Can I combine two internet connections?

martin363 · 2025-12-03T09:37:22+0000

Unfortunately the maximum possible internet speed at my UK home is 75Mbps down, and 20Mbps up, there is no faster connection available from any supplier.
I connect to this location remotely daily (Tailscale Exit Node), as I am a bit of a digital nomad (foreign travel) and so for me the Upload Speed is actually more important (and limiting) than my download.
If I got a second line with the same connection speed to the property - effectively 2 internet connections, is there any way I could aggregate them so effectively they operate as one connection of 150Mbps down and 40Mbps up though a single device I can then use as a Tailscale Exit Node?
Thanks in advance!!

Subliminal Aura · 2025-12-03T10:47:32+0000

Yes you can !

Sort of !

Will it achieve your expectations - probably not

Your new setup : 2 x load balanced WANs

Usage

If your endpoint allows multiple connections, lets say torrents or hitting a sessionless CDN or even a threaded speedtest. Quick google Youtube too ?

Google Search

In this scenario you'll see 150mbps

HOWEVER for a single session connection to a website/(S)FTP site you'll never get more than 75 mbps

Conclusion

Only consider this if you have multiple users and need more 'overall' bandwidth to share amongst them

R.C.Anderson · 2025-12-03T11:04:29+0000

Have you looked into 4g/5g broadband instead? Might not be available for you (as if you're limited to 75/20 normally, I'm guessing you're in the sticks somewhere), but they often work out at a decent speed (although sacrifice ping). Another alternative, is starlink, again, the pings won't be as good, but might get you slightly better speeds.

Meddling-Monk · 2025-12-03T11:05:57+0000

Hmm, I'm of the impression that Tailscale can't do the link aggregation on its own last time I looked at it. So you might need to look at alternative solutions or you might need something else (another device) in between the Tailscale system and the multi-WAN connections. Or as @R.C.Anderson just posted to get an alternative single connection that can give more bandwidth for the connection (4/5G or other).