tor-relays February 2023

tor-relays@lists.torproject.org

27 participants
21 discussions

Questions about Tor consensus weight & swag
by shruub 19 Feb '23

19 Feb '23

Hello, so my relay regulary gets overloaded, for what I can only assume is an hardware issue, (which I can't upgrade rn) since I already applied the tor anti ddos scripts. It seems to be able to recover, however with a lower Consensus Weight. I also (stupidly) tried to have a cron restarting my tor daemon daily which also resulted in the latter. So I wonder, if there is any way to have a relay run more stable and I suppose with a somewhat higher consensus weight (I can only asssume making some further changes in advertising bandwidth etc. My second question(s) is/are concerning the tor swag (I hope that's allowed to ask here). Firstly, what is the actual Speed requirement? In the tor ecosystem, every unit is MBs, and only on the swag site its KBs. But if my calculations are correct, 500KBs = 500000Bs = 0.5MBs which doesn't really make sence, imo(but I probably misscalculated somewhere). Secondly, does running mean it's uptime (aka Last Restarted) or the Time it was first seen? Sorry for the wall of text for not much information, and thanks a lot in advance for your replies! Best, shruub

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disable moderation on tor-relays again?
by nusenu 15 Feb '23

15 Feb '23

Hi, can we try to disable moderation on this list again and see how it goes? If it gets out of hand you can always move back to a moderated mode or a mode where the first email of a sender is moderated. kind regards, nusenu -- https://nusenu.github.io

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Use OutboundBindAddress on multi-instance tor servers
by nusenu 13 Feb '23

13 Feb '23

Hi, to reduce the risk that your multi-instance tor relay setup triggers false-positive filter thresholds on other relays, I recommend you make use of the OutboundBindAddress (or OutboundBindAddressOR) option and set it to the same IP as in the ORPort line. This will ensure that the outbound source IP will be the same when connecting to relays. The man page is not clear what tor's default without that setting is but I guess that would leave it to the OS to pick the source IP and that could result in all your tor's using the same source IP. relayor users are covered by default, no further action required. https://github.com/nusenu/ansible-relayor/blob/2bc62d62f85b62c51a38d9caa893… kind regards, nusenu -- https://nusenu.github.io

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publish current AuthDirMaxServersPerAddr limit?
by nusenu 12 Feb '23

12 Feb '23

Hi, would it be possible to publish the currently enforced value of AuthDirMaxServersPerAddr on some tpo website? Maybe consensus-health.tpo? kind regards, nusenu -- https://nusenu.github.io

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HowTo use relayor's Prometheus Integration (relayor v23.1.0)
by nusenu 12 Feb '23

12 Feb '23

Hi, relayor v23.1.0 is released. It comes with: * a minor security fix that needs manual intervention * support for more than 2 relays per IP * a major simplification for users of the prometheus integration. * removal of the tor_dedicatedExitIP feature. relayor now implements conf.d support for prometheus. This includes a few backward incompatible changes. Full Changelog: https://github.com/nusenu/ansible-relayor/releases/tag/v23.1.0 With the release I also published this guide that should help users get started with relayor's prometheus integration: https://github.com/nusenu/ansible-relayor/discussions/239 kind regards, nusenu

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Questions about 4 Relays per IP and the ddos mitigation scripts
by Chris Enkidu-6 08 Feb '23

08 Feb '23

Hello Everyone, Before I make changes to [my scripts](https://github.com/Enkidu-6/tor-ddos), I need to understand a few things and any help is much appreciated. - First, Does an Exit relay with zero Guard probability and zero middle relay probability need to initiate circuits with a Guard or middle relay and assuming it fails, would that affect my relay, relaying traffic to that Exit node as a part of my own circuit? To clarify the question, I have 2 Established connections to two Or Ports of an exit relay, the relay has no connections to me, Does that break anything? - I have a few Exit relays as permanent residents in my block list, not because I want them to be there but because, no matter how many times I remove them, day or night, they'll be back in seconds for making too many concurrent attempts. I'm assuming this is due to the fact that Exits are being used to attack other relays but I may be wrong which is why I need someone to clarify this for me and hence another reason for question one. - Each relay has Established connections to many other relays and if they're guard they will also have many connections to regular users and their Tor browsers until they have enough traffic to reach their MaxAdvertisedBandwidth. Obviously we don't Establish connections to all 6300 relays out there. So if we do not allow each IP more than two connections and they need 4, They'll have two from us and they'll move on to another relay and get the other two and get the job done and we will reach our Max Bandwidth anyway by accepting traffic from other relays. Diversity of relays as opposed to concentration of some relays. Am I correct in my assumption that this will have little to no effect on the health of the Tor network as a whole? Thanks for reading, I'm not going to make this longer than it is already.

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tor relay shows offline @ tor relay search while running
by theyarewatching＠disroot.org 03 Feb '23

03 Feb '23

Good day, My relay shows offline on the Relay Search page but according to NYX the relay is always running. I am running two relays on on Proxmox through my home network. Please inform me of what info/logs you may need to help diagnose this. Thank you for your time and help. TAW

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Ensure servers with >2 relays per IP do not get hit by rate limiting firewalls (by other relays)
by mail＠nothingtohide.nl 03 Feb '23

03 Feb '23

Hi Tor operators, Some of us took/will take advantage of the increase in allowed Tor relays per IPv4 address[1] to reduce costs for running Tor relays. This change will result in more relays sharing the same source IP address than before, which means other relays using rate limits on their ORPorts might need to make sure they do not unintentionally block relay to relay connectivity. Many relay operators deploy TCP SYN rate limiting packet filters theses days due to the ongoing DDoS issues. With the increase in Tor relays per IPv4 address, there might be more (new) connection coming from the same source IP. If you have strict TCP SYN rate limits per source IP, please ensure that this change does not result in blacklisting relay to relay traffic. You could for example whitelist relay IP addresses or have less strict rate limits for them. Thanks for reading, https://applied-privacy.net https://nothingtohide.nl [1] https://gitlab.torproject.org/tpo/core/tor/-/issues/40744

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4 relays per IP address are allowed from now (Feb 2023) on
by Georg Koppen 02 Feb '23

02 Feb '23

Hello everyone! You might recall that Tor is restricting the possible amount of Tor relays per IP address to 2, mainly for Sybil prevention reasons.[1] Given that Tor on the relay side at least is not multithreaded yet (and will likely not be for the near and medium future) that's wasting a lot of useful resources as many servers can easily handle more than 2 relays. Additionally, IPv4 addresses are scarce/expensive. I have good news for you, though. Thanks to a push by our relay operator community we raised that limit to 4 with the help of the directory authorities (by having set `AuthDirMaxServersPerAddr 4` on a majority of them) and, depending on how that experiment goes, consider raising it even to 8. Thus from now one should be able to run 4 relays per IP address. We are looking very much forward to seeing a bunch of additional relays entering the network and making it stronger. :) For more details, information and discussion see: tor#40744.[2] Thanks, Georg [1] https://gitlab.torproject.org/tpo/core/torspec/-/blob/main/proposals/109-no… [2] https://gitlab.torproject.org/tpo/core/tor/-/issues/40744

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(Save the date) Tor Relay Operators Meetup - 2023-01-28 @ 19UTC
by gus 02 Feb '23

02 Feb '23

Dear relay operators, Save the date: our next Tor relay operator meetup will happen on January 28 at 19:00 UTC! We're drafting the agenda here: - pad: https://pad.riseup.net/p/tor-relay-op-meetup-j28-keep - onionsite: http://kfahv6wfkbezjyg4r6mlhpmieydbebr5vkok5r34ya464gqz6c44bnyd.onion/p/tor… Feel free to add topics and/or questions. Room Link - https://tor.meet.coop/gus-og0-x74-dzn cheers, Gus -- The Tor Project Community Team Lead

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tor-relays February 2023