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Things You Should Know About Tor

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Re: Things You Should Know About Tor

#61
I actually tried to get Tor relay working.

It ate all my monthly bandwidth limit within an hour. By simple analysis I found out it's mostly BitTorrent traffic, but I didn't dig very deep so I might be wrong.

I would love to run a Tor relay, but I just do not have unlimited bandwidth to do that.

Re: Things You Should Know About Tor

#62
post #60
post #48

Earlier quoted context omitted.

The onion addresses of hidden services are not themselves secret. The onion address is in fact well known, published in the directory. It's only your server's IP that a hidden service is hiding. So please, don't treat knowledge of the onion address itself as a secret! You still have to authenticate to your service in some way.

Are you saying there is a complete directory of onion addresses?

There isn't a definitive/exhaustive directory, but see this post: http://donncha.is/2013/05/trawling-tor-hidden-services/

tl;dr it's possible, and you don't have to rely on crawling the web searching for .onion addresses. You can instead become a HS directory authority, and pick your place in the DHT. Eventually you'd be able to get every address that goes into the DHT.

Re: Things You Should Know About Tor

#63

Earlier quoted context omitted.

a) The NSA collects first and targets later b) The NSA may control the exit node your traffic is going through vs the NSA collects all network traffic from everywhere. Using tor do add an additional anonymity layer.

This is incorrect and dangerously misleading. The NSA collects data that crosses the US border. An internet user in America is more likely to have their data cross a border if they use TOR. In this respect, TOR makes your data more likely to be collected unless you have reason to believe you're already being monitored anyway.

But only exit nodes are the problem here. Traffic between nodes is encrypted anyway. If the encryption is sound (and there is no reason to assume the contrary), they may collect as much as they want.

There is anyway no guarantee at all, that non-TOR traffic doesn't cross borders. And you can't assume that any three letter agency acts within the (intended) legal boundaries. To be safe, only end-to-end encryption helps.

Re: Things You Should Know About Tor

#64

I had been meaning to run a Tor relay for a while. The EFF Tor Challenge [0] motivated me to get it done. It was incredibly easy. If you have a VPS with unused bandwidth, please consider taking a few minutes to set up a Tor relay. [0] https://www.eff.org/torchallenge/

Keep in mind though when setting this up to take a close look at your exit policy settings, to ensure you only route the traffic you want and where you want it.

I span up a relay at home to play around with, but just skimmed over the exit policy settings and ended up running an exit node. Not big deal really, as it was only advertised for about 14 hours before I noticed and disabled it. It was only after a few weeks when my girlfriend was complaining she kept getting messages from websites refusing to show her content on the basis that she was connecting over the Tor network (which she wasn't) that I realised my home IP was blacklisted, and it took a while for me to get a new lease and IP.

I'm not telling people to not run exit nodes, but people shouldn't just go and spin up a Tor relay with default settings, because it will by default run as an exit node, and depending on the hosting provider, this may or may not be an issue.

Re: Things You Should Know About Tor

#65

I agree Tor isn't as slow as many think. It's just slightly slower. My biggest problem with Tor, though, is having to enable Javascript even for common tasks, like logging in to Reddit, which hopefully they aren't doing on purpose, considering Reddit is known for a site where you can use pseudonyms as much as you want.

Have you tried https://ssl.reddit.com/login?

Re: Things You Should Know About Tor

#66

I'm probably going to take some flack for this, but I don't trust Tor. When you access Tor, you're masking your origin IP to the remote address by trusting one of a couple hundred volunteer exit nodes who raised their hands and said "Trust me! You can route all of your internet traffic through me and I promise I won't monitor or inject anything..." I think most Tor users don't have an adequate understanding of the th…

I hope you realize you just described the entire Internet. Which is the ultimate irony of complaining about the security of tor: you're trusting someone else to forward your packets. Yes, yes they can modify the traffic to and from your host, and yes, yes they can monitor everything you're doing. The difference with the non-tor Internet is that it's far far easier to do that.

You're absolutely correct in that it is a trust issue. However, when Comcast forwards my packets they have both a profit incentive to not go stealing my all of my credit card info (their customers would quickly take their business elsewhere) and a legal incentive (they're a known entity inside the US - someone's going to court). With Tor, I'm putting all of my trust in someone likely on the other side of the globe who has only given me no more identifying information than an IP address and promises no more than that they'll offer me free bandwidth. That person could have set up shop a few hours ago and may be gone tomorrow.

And what if they did sslstrip your connection to your bank's website? Would Tor catch it if the exit node only did it for a week or two and only to .5% of the connections? Would any of the victims be able to determine the source of the attack? How many people on Tor actually keep track of what exit nodes their traffic is going through?

Re: Things You Should Know About Tor

#67
post #61

I actually tried to get Tor relay working. It ate all my monthly bandwidth limit within an hour . By simple analysis I found out it's mostly BitTorrent traffic, but I didn't dig very deep so I might be wrong. I would love to run a Tor relay, but I just do not have unlimited bandwidth to do that.

It would seem there is more demand than supply when it comes to Tor relays. If there were a safe, anonymous way to pay for using Tor relays (Torcoin?), then there would be a lot more incentives to have people run relays. That means the speed will be bumped up and at one point there will be an equilibrium between supply and demand. The system might also provide preferential treatment to users who are willing to pay more.

Discuss.

Re: Things You Should Know About Tor

#68

Things I've used Tor for: - Accessing BBC Liveplayer as if I'm in England (using lots of normally discouraged add-ons and defined exit-nodes) - Bypassing paywalls (possibly still criminal?) - Bypassing censorship (which is what it really is) on organizational wifi networks (in Canadian hospitals). The funniest block was to ginger.io, a big data smartphone data analysis play (but blocked by an over-aggressive filter f…

Commenting on news site which shows IP address from work after some incident where IP got banned for a while for some comment. Problem is simple google search with IP and the site in question shows all the comments you wrote "anonymously" from work and it may cause problems.

Also TOR is heavily used by shills in same sites (namely Russian ones), so it's not too uncommon to stumble upon IP that is already banned.

Re: Things You Should Know About Tor

#69
post #17

Things I've used Tor for: - Accessing BBC Liveplayer as if I'm in England (using lots of normally discouraged add-ons and defined exit-nodes) - Bypassing paywalls (possibly still criminal?) - Bypassing censorship (which is what it really is) on organizational wifi networks (in Canadian hospitals). The funniest block was to ginger.io, a big data smartphone data analysis play (but blocked by an over-aggressive filter f…

I use Tor hidden services to punch through NATs (mostly for SSH); it's also useful in that only you can access the service (since only you know its address), so a hidden service + random port is a cheap "port knocking" implementation. I've also used Tor to debug firewalls. It's a good way of saying "put me in a random spot on the Internet." Outside of that, I use Tor for whatever I can: downloading RSS feeds, instant…

Latency is a problem for me. Maybe for some users, who already have very slow internet, or who live in areas with more TOR relays, it is not so noticeable, but for me the speed difference is about 10 times. Mostly not because TOR would be unbearably slow (it is not slower than regular internet 8 years ago), but because regular internet is very fast where I live.

Re: Things You Should Know About Tor

#70

>They have been able to compromise certain Tor users in specific situations. Historically this has been done by finding an exploit for the Tor Browser Bundle or by exploiting a user that has misconfigured Tor. I'm not touching TOR until I figure out how they managed to capture Ross Ulbricht. I highly doubt that he had his TOR misconfigured.

He exposed his email address containing his name as a contact email for silkroad business, so he pretty much gave himself in. With that kind of "attention to details", I wouldn't be surprised if he even had misconfigured TOR.
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