Self-Hosting on the Dark Web

1 day ago (david.alvarezrosa.com)

My personal website has been hosted on Tor for years. It's easy to do from your home even behind a NAT because it's an outgoing connection from your point of view (which also makes it a great way to expose local services even when you are behind a NAT and don't not have a static IP), and by design your personal IP is hidden from your visitors.

I wrote about it in 2600 almost ten years ago (already?!). A copy of my article can be found here: https://pablorauzy.fr/outreach/2600/how-to-run-a-tor-hidden-...

If you have an Onion copy of your website, don't forget the Onion-Location http header which will automatically redirect Tor Browser users to the onion version of the website even if they visit it at the clear web address.

If it interests people, I also have a follow up article about I2P: https://pablorauzy.fr/outreach/2600/how-to-run-an-i2p-hidden...

What I really love about Onion sites is that if they are big enough, performance engineering really becomes Tor-specific. A few examples:

- Making assets embedded as base64 (img src the header logo as base64, all CSS should be inline, etc.).

- Leveraging CSS as much as possible (if you use animations and transitions, use CSS as much as possible for these, avoid JS for them).

- Make sure your website is mostly rendered on the backend. If you're to have JS, your website should work without it.

- Security becomes REALLY fun, as in, avoid XSS, CSRF, SQL Injection attacks and any other injections as much as possible.

As someone summarizes in another comment[0], keep the chattiness as minimal as possible. By chattiness I understand they mean, pack as much data as you can in the same Keep-Alive connection. Avoid making new HTTP requests as much as possible, as each one might get assigned to a new Onion route making things slow.

If you can ship your website to the browser in a single connection, you've won.

I've always been impressed by performance of these big Onion sites, they really push the limits of software engineering creativity, given these constraints and nature of Tor.

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[0]: https://news.ycombinator.com/item?id=49872320

EDIT: Formatting of bullet points.

  • Also DDoS becomes a problem, and the ways it's done are pretty specific to Tor. Double captchas are necessary when you're getting DDoSed, due to performance reasons. Oh, and captchas are also pretty specific to Tor as well.

    There's also a problem of site fronting. Anyone could run a proxy pretending to be you, for arbitrary reasons (not even necessarily the obvious forging and credential stealing). Every site, even a personal blog, has dozens of parasitic fronts, either actively malicious or dormant. You need off-site ways to tell users what is the real address, and provide a smoke test for them (often a part of the address as a picture, for example in a captcha).

    >avoid JS for them

    Using any JS defies the point and makes your site instantly suspicious.

    • > There's also a problem of site fronting. Anyone could run a proxy pretending to be you, for arbitrary reasons (not even necessarily the obvious forging and credential stealing). Every site, even a personal blog, has dozens of parasitic fronts, either actively malicious or dormant. You need off-site ways to tell users what is the real address, and provide a smoke test for them (often a part of the address as a picture, for example in a captcha).

      How can you do this without relying on the normal web? Let’s say you use a normal website to show the onion link, if the website gets taken down, you lost your user-trusted mean to do that.

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    • I've done some searching and can't find a description of "site fronting" that fits with my read of your comment.

      I thought the whole point of Tor is that I (and only I) am able to serve traffic at a .onion URL that I have generated. How could someone else get in front of that?

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  • Are these simply good ideas regardless of tor?

  • Until you got to the network traffic tricks, those were good practices for any landing page you want to open quickly!

Besides using a separate port, I would also suggest running the hidden service on a non-127.0.0.1 bind address, just in case you ever host something else on that port and forget to disable the hidden service:

> HiddenServicePort 80 127.13.37.1:8080

> listen 127.13.37.1:8080;

This way, strangers won't be able to connect to a service bound to 127.0.0.1, should you ever decide to re-use the port and forget to disable the hidden service.

You'll also need to use separate ports and/or bind addresses if you host multiple hidden services and don't want people to correlate them - if nginx doesn't match the Host header, it will serve whichever site comes first alphabetically.

What is the benefit of building the same website twice with different hostnames instead of using relative links to content on the same domain?

  • Fair point. Very small things like RSS, canonical link or og:url or microformats use absolute URL

    To make sure once in the .onion, you never leave the .onion

I thought about doing this back when I was self-hosting my blog, purely because I thought there would be a neatness factor to being able to honestly say "I have a site on the dark web".

I eventually moved the blog to Cloudflare Pages primarily because I wanted to use Cloudflare Workers to handle the comments, though I have still considered dual-publishing it just to still say I've done it.

I recommend that people give I2P and Yggdrasil a try as well, especially Yggdrasil. It makes no compromises on speed and latency, but it has no anonymity.

Besides accessing your page are random people able to use your server as an exit node? Am I thinking the right thing... I met someone in Switzerland that was hosting anonymous exit nodes to some anonymous network and he said that it was a pain having to explain what was happening to the police.

  • Exit node are an entirely optional part of the Tor network. If you run a relay or a hidden service you are not forced to participate in the exit node side of things. It's also not recommended to combine these roles because it could have security implications for your hidden service.

  • The exit nodes of Tor are a big weakness of the connective layer with the internet. For this reason I prefer to think of Tor as its own internet. Exit nodes are basically just inefficient VPNs. If traffic stays inside Tor it stays secure.

  • Running a Tor exit node is a manual process. Running a hidden service like a website, or chat server doesn't involve anything like that.

In a guide like this, it might be helpful to emphasize backing up the generated private key, loss of which would cause you to have to change your onion address.

absolutely love how OP's site is designed. It's clean and minimal, fast and user-friendly, but also stylish.

Adds a whole new layer of paranoia, but for some things, it's probably the only way to genuinely stay off the grid.

> so that no single party can link who you are to what you are doing

some single parties called government agencies pretty much can. it’s just much harder to do, so you’re safe from random people

  • we have been hearing this all the time whenever Dark Web is being discussed, but fact of the matter is that all the big darknet market busts have been done in past because of sloppy opsec by their operators and not some magical government wand which can pinpoint location of a hidden service

    • It's also a matter of whether it would be worthwhile to reveal the existence of such a capability in a given case.

      If I were a government and had just spent a pretty penny on implementing the necessary infrastructure to defeat an encrypted routing scheme, I would probably not use that capability to bust internet drug dealers and other petty criminals, resulting in everyone scattering to a new scheme or to seek security through obscurity in some hand-rolled solution. I'd save it for national security level threats. High value targets.

      Though thinking about it further, it would still be workable to gather compromising information on low-value targets without necessarily acting on it.

      1 reply →

A few more tips.

1. If you want to improve page load speed you need to buy a HTTPS certificate so you are not limited to HTTP/1.1. Multiplexing in HTTP/2 is important for getting sites to load fast.

2. You can set the HiddenServiceExportCircuitID configuration to pass the circuit id to your web server for telemetry or anti abuse purposes. Otherwise your logs will say that all users are coming from the same IP.

https://blog.cloudflare.com/cloudflare-onion-service

  • Fascinating, onion services are always encrypted by the tor network but still tunnel "cleartext" http inside that, and there are no CAs that issue free of charge certificates for .onion domains, and therefore there's no free of charge way to get http/2 on onion services without self signing.

    Which raises the question: why not just trust self-signed certificates on onion services? From my brief look it seems to be because the Tor project views the primary purposes of HTTPS on onion services to be other things rather than just http/2 support: http/2 isn't even mentioned on their page about https for onion services (https://community.torproject.org/onion-services/advanced/htt...). Unfortunate.

    • I personally would support automatically trusting self signed https certs since their key is typically secured under the same safety as the hidden service's key. And even when they are not the browser has no warning when you get downgraded to HTTP on an onion compared to a regular site.

      Trying to push hidden services to stay on HTTP is going against what the rest of the web is doing and as a minority of web traffic it really should be aligned to the rest of the web and also require HTTPS. Yes, it's technically wasteful, but reduces both work and security risk by keeping security models aligned with the rest of the web.

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No DNS, no CA, no exposed IP. Just a ridiculously long string of characters and a bit of determination.

I like the idea of TOR, but whenever I used it, I hit a speed penalty.

This, in turn, handicaps me searching for information. If they could fix this problem then I would be more likely to make use of TOR. We really need to think long-term about a future web that isn't ruined by Google etc... while also not being locked down such as via age-gating.

  • I think it must depend on how far away you are from a gateway into the Tor network. There's a slight delay for getting the network ready when I start Tor on my devices, but after that it's not so bad.

    Tor amplifies the problems caused by badly written websites that do a billion HTTP calls (unless you have HTTPS enabled on Tor) which does make it noticeably slower in a few edge cases, but I don't think it's as bad as its reputation suggests. For this particular blog, the Tor version loads maybe a couple hundred milliseconds slower, mostly because of images coming in slower (content is ready almost immediately).

    Lots of hidden services seem to be under constant DDoS attack, though.

    There are still plenty of issues with TOR (my main gripe is the "domain names" being practically impossible to recognize/trust or tell anyone about in the real world), but I don't think speed is the biggest factor anymore.

The one thing I learned from hosting superkuhbitj6tul.onion (from a home computer) for ham radio and science stuff for about a decade was that EVERYTHING ON A .ONION IS EPHEMERAL. When the tor project correctly decided that for high security torv2 no longer was anonymous enough they unilaterally wiped out every torv2 .onion site that existed. Every link that was made between these sites came to an end in 2021 when they released a tor client without support for torv2 onions and tore the web to pieces.

Know this: the "dark web" is not for people who just want to own your domain name. It's for SECURITY and that use case is going to drive all their decisions. And if it wipes out every community in the entire tor dark web? So be it. And they'll do it again. Don't build your communities on the sand that is the dark web. You won't like the result.

  • Don't tie anything to a domain name you mean. Advice that's just as valid for clearnet.

    v2 onions being deprecated was announced long in advance so many sites managed their transfer by announced the new URL well in advance. I don't think anyone was really bothered.

    • Oh, and all the links got re-written to the new URLs then? Between every site? No, they didn't. If every link breaking, every write-up about sites, every single reference across the entire .onion web breaking doesn't seem like a problem to you I'm not sure what to say.

      Yeah, some sites told their users about their new v3 domain. But the web was entirely destroyed.

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  • You're not wrong about significant brittleness and lack of sovereignty (and the same should be said about the web, too, roughly speaking), but I don't think your prescription is correct. Thus far, my only solution has been to maintain a variety of gateways to the same signed object which itself provides the evolving list of connection gateways. Gotta stay ahead of the whackamole through diversity, imho. I've found my i2p and tor identities have actually been some of the longest lasting, especially compared to non-bigcorpo clearnet web hosts. That's definitely not how most people want to use the net, ofc, but it's probably the right kind of practice that we should collectively be engaged in together if we want communities that actually own the means of production about as far as we reasonably can atm. And, these days, LLMs make this process much, much easier, too, as rediscovery and rebuilding custom infra per individual or community is far more doable for the average person (if they really wanted to do it, and I'm not claiming they would*).

Imagine if normal people could install a single normal application and just run a website from a folder. CLI makes it more difficult than hosting a normal website. Typing commands you don't understand doesn't seem all that of a great idea.

Nice thing is you skip port forwarding entirely, which matters a lot if your ISP has you behind CGNAT. Curious how people handle uptime though, since a hidden service going down isn't something you notice until someone tells you.

Ran a small onion site for a couple years and the nice part is you never touch a public IP or a cert. Downside is onion v3 addresses are impossible to share verbally and the latency makes anything chatty feel broken. Static pages only, honestly.

  • You have to keep chattiness low, but a lot of SSR stuff works fine. Dread uses SSR, and even nags you if you have JavaScript enabled.

the thing that surprised me running an onion service was reachability, not setup. a fresh or restarted service can take a while before clients find it, so anything that has to work on first try needs a fallback. and if some of your users are where tor is blocked, plain tor isn't enough, you need bridges like obfs4 or snowflake