tor-relays August 2023

tor-relays@lists.torproject.org

27 participants
17 discussions

(EVENT) Tor Relay Operator Meetup - June 24, 2023 @ 18.00 UTC
by gus 10 Aug '23

10 Aug '23

Hello, The next Tor Relay Operator Meetup will happen on June 24, 2023, at 18.00 UTC. We're working on the agenda here: https://pad.riseup.net/p/tor-relay-op-meetup-june-keep onionsite: http://kfahv6wfkbezjyg4r6mlhpmieydbebr5vkok5r34ya464gqz6c44bnyd.onion/p/tor… Feel free to add other topics to the agenda. WHERE Room link: https://tor.meet.coop/gus-og0-x74-dzn Registration No need for a registration or anything else, just use the room-link above. We will open the room 10 minutes before so you can test your mic setup. Please share with your friends, social media and other mailing lists! cheers, Gus -- The Tor Project Community Team Lead

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short conntrack DDoS attack
by Toralf Förster 09 Aug '23

09 Aug '23

Few days ago the throughput of my Tor relay went down to nearly zero for about 3 minutes. It turned out that the reason (maybe) was a change here in my iptables rules. Especially I switched these 2 lines: iptables -A INPUT -m conntrack --ctstate INVALID -j DROP iptables -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT and run then few hours later into problems. And switched back ofc. An explanation for the dropdown was given in [1]. Given that the explanation is right: How is the Tor application harmed if an attacker mangles packets so that the state of them are INVALID for the conntrack module but they do pass the RELATED,ESTABLISHED rule ? [1] https://forums.gentoo.org/viewtopic-p-8798034.html -- Toralf

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Re: [tor-relays] Middle relay IP blocking
by torserver 08 Aug '23

08 Aug '23

Roger, I had the same problem with 3 financial websites blocking my IP address while running a middle relay. Exactly 5 days after stopping the relay these sites can be reached again. They probably use the same mechanism, visible in the TPRB Firefox plug-in. I run my home relay on a low energy consuming Raspberry Pi. Why is there no perfectly detailed instruction to install a relay on the Raspberry? With its built-in VNC it can be managed by SSH and remote desktop perfectly. Then there is no need for data congestion on a few cheap providers. One Watt power consumption only costs 3 Euros a year. Snowflake almost uses no data with a few occasional users. I 'd like to use my 100 Megabits more efficient. Regards, me. > Date: Tue, 8 Aug 2023 02:32:03 -0400 > From: Roger Dingledine <arma(a)torproject.org> > To: tor-relays(a)lists.torproject.org > Subject: Re: [tor-relays] Middle relay IP blocking > Message-ID: <ZNHhY1rj8rQAId0y(a)nogrod.csail.mit.edu> > Content-Type: text/plain; charset=us-ascii > > On Mon, Aug 07, 2023 at 11:28:32PM +0300, s7r wrote: > > While all the above is true, a thing to remember is to make sure we don't > > end up all renting too many VPS'es or dedicated servers in the same places / > > same AS numbers - we need network diversity, it is a very important factor, > > more AS numbers, more providers, more physical locations, etc. So, running > > at home is super good and recommended from this perspective, provides us > > with the diversity we need, however not being to login to online banking to > > pay an electricity bill because of a middle relay is also way too annoying.. > > however who can afford the hassle should definitely run a middle relay or > > bridge at home > > Yes, exactly this. If you are interested in running a non-exit relay at > home, and you can tolerate the hassles from occasionally finding that > some service doesn't want to hear from you, then you are definitely > helping the diversity of the Tor network. > > Having the Tor traffic concentrated at a few cheapo providers like Hetzner > and OVH is not only scary in the sense that too much traffic goes through > too few cables, but it's also scary because it increases the appeal for > somebody to attack those few companies, either by breaking into their > infrastructure to watch traffic or through more traditional insider > threats like getting an employee there to help them monitor traffic. > > The internet already has uncomfortably many bottlenecks -- too few > undersea cables, too few Content Distribution Networks (CDNs), too few > app stores, etc. > > > (even Exit relay, I do run an Exit relay at my office place > > and I had one police visit in like 8 years or so). > > Follow this advice only with great caution. :) Many people happily > run their exit relay from their home, but it only takes one fresh new > cybercrime detective (trying to make a name for himself by kicking down > a door at 7am, and with no idea what Tor is) to ruin your day. > > --Roger > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > tor-relays mailing list > tor-relays(a)lists.torproject.org > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays > > > ------------------------------ > > End of tor-relays Digest, Vol 151, Issue 9 > ******************************************

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Middle relay IP blocking
by Eldalië 08 Aug '23

08 Aug '23

Hello there! I've been running for over 1.5 year a middle relay on an IP address I also use to browse, withous issues. However it's now some weeks since many websites that always refused tor traffic started to also refuse normal traffic from my IP. I suppose this is related to the relay, because I don't run any other "suspect" service on this IP and when I change it the problem is gone for a few hours. My guess is that some widely used black list started including middle relay IPs, but I have no proofs. Has anyone had similar experiences? Any thoughts on this? Thanks, Eldalië -- Eldalië My private key is attached. Please, use it and provide me yours!

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Help Turkmens to bypass Internet censorship: run an obfs4 bridge!
by gus 02 Aug '23

02 Aug '23

Dear Relay operators community, The parliamentary elections in Turkmenistan are coming up very soon on March 26th[1], and the Turkmen government has tightened internet censorship and restrictions even more. In the last few months, the Anti-censorship community has learned that different pluggable transports, like Snowflake, and entire IP ranges, have been blocked in the country. Therefore, running a bridge on popular hosting providers like Hetzner, Digital Ocean, Linode, and AWS won't help as these providers' IP ranges are completely blocked in Turkmenistan. Recently, we learned from the Anti-censorship community[2] and via Tor user support channels that Tor bridges running on residential connections were working fine. Although they were blocked after some days or a week, these bridges received a lot of users and were very important to keep Turkmens connected. How to help Turkmens to access the Internet =========================================== You can help Turkmens to access the free and open internet by running an obfs4 Tor bridge! But here's the trick: you need to run it on a residential connection -- you won't need a static IPv4 --, and it would ideally be run on more robust hardware than just a Raspberry Pi (although that can help, we have found they can get overloaded). You can set up an obfs4 bridge by following our official guide: https://community.torproject.org/relay/setup/bridge/ After you setup a new bridge, you can share your bridge line with the Tor support team at frontdesk(a)torproject.org, and we will share it with users. A complete bridge line is composed of: IP:OBFS4_PORT FINGERPRINT cert=obfs4-certificate iat-mode=0 Check this documentation to learn how to share your bridge line: https://community.torproject.org/relay/setup/bridge/post-install/ Just sharing your bridge fingerprint is not the best, but it's fine. You can read more about censorship against Tor in Turkmenistan here: - https://gitlab.torproject.org/tpo/anti-censorship/censorship-analysis/-/iss… - Snowflake blocked: https://gitlab.torproject.org/tpo/anti-censorship/censorship-analysis/-/iss… Thank you for your support in helping to keep the internet free and open for everyone. Gus [1] https://en.wikipedia.org/wiki/2023_Turkmen_parliamentary_election [2] https://ntc.party/c/internet-censorship-all-around-the-world/turkmenistan/17 https://github.com/net4people/bbs/issues/80 -- The Tor Project Community Team Lead

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How do I set up a conjure Bridge?
by Poojith Bestha 01 Aug '23

01 Aug '23

I have a question. How do I set up a conjure bridge? Is the process hard? What hardware do I need to use? Regards, Poojith

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Receiving abuse reports for Non-Exit Relay
by admin＠prsv.ch 01 Aug '23

01 Aug '23

Hello all, In the past 24 hrs, I have been receiving complaints from my hosting provider that they're receiving hundreds of abuse reports related to port scanning. I have no clue why I'm all of the sudden receiving abuse reports when this non-exit relay has been online for months without issues. In addition, I have other non-exit relays hosted by the same provider with no issues and more across other providers. I proceeded to reinstall the OS and reconfigure Tor. I was then quickly notified by my hosting provider again of more abuse reports all showing port 22 as target port. I have not changed my torrc at all and it's still setup as a non-exit relay. No other applications/services were installed alongside Tor. Tor Metrics does not show the relay as Exit either. It feels like Tor Exit Traffic is leaking through my non-exit relay? Has anyone else experienced any behavior similar to this? Any ideas on how to fix or prevent this? prsv admin

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