Spinning Up an Onion Mirror Is Stupid Easy

https://flower.codes/2025/10/23/onion-mirror.html

by speckx • 9 months ago

205 75 9 months ago

simonmales• 9 months ago

This is a good reminder for myself to get some onion addresses for my sites and spread awareness of Tor.

TIL that Onion-Location is a header, only new about the <meta> element.

  <meta http-equiv="onion-location" content="http://<your-onion-service-address>.onion" />

CGamesPlay• 9 months ago

The "http-equiv" in that meta tag means "equivalent HTTP header", FYI.

immibis5• 9 months ago

But it's not always followed. Most HTTP headers aren't interpreted when specified with http-equiv, and vide versa.

ktallett• 9 months ago

I am of the view having a .gopher and .onion version of sites is important for avoiding government blocking where possible and to keep information as free as possible.

szszrk• 9 months ago

can you recommend some gopher server that is actively maintained? I always wanted to host gopher site but could not find a strong solution that I will not be afraid to be easily compromised.

immibis5• 9 months ago

I don't know the answer, but fortunately the protocol is so simple that you have the option to write a short Python script.

extraduder_ire2• 9 months ago

What do you mean by .gopher? Gopher is a transport protocol like http and can work over tor or any other transport just fine.

dewey2• 9 months ago

I'm not sure if this is generally considered acceptable within the Tor network

Tor is already encrypted, that’s why you don’t need TLS. Some services (Like the hidden service from Facebook back in the days) have https but that was more of a vanity from what I remember.

aspenmayer• 9 months ago

Proton also uses HTTPS for their onion site, and they used the same certificate provider as Facebook did for theirs, Digicert, per this page:

https://proton.me/blog/tor-encrypted-email

In the above blog post, they seem to imply that they made HTTPS mandatory for Proton Mail over Tor for security reasons.

adobrawy• 9 months ago

The best is to refer to official Tor project documentation for .onion over https: https://community.torproject.org/onion-services/advanced/htt...

tl;dr: Pressure from browsers, enterprise, and the overall ecosystem to use HTTPS (e.g., unavailability of advanced web features without HTTPS) is pushing for the use of HTTPS without exception, even for .onion sites with no significant technical advantage.

orbisvicis• 9 months ago

Without https can't the last relay snoop the traffic?

edit: oh, is the last relay the onion service? So the entire chain is encrypted?

rendx• 9 months ago

The key used to encrypt traffic is in the URL, everything including path is encrypted from client to the onion service end. What you are saying is true for non-onion HTTP sites, not for onions.

edm0nd2• 9 months ago

side note: there is a built in flag mechanism called BadExit for Tor that if a relay or exit is detected to be malicious, it is quickly removed from being used.

embedding-shape2• 9 months ago

have https but that was more of a vanity from what I remember

It has a functional difference as well, lots of new client-side features (like webcrypto) only work on "Secure Origins" which .onion isn't, but websites behind TLS are. So if you wanna deploy say something that encrypts/decrypts something client-side on .onion, you unfortunately need TLS today otherwise the APIs aren't available.

Of course browsers could fix this, but I don't think they have any incentives to do so. I guess Tor Browser could in fact fix this, and maybe they already do, but it'd be a patch on top of Firefox I think, something they probably want to do less off, not more.

crtasm2• 9 months ago

My understanding is Tor Browser already treats .onion as a secure origin, could anyone confirm?

Ajedi32• 9 months ago

Back when EV certificates were widely supported by browsers, HTTPS was a great way of cryptographically associating a .onion service with a real legal entity, for sites like Facebook which didn't care about being anonymous.

badmoddingyo• 9 months ago

Whats not easy is dealing with harassment from the law as a result.

phaer• 9 months ago

Very unlikely if you just hosting an onion service with legal content, where all traffic is encrypted.

Having to deal with law enforcement is unlikely even if you run a normal, encrypted, TOR relay.

Exit nodes, on the other hand, will most likely get letters or even visits by law enforcement. But those are not involved at all when just running an onion service.

TOMDM• 9 months ago

It does make me wonder if people are running very boring polite websites that can suddenly do very not boring or polite things if you know how to ask the right way over an onion address.

Surely I can't be the only one to think of this right?

jandrese2• 9 months ago

There is one form of harassment though, if you run even just a TOR Relay you tend to be put on realtime blackhole lists regularly which will cause random websites to refuse your connection. Things like banks, ticket sites, even your insurance company might suddenly block your connection because your IP is listed as "Exterme Risk, active threats, verified" on one of like 200 RBL sites because someone scraped TOR and put all of the IP addresses they found on there and tagged them as active threats.

theshrike79• 9 months ago

Which is funny when anecdotal evidence says that over 50% of existing tor relays are controlled by US TLAs :)

mo2• 9 months ago

Anecdotally, I used to be in control of more than half of Tors exit capacity (until I had inspired enough other people to take over), with no association to US TLAs, and I personally know many exit and other relay operators. I have no reason to assume they are affiliated with US TLAs or other TLAs. The majority in terms of numbers may be, but not the majority in terms of bandwidth.

Personally, I doubt the US TLAs have a need to operate any relays themselves. They can simply wiretap, and use control flow data for correlation when necessary. Tor can still be useful for all those who do not try to hide from the few agencies who may have this kind of visibility.

The relay community is pretty good in terms of interacting with each other. There are real-world meetings to get to know others in the space, which may make you also more comfortable seeing their personal reasons for providing bandwidth.

qhwudbebd• 9 months ago

This has prompted me to look at how the Tor Project's Arti reimplementation is going. They've got way further along than I realised:

https://tpo.pages.torproject.net/core/arti/

https://gitlab.torproject.org/tpo/core/arti/-/blob/main/CHAN...

Hosting onion services is apparently still a work-in-progress, though, and turned off by default.

yogorenapan• 9 months ago

I was already able to host onion services last year by using the crate directly. A few footguns related to flushing but it generally works as expected. I will however say that the code quality could be improved though. When trying to contribute, I found a lot of somewhat bad practices such as having direct file read/writes littered around without abstraction which made refactoring difficult (trying to add different storage/cache options such as in-memory only or encrypted)

cncjchsue7• 9 months ago

Opting not to over engineer the solution with abstractions nobody asked for until you came along is the definition of best practice. something not being designed for any and all use cases doesn't make something bad practice. Reading and writing from a filesystem you always expect to available is more than reasonable. Modular code for the sake of modularity is a recipe for fizz buzz enterprise edition.

m00dy• 9 months ago

Letscage [0] is also using Arti to implement its privacy features.

[0] https://github.com/letscage

INTPenis• 9 months ago

It's not a mirror, it's a proxy. If someone encroaches on their free speach and shuts down their hosting account that "mirror" will not save them.

Just saying, this is an important distinction to me and I've been hosting tor nodes since the 2000s.

Archiving information, and making it available, is sometimes more powerful than anonymous proxying.

Especially if there's an anonymous proxy available to that archive. ;)

Retr0id• 9 months ago

As long as they have the private key they can move it to new hosting infrastructure without issue, and the same onion address will still be operational.

a022311• 9 months ago

"Mirroring" is a term also used when a single source publishes data in different mediums (technically in this case we're talking only about the internet but the internet is full of different protocols so I'll call them mediums). For example there are websites that mirror their content to Geminispace or in this case make it available as an onion service.

You are correct that this solution does not prevent problems if the server goes down. This particular approach aims to reach a larger audience, while your idea of mirroring enables resiliency.

Both approaches have their use cases and can even be combined too!

maeln• 9 months ago

It is also very useful to expose services to the world wide web behind a restrictive network, Tor takes care of the Nat punching and all that jazz, and you get free dns and encryption as an extra bonus :)

extraduder_ire2• 9 months ago

NAT punching to ssh is an incredibly useful feature of this kind of setup. As long as the machine has an internet connection, and you know the onion URL, you can tunnel into it and proceed from there. I usually do this to any machine I'm putting behind NAT.

I don't know if onion links are discoverable/crawlable, so I can't claim if this is more secure than just listening on port 22 on the open internet.

torsocks is a very useful tool for easily running programs like ssh through tor with no advance setup.

stephenlf• 9 months ago

What a pleasant read. Informative in all the right places without losing brevity. Thank you.

hshdhdhehd• 9 months ago

Anyone comment on the http thing? Does Tor layer security in that anyway so "Saul Goodman" or is there anything more needed here?

blueflow• 9 months ago

Without having a trustable certificate, the connection can be MITM'ed anyways. Anyone can produce a self-signed cert on demand.

immibis5• 9 months ago

Onion addresses are unforgeable and traffic is encrypted. http over .onion is comparable to http over tls.

mzajc• 9 months ago

The onion address is the certificate, albeit not one that expires or can be revoked. As long as you get it from a trusted source, you should be good.

wartywhoa232• 9 months ago

Oh, and free speech and anti-censorship and all that jazz.

That jazz is increasingly played by the same band of 185.220.0.0/16 exit nodes, and plays it in a scale which is all but Anonymian.

storm1er• 9 months ago

I would like to know more, can you give me some insight?

wartywhoa232• 9 months ago

Well if you use Tor somewhat regularly and check your exit node IP, it is about 50% possible that yours is in that subnet each time you renew the route. Which begs questions.

Maybe I'm wrong, but it would look more benign to have exit nodes distributed without this much bias towards that particular subnet.

5f3cfa1a• 9 months ago

https://nusenu.github.io/OrNetStats/ should give you a feel for the overall size & relative homogeneity of the current Tor network.

flotzam• 9 months ago

No part of hosting or visiting onion services involves exit nodes. Onion service traffic stays within the Tor network instead of exiting to the clearnet.

immibis5• 9 months ago

Run more exit nodes then, and more onion services so they don't need to involve exit nodes.

It's also not such a big deal, provided they aren't messing with your exit traffic which you did encrypt, right? There are few exit nodes, but a great many non-exit nodes which still help anonymize your traffic. If you think it's a problem though, run an exit node.

denkmoon• 9 months ago

I’m sure lots of people would run exit nodes if it wasn’t the equivalent of putting a flashing neon sign saying “please ruin my life mr government” in front of your house

crtasm2• 9 months ago

I have no interest in running a relay or exit node on my VPS, so I made some minimal changes to the config file

Noting the default configuration does not turn your server into a relay or exit node, in case anyone interprets this that way.

Thanks for offering a .onion, bookmarked for the caddy configuration.

deadbabe• 9 months ago

What’s a better place for hosting a .onion, Panaman or Switzerland?

Bender• 9 months ago

Anywhere and on just about anything. The only time a location would be of concern would be on Tor Exit nodes which is not what they are discussing.

edm0nd2• 9 months ago

doesnt really matter. its just regular hosting underneath. I used DigitalOcean for my relays, exits, and hosting.

xena• 9 months ago

I do something similar like this for xeiaso.net (http://ryelkcbr65vy7pzx26c3rvxya54yuh5ciafth7p6d3p3phpgo2wkz...), but I use Kubernetes so I installed the Tor controller: https://github.com/bugfest/tor-controller. I then added an OnionService pointing to the website: https://github.com/Xe/site/blob/main/manifest/xesite/onionse.... It works pretty great!

age123456gpg2• 9 months ago

You can generate yourself a vanity .onion address using https://github.com/AlexanderYastrebov/onion-vanity-address tool. It can also generate vanity client authorization keypair.

tripplyons• 9 months ago

Be careful with vanity address generators. A cryptocurrency market maker once lost around $160,000,000 in a vanity Ethereum address because the generator they used was only seeded with 32 bits of entropy.

https://www.forbes.com/sites/jeffkauflin/2022/09/20/profanit...

age123456gpg2• 9 months ago

Indeed, be careful with anything that involves secret bits.

This tool uses proper crypto/rand initialisation of the starting key https://github.com/AlexanderYastrebov/onion-vanity-address/b...

Check out my other vanity generators (they all use crypto/rand):

https://github.com/AlexanderYastrebov/wireguard-vanity-key

https://github.com/AlexanderYastrebov/age-vanity-keygen

https://github.com/AlexanderYastrebov/ethereum-vanity-addres...

Trung0246• 9 months ago

Unfortunately I got a hard crash on go 1.25.3 when running this: https://github.com/AlexanderYastrebov/onion-vanity-address/i...

superkuh• 9 months ago

One problem with .onion is that it is not for casual sites or people trying to build lasting communities. The Tor Project only prioritizes security and they can and have and will again wipe out the entire tor web to nothing if they feel it is required by security. They have full control of the network. No v2 tor sites exist anymore, none of the communities, they were are just wiped out by the Tor Project because only their security use case matters. They care nothing for communities that use their software. Do not try to build communities on Tor .onion. It'll just be made inaccessible some day. All the hyperlinks will become useless. All the databases of sites, all the discussions, just gone. Because the tor project cannot abide potential lax security of older protocols.

.onion is not a way to own your domain. Even though you may have the private key and no one else does, the true owners of your domain remain the tor project themselves, as they can make it inaccessible to tor clients any time they want. They have before, they will again. And they aren't going to listen to any community feedback about it. Tor .onion is only for people that don't care about longevity or links working. Only for people who have 'security' as their number 1 and only concern.

I wasted a decade building my personal sites and casual communities on .onion. I won't be fooled again. A dot com or org is just as much mine as a .onion is, unfortunately, and at least those don't all disappear every 10 years.

bfkwlfkjf• 9 months ago

I would love to hear more. Have you published this somewhere you wanna share?

jjmarr• 9 months ago

https://news.ycombinator.com/item?id=36261206

ugur2nd• 9 months ago

I'm not an expert. I'm asking because I don't know.

Did I understand correctly? You can create a site with a .onion extension without a domain on a hosting service.

I'm thinking. If you can do it this way with .onion, can you do it with something else? That would be a bit unusual.

If that were possible, being able to customize the extensions would be interesting. Being able to customize brand names. Like .mybrand, or .egg, .bread, whatever you want.

hrimfaxi• 9 months ago

I think you are misunderstanding. You may want to learn more about how onion services work but in the blog post, the hosting service is the author's server/host running Caddy.

https://community.torproject.org/onion-services/overview/

Spinning Up an Onion Mirror Is Stupid Easy

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