On occasion I find myself needing to send a file at least a few gigabytes in size to a friend across our slow ISPs but haven’t found a satisfying solution. I usually end up creating a private torrent with the announce address of my own IP. Even though it’s slow - it basically never reaches my max upload speed for some reason, it is at least resilient if there are ever any network glitches.
Does anyone else face this same challenge?
EDIT: Thank you for the awesome suggestions! I have some homework to do on these
RFC 2549: https://www.rfc-editor.org/rfc/rfc2549
This problem was solved years ago: https://spectrum.ieee.org/pigeonbased-feathernet-still-wingsdown-fastest-way-of-transferring-lots-of-data
Before I moved I used to use my web server.
My Domain . Com / files . Zip And I would set a password on the zip. After they download it, they tell me and I remove the file.
Me and my friend used netcat to transfer 30 GB of files put into a zip. Very fun, would not recommend
Syncthing
Er, wait, are you using Syncthing for its intended purpose of syncing files across devices on your local network? And then exposing that infrastructure to the internet? Or are you isolating Syncthing instances?
Syncthing is not limited to local network. It’s hole punching is one of the major features
Yep, I’ve got a buddy in another country that I needed to share a group of files with, it was several gigs and we were both editing things.
We setup a syncthing connection and once we were synced it just worked. I also use it on my LAN to sync personal files, but to share with him we both just set up a folder and I just shared that one folder with him while the rest of my shares stayed private on the LAN.
Syncthing is amazing.
The fact that Syncthing seems to solve CGNAT on its own has me wondering why there are not more solutions for the server/home side.
Why does Wireguard or any other VPN not work like Tailscale or Zerotier?
Why don’t torrent clients can’t work with IPv6 to seed more?
Why doesn’t Plex adopt a similar mechanic like Syncthing to expose the media over the Internet instead of being a prisoner of CGNAT?
I know I am just throwing different options with my personal frustrations lol, but I hope you get what I am trying to mean, Plex, torrent and home VPN users shouldn’t become masters at networking, especially when the documentation for the tools IS NOT ENOUGH.
Why does Wireguard or any other VPN not work like Tailscale or Zerotier?
tailscale and zerotier are wireguard, but with a public server that helps with NAT. Syncthing uses a public server for that too.
wireguard was specifically made to be as simple and minimalistic as possible.
Why don’t torrent clients can’t work with IPv6 to seed more?
is there such a problem? honest question. But I think that might be a different issue
Why doesn’t Plex adopt a similar mechanic like Syncthing to expose the media over the Internet instead of being a prisoner of CGNAT?
maybe they just don’t see working on it profitable enough
tailscale and zerotier are wireguard, but with a public server that helps with NAT. Syncthing uses a public server for that too.
wireguard was specifically made to be as simple and minimalistic as possible.
Zerotier wasn’t always Tailscale was it?
is there such a problem? honest question. But I think that might be a different issue
You need to be connectable to download from all the peers, likewise non connectable users can’t download from you, and how do you become connectable? By opening your ports, something that might seem archaic from somebody who has totally embraced IPv6.
maybe they just don’t see working on it profitable enough
Yeah maybe.
Just to clarify, I have several workarounds for the 3 issues that have involved spending more money or not to get rid of CGNAT.
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For the 1st one… Well I already mentioned it, I am a ZT and Tailscale user, I did try Wireguard from a VPS once though, but I didn’t like that I was entirely dependant of my upload speed, maybe I had my Iptables wrongly configured but I usually got faster speeds just using ZT or Tailscale (I didn’t need to relay in the US VPS server).
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For Torrenting… I actually haven’t found a solution to use IPv6… I did use a container client to use my VPS at that time though, it being Digital Ocean and thus getting a DMCA letter for downloading TWD me being a LATAM user was… A kinda funny experience, with that said I stopped that project immediately, it was fun to give back to the community with my 24/7 NAS always seeding though.
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For the last point… Well, I do use ZT and Tailscale to access the server myself, but when I want to expose it, I usually do it with a reverse proxy pointing out to my IPv6 address, and more recently using a Tailscale funnel, I haven’t tried it thoroughly, but at least it seems to connect without using Plex’s relays.
As you can see, one needs to be well prepared with workarounds to deal with CGNAT.
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Syncthing has public releays enabling it to work (dunno if one or none need to be public) without both parties being exposed.
Syncthing is not just for LAN use. Even their homepage mentions transmitting data over the internet
I’ve been using it to sync devices over the internet for years. It’s also how people use it to sync from say their desktop to their phones, remote server, etc.
If you watch your network firewall Syncthing does reach out to servers on the internet to help it find other devices so e.g. if you enter the other device’s ID (example ABCDEFG-ABCDEFG-ABCDEFG-ABCDEFG-ABCDEFG-ABCDEFG-ABCDEFG-ABCDEFG) it can reach out over the internet to find that specific ID to pair with. I think Syncthing uses a sort of DHT resolver to find other devices, I know on my firewall I had to whitelist Syncthing’s servers to make it work.
I was going to try to link you some references but their forums seem to have connection issues at the moment, you may want to search around later if you’re interested how Syncthing works over the internet.
It’s very much a WAN solution too. I use it to push my files to a Pi Zero W that’s 200 miles from my house. I use it as an off site store of my files. The Pi is connected as an untrusted device in Syncthing so that all files sit encrypted at rest.
You can use syncthing to transfer files across the internet? How? I thought it was only for local networks
It just works, there’s no “how”. Take one of the devices outside, connect to the internet, done.
wormholeis good; also its CLI.Wormhole or croc
Create share links allowing anyone with the link (+ optional password) to browse and download individual files, or whole folder contents.
If someone needs to send me a file, I can create a user for them in a few seconds; so they can upload to that as well.
I’d have to have friends across the internet that wanted files first…
You could try wormhole. It makes a direct connection.
Or croc which is very similar. I think it also allows to resume file transfers.
Friends I know IRL: Thumbdrives.
Friends I only know via the Internet: Torrents or IRC filesharing.
Though knowing that a homing pigeon with a thumb drive is actually faster than the fastest Internet network on the planet, maybe I should simply invest in a coop and some pigeons. 🤔
Though knowing that a homing pigeon with a thumb drive is actually faster than the fastest Internet network on the planet
Depends on how big the flash drive is, I suppose. Need to send a 1GB file? Just make a torrent. Need to send 40TB? Yeah, that hard drive is getting driven across town.
Perhaps two pigeons could carry the hard drive on a string. I’ve heard tell of swallows that have done this with coconuts.
Exactly what kind of pigeons are we talking about here? Or would you recommend switching to an avian variant of the migratory type?
Super easy. Spin up an OpenVPN server, forwarding the right ports to your server. Now spin up an Apache server with the folder your file’s in as server root. Send the client config for your VPN to your friend, along with the local address of your HTTP server. Now they can install the OpenVPN client on their PC and download the file from your HTTP server. Once you’re done, tear down all your servers, and don’t forget to unforward the ports. Couldn’t be easier.
/s
I have non-ironically gotten responses like this
Okay can you explain why thats a sarcastic answer? Is one of those first three steps way harder than I think it is?
Cause that’s not simple or easy at all. It takes a fair bit of knowledge to set up all of these things.
openvpn and apache can be very time consuming to set up if you do it for the first time
Upload to Proton Drive > Create share link > Share link
I literally just set up a container for Erugo for this exact thing. It worked perfectly and was super easy to do. It’s just a self-hosted version of wetransfer. Could be helpful…
I’d go for syncthing over nextcloud for your specific usecase. Nextcloud isn’t good for unreliable connections and they’re sticking with the annoying decision of not supporting server to server synchronization.
If they are local, you can just put it on a thumb drive and physically transfer it.
If they’re not local, you can put it on a pen drive and mail it to them.
Absolutely, that is definitely preferred when possible!
