically saying, if the packet comes from this MAC address, send it through tunnel A.
In theory, yes. This is the classic Policy-Based Routing, or PBR. You tell the router that anything coming from the MAC address of the TV gets assigned a specific internal IP, and then you create a rule that says all traffic from that IP goes to the United States tunnel. Where it gets interesting is when you want to combine this with domain-based routing. What if you want the TV to use the United States tunnel only for Netflix, but use the local connection for YouTube to avoid those annoying international ads? Or what if you want your PlayStation to use a local connection for gaming to keep latency low, but use a VPN for the media apps?
That is where the complexity starts to spiral. You are stacking rules on top of rules. It is like a logic puzzle where the prize is being able to watch your favorite show without a lag spike.
It is a hierarchy. You have to decide which rule takes precedence. Usually, you want the device-specific rule to be the baseline, and the domain-based rules to be the exceptions. But managing this through a command-line interface is a nightmare for most people. That is why we are seeing better software interfaces. OPNsense, for example, has a great system called Aliases. You can group devices, ports, or domains into an Alias and then apply a single firewall rule to that entire group. It makes the logic much easier to follow. If you want to move three different devices to the United Kingdom, you just add them to the United Kingdom Alias, and the firewall rules handle the rest automatically.
I want to touch on something you mentioned earlier about the geo-blocking arms race. We covered this in episode one thousand eight, but it is worth revisiting. Even with a perfect VPN setup, some of these streaming services are getting incredibly good at spotting VPN exit nodes. They look at the IP ranges owned by big data centers like Amazon Web Services or DigitalOcean and just block them entirely. It does not matter how good your routing is if the destination refuses to talk to your VPN.
You are hitting on the geo-blocking fallacy. Simply being in the right country isn’t enough anymore; you have to look like a residential user. This is why we are seeing a shift toward residential proxies. Some advanced users are now routing their traffic from their router through a residential proxy network instead of a traditional VPN provider. It is more expensive and often slower, but it is much harder for a service like Netflix or Disney Plus to detect because your traffic looks like it is coming from a standard home internet connection in a suburb of New Jersey rather than a rack in a data center.
That feels like the next frontier for these router operating systems. Integrating residential proxy support directly into the routing table. But let’s move to Daniel’s third point, which I think is the coolest: hybrid controls. He wants a device to be able to signal the router to change its VPN settings. Imagine being on your couch, opening an app on your phone, and hitting a button that tells the router, hey, move the TV to the United Kingdom for the next two hours. No logging into a web interface, no messing with firewall rules. Just a simple toggle.
That is the dream, isn’t it? The way to do this right now is through API hooks. Most modern, high-end router operating systems like OPNsense or even OpenWrt have a REST API or at least allow for SSH access with key-based authentication. You can set up a system like Home Assistant to act as the middleman. Home Assistant is great at talking to both your phone and your router.
So, Home Assistant becomes the brain, and the router is the muscle. How does that look in practice?
You could have a physical Zigbee button on your wall or a virtual button on your phone dashboard. When you press it, Home Assistant sends a command to the router to enable or disable a specific firewall rule or change the gateway for a specific device. I have actually seen people set this up so that when they open the BBC iPlayer app on their Apple TV, Home Assistant detects the app launch via the Apple TV integration and automatically switches the router’s policy for that TV to the United Kingdom tunnel. When the app closes, it switches back. It is completely transparent to the user.
That is incredible. It completely removes the friction. You don’t have to be a network engineer every time you want to watch a show from another country. But doesn’t that create a lot of churn in the routing tables? Is there a risk of breaking the connection for other devices? If I am constantly toggling rules, am I going to crash the router?
If you do it right, no. Because you are only changing the policy for that specific internal IP, the rest of the network never even knows a change happened. The routing table is just a lookup list. Updating one entry is a near-instantaneous operation for a modern CPU. The real trick is the state tracking. When you switch gateways, any existing connections for that device will probably drop because the external IP address just changed. The TV has to re-establish its session. But most streaming apps handle that pretty gracefully; they just buffer for a second and then resume. It is much less disruptive than a full router reboot.
It sounds like we are moving toward what you called identity-based networking. It isn’t about the IP address; it is about the device and the intent of the user. We are moving away from the old model where a network was just a bunch of wires and toward a model where the network understands who you are and what you are trying to do.
That is exactly where the industry is headed. We are seeing this with things like Tailscale and Headscale. They use a mesh VPN architecture where every device has its own identity. You can set up exit nodes all over the world and then, through a very simple interface, tell specific devices which exit node to use. Tailscale has made this so easy that it is almost trivial, but it still requires an app on every device. Daniel’s point is that he wants this at the router level for devices that can’t run apps, like a smart TV, a gaming console, or even a smart fridge if you really wanted to geo-spoof your groceries for some reason.
Right, the dumb devices that need a smart gateway. So, if we were to give Daniel a roadmap for building this today, in March of twenty twenty-six, what does the stack look like? If he is sitting in that safe room right now and wants to upgrade his setup, where should he start?
First, I would tell him to stick with x86 hardware if he wants maximum flexibility. While those travel routers are great, a Protectli box or a similar small-form-factor PC is the gold standard for this kind of heavy lifting. For the operating system, OPNsense is probably the most user-friendly way to get these advanced features without needing a degree in computer science. It has a great plugin system and the community has built excellent tools for managing WireGuard and policy-based routing. It is much more modern than pfSense and has a more frequent update cycle.
What about the VPN service itself? Are some better than others for this kind of setup? We know some providers are more friendly to router-level configurations than others.
You want a provider that gives you raw WireGuard configuration files. Most of the big names do this now, but some make it easier than others. Mullvad has always been a favorite of ours because they are so transparent and their configurations are very clean. ProtonVPN is another good one. The key is that you need to be able to pull those configuration files into your router without needing a proprietary app. You want the standard public and private keys, the endpoint address, and the allowed IPs.
And for the split routing? How does he actually set up that domain-based magic we talked about?
I would suggest using the OPNsense WireGuard plugin combined with the Unbound DNS service. In Unbound, you can enable a feature that populates an IP set whenever a specific domain is resolved. You create your aliases for the domains you want to route—say, a list of all the Netflix domains—set up your firewall rules to mark that traffic, and then use the policy-based routing to send it out the right gateway. It takes an afternoon to set up and some trial and error to find all the right domains, but once it is done, it is rock solid.
And if he wants that panic button or the hybrid control he mentioned?
Then he needs to lean into the API. He should look at the OPNsense API documentation. He can write a simple Python script or use a Home Assistant integration to toggle those firewall rules. If he is already running a travel router in a safe room, he is likely already comfortable with some level of technical tinkering. It is a bit more advanced, but it is the ultimate way to bridge the gap between network security and user convenience.
I think one thing we should caution listeners about is the KISS principle: Keep It Simple, Stupid. It is very easy to over-engineer your home network to the point where nobody else in the house can use it if you aren’t there to fix it. I have seen people build these incredible systems that fall apart the moment a single configuration file gets a typo.
That is a very fair point. I have been guilty of that myself more times than I care to admit. You spend all this time building a perfect, granular routing system, and then your partner can’t get onto a work Zoom call because a routing rule for a streaming service accidentally caught the company’s VPN range. You have to be very careful with your IP sets and your aliases. Start small. Route one device or one domain, make sure it works for a week, and then add the next one. Documentation is also key. If you are doing complex marking and routing tables, write down what table two hundred actually does.
It is also worth mentioning that sometimes a simple browser extension is actually the better tool. If you only need a VPN for one specific website on your laptop, putting it on the router might be overkill. The router-level VPN is really for the devices that can’t protect themselves or for when you want a blanket layer of privacy for your entire household. It is about choosing the right tool for the job.
Right. And for the privacy aspect, you have to remember that a router VPN doesn’t magically make you anonymous. It just moves your point of exit. Your ISP doesn’t see your traffic, but your VPN provider does. And if you are logged into Google or Facebook, they still know exactly who you are regardless of what your IP address says. We always have to remind people that a VPN is a tool for a specific job—like bypassing geo-blocks or hiding traffic from a local ISP—not a magic invisibility cloak.
Especially in a place like Jerusalem, where network stability can be an issue. If your VPN tunnel goes down and you don’t have a kill switch configured correctly on your router, your traffic might leak out over the open internet without you realizing it. Or worse, your entire internet connection drops and you are left in the dark when you might need it most for emergency alerts or staying in touch with family.
That is a critical point. A good router-level VPN setup must have a robust kill switch. In OPNsense, you do this by making sure the traffic is strictly bound to the VPN interface. If that interface is down, the packets should just be dropped, not redirected to the local ISP. It is a bit of a trade-off because it means your internet breaks if the VPN fails, but for many people, that is preferable to a privacy leak. You can also set up failover, where if one VPN server goes down, the router automatically switches to a second one in the same country.
We have covered a lot of ground here. We talked about the shift from simple gateways to policy engines, the technical implementation of domain-based routing using DNS and IP sets, the importance of hardware like AES-NI enabled CPUs, and the future of hybrid controls via APIs. It is clear that the "all-or-nothing" approach is dying, and for good reason.
It is a fascinating time to be a network nerd. The tools that used to be reserved for enterprise data centers are now available on a fifty-dollar travel router or a two-hundred-dollar mini PC. It gives us a level of control over our digital lives that was unimaginable even a decade ago. We are no longer at the mercy of whatever basic settings our ISP-provided router gives us.
Before we wrap up, I want to address one more misconception. A lot of people think that putting a VPN on their router will slow down their entire network. While there is always some overhead, if you are using WireGuard on modern hardware, the bottleneck is almost always going to be your ISP or the VPN server itself, not your router. The days of the router being the weak link are mostly over, provided you aren't using a bargain-bin device from ten years ago.
We are talking about latencies that are measured in milliseconds. Unless you are a professional gamer where every single millisecond counts for your kill-death ratio, you probably won’t even notice the difference in speed. But you will definitely notice the increase in freedom and the ability to access the content you want, when you want it.
Well, I think that is a great place to leave it for today. Daniel, thanks for the prompt. It really pushed us to think about the current state of network architecture. It is amazing how much has changed since we did those early episodes on basic VPN setups. The complexity is higher, but the control is absolute.
It really has. If any of you listening want to dive deeper into the hardware side of this, definitely check out episode eight hundred eighty-five where we talk about building that portable network. And if you are interested in the broader implications of geo-blocking and how the big tech companies are fighting back with more sophisticated detection methods, episode one thousand eight is a must-listen.
We are so grateful for all of you who tune in every week. We have been doing this for over a thousand episodes now, and your curiosity is what keeps us going. If you found today’s episode helpful, please take a moment to leave us a review on your favorite podcast app. It really does help other people find the show and join the conversation.
Yeah, it makes a huge difference. And if you have a weird prompt of your own, something that has been rattling around in your brain, head over to myweirdprompts dot com and send it our way. We love hearing from you, whether you are here in Israel, in a safe room like Daniel, or anywhere else in the world.
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Alright, I think that is it for episode one thousand fifty-four. I am going to go see if I can tweak the routing table on our home router without breaking anything. Wish me luck. I have a new idea for a script that handles load balancing between three different exit nodes.
Good luck, Herman. You’re going to need it. And please, try not to break the Wi-Fi before dinner. Thanks for listening, everyone. This has been My Weird Prompts. We will see you next time.
Until next time, stay curious and keep your packets marked.
I still can’t believe you actually enjoy looking at routing tables on a Tuesday afternoon. It is like you speak in hexadecimal.
Hey, some people do crosswords or Sudoku, I do routing tables and firewall rules. It is all about the logic, Corn. It is all about the logic. There is something very satisfying about seeing a packet go exactly where you told it to go.
Fair enough. See you later, brother.
See ya.
One last thing for the listeners. When you are setting this stuff up, don’t forget to backup your configuration before you make any big changes. I have learned that the hard way more times than I care to admit. There is nothing worse than having to factory reset your router at eleven o'clock at night because you deleted a critical firewall rule.
Oh, the old restore from backup dance. We have all been there. Definitely backup early and backup often. Most of these systems let you export a simple XML file. Keep it on a thumb drive.
Words to live by. Alright, really leaving now. Bye everyone.
Bye.
And if you are looking for that specific OPNsense plugin we mentioned, it is usually just called the WireGuard service in the standard repository. You don’t even need to add any third-party sources. It is all built right in.
Good catch. It is much more stable than it used to be. The community has done a great job of polishing the interface. It is almost... dare I say... user-friendly?
Let's not go that far, Herman. It's user-friendly for us. For everyone else, it's still a bit of a mountain to climb. But it's a mountain with a great view at the top. Okay, for real this time. Thanks for listening to My Weird Prompts. We will catch you in the next one.
Peace.
