How to use your home IP address while travelling: five ways compared
Router VPN, Tailscale, a travel router, a commercial VPN, or a sharing app. What each one gives you, where each one breaks, and which survives a household whose only always-on device is a phone.
Most guides on this start with the router. Ours starts with the reason the router advice fails for a lot of people: carrier-grade NAT. If your home ISP puts you behind it, and plenty of providers in Vietnam, Brazil and India do, there is no public address on your router and no port you can forward. The first four steps of the usual tutorial work fine. The fifth one has nothing to point at.
So before picking a method, find out what you're working with. If your router's WAN address starts with 100.64 through 100.127, that's CGNAT and options 1 and 3 below are out unless your ISP will sell you a public address. This page checks it for you.
There's a second thing worth settling early. A commercial VPN gives you an address in your country. It does not give you your address. For a bank that has watched the same home line sign in for three years, those are different events, and the second one is the one it trusts.
The router you already own
FRITZ!Box has WireGuard built in. So does Freebox. In Korea, ipTIME routers are the common answer, and GL.iNet sells small ones whose entire purpose is this. You enable the server, export a config, scan it on your phone, done. No subscription, nobody else in the path, and the traffic really does leave from your house.
It needs two things you might not have: admin access to the router, and a reachable address. Dynamic DNS covers the second if your address changes but is still public. CGNAT kills it. So does a building where the landlord owns the router.
The failure mode is worth thinking about too. You're nine time zones away, the power blips, the address changes, and the person at home has never opened a router page in their life.
Tailscale, with an exit node at home
Tailscale joins your devices into one private network and lets you route through any of them. Free for up to six users, six operating systems, and it gets through NAT on its own, which is exactly the problem the router option can't solve. If you're technical, this is usually the right answer.
Two catches. Something at home has to stay signed in and awake, which in practice means a computer rather than a phone. And exit nodes carry everything or nothing: Tailscale's own documentation says exit nodes cannot restrict which destinations they reach, and ACLs decide who may use an exit, not where that traffic may go. Fine for your own devices. Less fine the day you want to let a cousin use it.
A travel router in your bag
A pocket router that holds the tunnel so your laptop, tablet and work phone don't each need configuring. It also insulates you from hotel networks that block or intercept things.
It solves your end, not the home end. You still need option 1 or option 2 waiting for you. And it's one more object to carry, charge and explain at security.
A commercial VPN
Two clicks, works anywhere, nothing to run at home. If what you want is privacy from the café Wi-Fi, stop reading and use this. It's the right tool and the rest of this list is overkill.
For looking like home, it's often the worst of the five. The address belongs to a datacentre that thousands of people share, and services that score addresses know that. A datacentre address in your home country can draw more suspicion than the honest foreign address you're actually on.
A sharing network, which is what we build
SparkUp Circle is a private group. One device at home is the way out, everyone you invite connects through it, and nothing is counted between members. The device at home can be an Android phone, and the person holding it installs an app and scans a QR code. That's the whole setup.
NAT is our problem rather than yours. Two devices try to reach each other directly first, and when that fails traffic goes through a relay that only ever sees encrypted packets. On a mobile carrier using CGNAT, our own punch test brought up a direct path in about 700 ms and moved 42 Mbps; the same pair without the coordinated punch managed roughly 1 Mbps over IPv6. Some pairs still can't get a direct path, and then you're on a relay and you'll feel it in the latency.
The thing we have that the mesh VPNs don't is rules about where traffic may go. Ports, protocols, addresses and domains, and your home LAN blocked in code with no setting that opens it. That matters more when the group is your family rather than your own laptops.
Where it's worse: it's early. Android and Linux today, Windows and macOS in development, no iOS app. And a Circle hands you the home internet, not the home network, so the NAS and the cameras stay unreachable on purpose. If reaching those is the point, you want the router or Tailscale.
Side by side
| Your real home address | Survives CGNAT | What has to run at home | Limit where traffic goes | |
|---|---|---|---|---|
| Router VPN | Yes | No | The router | Only if the router has rules |
| Tailscale exit node | Yes | Yes | A computer, signed in | No |
| Travel router | Depends on the far end | Depends | Still needed | Depends |
| Commercial VPN | No | Yes | Nothing | No |
| SparkUp Circle | Yes | Yes | An app on a phone or PC | Yes |
About banks
Most people arrive at this question because a banking app stopped working abroad, so it's worth being careful here. Some banks let customers switch on a block for foreign logins as a security feature, and Korean banks do offer exactly that. A few national identity services refuse foreign addresses deliberately. Routing through home may well make the app behave, but if your bank publishes a travel procedure, use it. That's the path that doesn't end with a frozen account and a phone call you can't make from another time zone.
Picking one
If you control the router and have a public address, use the router. If you're technical and someone at home can keep a computer on, use Tailscale. If the only always-on device at home is a phone, or you want a say in where other people's traffic can go, that's the gap we're building for. And if you just want hotel Wi-Fi to stop reading your traffic, a commercial VPN is fine and you can ignore everything above.
SparkUp is in early access on Android and Linux. If it fits, join the list. If one of the other four fits better, take that one.