this post was submitted on 10 Aug 2024
588 points (98.4% liked)
Privacy
31837 readers
84 users here now
A place to discuss privacy and freedom in the digital world.
Privacy has become a very important issue in modern society, with companies and governments constantly abusing their power, more and more people are waking up to the importance of digital privacy.
In this community everyone is welcome to post links and discuss topics related to privacy.
Some Rules
- Posting a link to a website containing tracking isn't great, if contents of the website are behind a paywall maybe copy them into the post
- Don't promote proprietary software
- Try to keep things on topic
- If you have a question, please try searching for previous discussions, maybe it has already been answered
- Reposts are fine, but should have at least a couple of weeks in between so that the post can reach a new audience
- Be nice :)
Related communities
Chat rooms
-
[Matrix/Element]Dead
much thanks to @gary_host_laptop for the logo design :)
founded 5 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
could matrix.org be as easily blocked, since it's decentralized I'm wondering?
At least it means that Signal is working as intended if they are blocking it, I guess that they don't have back doors.
Being decentralized prevents DNS or IP blocks but not blocks through DPI.
Signal has an option to masquerade it's traffic as regular HTTPS, I don't know if Matrix can do such a thing.
https://x.com/signalapp/status/1821979304626155930
I can answer this! All matrix calls are over https APIs. Ports and addresses are stored in a text file on the base domain or in DNS txt entry.
Thanks, nice to have someone knowledgeable.
Would you say matrix is censorship resistant? I've very limited knowledge of it but given what you said I imagine that if I was trying to block matrix I would just need to query the url of the text file and check the DNS text entry, if either exist just add the domain to the blocklist.
Ok this raises a question for me. How do you find a url like this which wouldn't be like, "linked on their site" or something? I know it must be possible to like dump a URL list for a site to a textfile, I'm just wondering how.
Like say I want to find all the super secret pages on www.subgenius.com, they link some but say www.subgenius.com/pam1/pamphlet.html wasn't directly linked (it is, but pretend lol) but could be accessed by the URL, how would I find that URL? Can you just run like
someprogram -a www.subgenius.com -o subgenius.txtbecause that would be cool.Maybe I've misunderstood how it works. I thought that when connecting to a matrix instance you would point to the domain name and the text file would be on a standard location (as with
/robots.txtor all the files in/.well-known/) so it would be easily discoverable. In fact I just checked and matrix does use/.well-known/so one should be able to identify matrix servers by querying these URLs. Unless their is a way to use a non-standard location, but that would require further configuration on the client I guess.And just to answer your question, the only way to find some hidden file would be to brute force. This could obviously be extremely time consuming if the URL is long and random enough, especially if you add rate limiting (this last thing could be circumvented by using multiple IPs to scan, which would be easy for a state actor).
Edit: I've just realized I wasn't answering to the same person, the first part of the message was more for @[email protected]
Yeah the main thing is that the ports and addresses can change and it's nbd. From a firewall perspective, it's impossible to block them all. Especially when the clients are doing mundane https requests. Even if the server goes down or partial connectivity, the channel can still be used.
But this seems easy to automatically block, no? If a client is querying an unknown domain check for some Matrix related data in
/.well-known/and add it to the block list if there is. And since the servers are publicly advertising the port used you just need to periodically check the list of known matrix domains you are creating in the first step.Russia is already doing DPI and blocking ESNI so that seems easy. A more widespread usage of ECH would help everyone, as is Signal advocating, but that's not the case yet.
Ah maybe I've misunderstood then, lol. I didn't know any of that. Oh well!
Matrix is in fact decentralized but in reality it is not so much, I don't know the number exactly but the majority of users use the matrix.org server
Those numbers only include instances that have telemetry enabled
Do you have numbers without?
How would you?
No clue, not familiar with Matrix to that level.
I mean, that's not specific to Matrix. Telemetry is the tool used to get the numbers, so I don't see how you would collect numbers on servers that don't report numbers.
Theoretically they could be reported by federated servers that do have it enabled
But you would miss all the numbers from non-federated instances.
Im surprised there are zero calls to any official matrix server(s) from those instances.
Not even random API for metadata, update status, etc?
Telemtry is a word. It only means as much as it means in each context, and without full context it means little atm.
Do you have a resource where I could learn more about what data Matrix considers telemetry?
The whole point of not being federated is not to call the other servers. I don't run a server but I hope it's not calling home if specifically configured to not be federated.
People who live in countries where DNS and IP blocks are common probably use a different server. I've been running my own for over a year and it works like a dream
Or SimpleX?
It cannot be easily blocked especially if you use your own homeserver every homeserver replicates the channel and it can operate without the original server! That's why signal and telegram are inherently flawed.
To be devils advocate in a sense, this may mean that it doesn't have any backdoors that Russia or Venezuela can use, but the NSA or something still could have one of their own.
Matrix doesn't have encryption as the default
Also Signal doesn't have any backdoors. I can say that with high certainty as it has been audited more than any other messager.
It doesn't matter if it is a business entity operating under a government then you can never really know because gag orders. Centralized servers can be blocked. Telegram and Signal apps could have a back door. This is why open stack is important. And not just the code. Also encryption is default for p2p one on one conversations. It's not in channels by default because it can complicate public use.
Yes