August 2021 - tor-relays - lists.torproject.org

Network experiments on the Tor network
by Georg Koppen 25 Aug '21

25 Aug '21

Hello everyone! As you might have seen we had announcements on this list a couple of months back about experiments being run on the live Tor network.[1][2] This shows that our network is quite popular among researchers, which is great. However, it means as well that there are a bunch of questions that might be concerning, like how this in general affects relays, which role the Tor Project should play in this process, how we can be transparent both to our users and our relay community while experiments are running, how we can avoid different experiments, running simultaneously, affecting each other etc. etc. We therefore sat down a bit and wrote up our thoughts and reasoning on a wiki page[3] which is hopefully helping to answer those questions some of you might have. Needless to say, feedback is much appreciated as this document is nothing set in stone. Georg [1] https://lists.torproject.org/pipermail/tor-relays/2021-May/019649.html [2]https://lists.torproject.org/pipermail/tor-relays/2021-May/019672.html [3] https://gitlab.torproject.org/tpo/network-health/team/-/wikis/Network-exper…

1 0

Relay on CentOS8
by Totor be 25 Aug '21

25 Aug '21

Hi all As you might be aware, CentOS is switching from CentOS Linux to CentOS Stream https://www.centos.org/cl-vs-cs/ They provides a straightfowrarw way to migrate from Lunix to Stream: #dnf swap centos-linux-repos centos-stream-repos #dnf distro-sync I have migrated a relay running in a small VM and everything seems to run fine Before migrating my production relay, I would appreciate any feedback from other CentOS users on this migration: disk space required, eventual issues envountered and more generally do's & don'ts Thanks a lot!

2 2

ORPort NoAdvertise & NoListen Not Working
by Gary C. New 24 Aug '21

24 Aug '21

Hi! I'm having issues when implementing the NoAdvertise & NoListen options of the ORPort directive and am hoping someone here might be able to point me in the right direction. I can get Tor to successfully work as a relay without using the NoAdvertise & NoListen options of the ORPort directive, but for certain reasons I need to configure Tor on a Private Address. ### ORPort WITHOUT NoAdvertise & NoListen (SUCCEEDS) ### Note: Successful Self-testing logs WITHOUT NoAdvertise & NoListen Aug 13 00:26:42.000 [notice] Self-testing indicates your ORPort 198.91.60.78:443 is reachable from the outside. Excellent. Publishing server descriptor. Aug 13 00:27:49.000 [notice] Performing bandwidth self-test...done. Note: Successful Self-testing torrc WITHOUT NoAdvertise & NoListen # cat /tmp/torrc Nickname ASUSWRTMerlinRelay ORPort 198.91.60.78:443 SocksPort 9050 SocksPort 192.168.0.1:9050 ControlPort 9051 ExitRelay 0 DirCache 0 MaxMemInQueues 192 MB GeoIPFile /opt/share/tor/geoip Log notice file /tmp/torlog VirtualAddrNetwork 10.192.0.0/10 AutomapHostsOnResolve 1 TransPort 192.168.0.1:9040 DNSPort 192.168.0.1:9053 RunAsDaemon 1 DataDirectory /tmp/tor/torrc.d/.tordb AvoidDiskWrites 1 User tor ContactInfo tor-operator@your-emailaddress-domain Note: Nyx shows Tor build the initial 5 measurement circuits and then successfully continues to build new circuits # nyx nyx - gnutech-wap01 (Linux 2.6.36.4b...) Tor 0.4.5.7 (recommended) ASUSWRTMerlinRelay - 198.91.60.78:443, Control Port (open): 9051 cpu: 30.4% tor, 62.1% nyx mem: 53 MB (21.4%) pid: 14372 uptime: 05:18 fingerprint: 02DD61E41B3739C629C5CF8CEBA6000290BC3E7B flags: Fast, Running, Valid page 2 / 5 - m: menu, p: pause, h: page help, q: quit Connections (807 outbound, 9 circuit, 1 control): Note: Openssl s_client is successfully CONNECTED to the Public Address # openssl s_client -connect 198.91.60.78:443 CONNECTED(00000003) depth=0 CN = www.uy24fd6wkrzss.net verify error:num=20:unable to get local issuer certificate verify return:1 depth=0 CN = www.uy24fd6wkrzss.net verify error:num=21:unable to verify the first certificate verify return:1 --- Certificate chain 0 s:/CN=www.uy24fd6wkrzss.net i:/CN=www.bu5cm42gttwqzick.com --- Server certificate -----BEGIN CERTIFICATE----- MIICQzCCAaygAwIBAgIJAOPPF6uxLfr8MA0GCSqGSIb3DQEBCwUAMCMxITAfBgNV BAMMGHd3dy5idTVjbTQyZ3R0d3F6aWNrLmNvbTAeFw0yMTAzMDEwMDAwMDBaFw0y MTA5MjUwMDAwMDBaMCAxHjAcBgNVBAMMFXd3dy51eTI0ZmQ2d2tyenNzLm5ldDCC ASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAM/1zzI/PdYXIm6p1ZshOzIf AnUfauCPovIutPWBBNi9Q6um6EWYzb7DIKhmiTwijl691ktfylwVIMT8JnGO+1t1 +SooiSp4V1oSkMvoA0Whvhh3jonblvq7cD0FGz9xLVxJEs4I5LPxxDFDcfs5AHV9 wQ1rH+CnGOlBGD2X3jjOVJb1Vp9PZPj5sG4mCyBIfJdbuC1MYkXoOfmi8kY0MkV8 mB/XAODk4GmDTPG76gxAv3Da+10vcABqMNpSwraFZwcBcGOhUnmpKxRmm2dZdz7r tTLcZaaeAYJlNH4fxoG6PdmcPidLnlT4ILX44cXAf+OL4WJgWrRUUexTpI75pW0C AwEAATANBgkqhkiG9w0BAQsFAAOBgQCB9fjVciHTD0YlckPoSTzZJXHkDaBpmBVa 9/GpVLQMA9bK03AkDllycxEbSgB0bd8RjZKd1+3T7ck2FsOOzgIZP0v5U8A0uxA7 58w2yJWmomn9DaKXqwD9HHux905znq3elKzd1M5ZSbQhZdqNmsw8wZUo2ZaPCDHW wBCd2m6Ueg== -----END CERTIFICATE----- subject=/CN=www.uy24fd6wkrzss.net issuer=/CN=www.bu5cm42gttwqzick.com --- No client certificate CA names sent Peer signing digest: SHA256 Server Temp Key: ECDH, P-256, 256 bits --- SSL handshake has read 1058 bytes and written 428 bytes --- New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-GCM-SHA384 Server public key is 2048 bit Secure Renegotiation IS supported Compression: NONE Expansion: NONE No ALPN negotiated SSL-Session: Protocol : TLSv1.2 Cipher : ECDHE-RSA-AES256-GCM-SHA384 Session-ID: Session-ID-ctx: Master-Key: BC7B6CA79A1466768EAE37C7D591FB57F2D351E75B4C43AB16C8B8CBCBEB8E4BA4EDE2FEED8D4036D045F42F3F029585 Key-Arg : None PSK identity: None PSK identity hint: None SRP username: None Start Time: 1628842910 Timeout : 300 (sec) Verify return code: 21 (unable to verify the first certificate) --- However, Tor fails to work as a relay using the NoAdvertise & NoListen options of the ORPort directive; even though, Openssl s_client is successfully CONNECTED to the Public Address. ### ORPort WITH NoAdvertise & NoListen (FAILS) ### Note: Failed Self-testing logs WITH NoAdvertise & NoListen Aug 13 01:01:46.000 [notice] Now checking whether IPv4 ORPort 198.91.60.78:443 is reachable... (this may take up to 20 minutes -- look for log messages indicating success) Aug 13 01:21:45.000 [warn] Your server has not managed to confirm reachability for its ORPort(s) at 198.91.60.78:443. Relays do not publish descriptors until their ORPort and DirPort are reachable. Please check your firewalls, ports, address, /etc/hosts file, etc. Note: Failed Self-testing torrc WITH NoAdvertise & NoListen # cat /tmp/torrc Nickname ASUSWRTMerlinRelay ORPort 198.91.60.78:443 NoListen ORPort 192.168.0.1:9001 NoAdvertise SocksPort 9050 SocksPort 192.168.0.1:9050 ControlPort 9051 ExitRelay 0 DirCache 0 MaxMemInQueues 192 MB GeoIPFile /opt/share/tor/geoip Log notice file /tmp/torlog VirtualAddrNetwork 10.192.0.0/10 AutomapHostsOnResolve 1 TransPort 192.168.0.1:9040 DNSPort 192.168.0.1:9053 RunAsDaemon 1 DataDirectory /tmp/tor/torrc.d/.tordb AvoidDiskWrites 1 User tor ContactInfo tor-operator@your-emailaddress-domain Note: Confirmed that the necessary PortForward between the Public & Private Addresses is in place # iptables -t nat -S | grep :9001 -A VSERVER -p tcp -m tcp --dport 443 -j DNAT --to-destination 192.168.0.1:9001 Note: Nyx shows Tor build the initial 5 measurement circuits, but after some time fails and only shows the outbound & control connections. # nyx nyx - 192.168.0.1 (Linux 2.6.36.4b...) Tor 0.4.5.7 (recommended) ASUSWRTMerlinRelay - 192.168.0.1:9001, Control Port (open): 9051 cpu: 10.6% tor, 3.2% nyx mem: 55 MB (22.2%) pid: 5374 uptime: 56:32 fingerprint: 02DD61E41B3739C629C5CF8CEBA6000290BC3E7B flags: Fast, Running, Valid page 2 / 5 - m: menu, p: pause, h: page help, q: quit Connections (2289 outbound, 1 control): Note: Openssl s_client is successfully CONNECTED to the Public Address # openssl s_client -connect 198.91.60.78:443 CONNECTED(00000003) depth=0 CN = www.uy24fd6wkrzss.net verify error:num=20:unable to get local issuer certificate verify return:1 depth=0 CN = www.uy24fd6wkrzss.net verify error:num=21:unable to verify the first certificate verify return:1 --- Certificate chain 0 s:/CN=www.uy24fd6wkrzss.net i:/CN=www.bu5cm42gttwqzick.com --- Server certificate -----BEGIN CERTIFICATE----- MIICQzCCAaygAwIBAgIJAOPPF6uxLfr8MA0GCSqGSIb3DQEBCwUAMCMxITAfBgNV BAMMGHd3dy5idTVjbTQyZ3R0d3F6aWNrLmNvbTAeFw0yMTAzMDEwMDAwMDBaFw0y MTA5MjUwMDAwMDBaMCAxHjAcBgNVBAMMFXd3dy51eTI0ZmQ2d2tyenNzLm5ldDCC ASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAM/1zzI/PdYXIm6p1ZshOzIf AnUfauCPovIutPWBBNi9Q6um6EWYzb7DIKhmiTwijl691ktfylwVIMT8JnGO+1t1 +SooiSp4V1oSkMvoA0Whvhh3jonblvq7cD0FGz9xLVxJEs4I5LPxxDFDcfs5AHV9 wQ1rH+CnGOlBGD2X3jjOVJb1Vp9PZPj5sG4mCyBIfJdbuC1MYkXoOfmi8kY0MkV8 mB/XAODk4GmDTPG76gxAv3Da+10vcABqMNpSwraFZwcBcGOhUnmpKxRmm2dZdz7r tTLcZaaeAYJlNH4fxoG6PdmcPidLnlT4ILX44cXAf+OL4WJgWrRUUexTpI75pW0C AwEAATANBgkqhkiG9w0BAQsFAAOBgQCB9fjVciHTD0YlckPoSTzZJXHkDaBpmBVa 9/GpVLQMA9bK03AkDllycxEbSgB0bd8RjZKd1+3T7ck2FsOOzgIZP0v5U8A0uxA7 58w2yJWmomn9DaKXqwD9HHux905znq3elKzd1M5ZSbQhZdqNmsw8wZUo2ZaPCDHW wBCd2m6Ueg== -----END CERTIFICATE----- subject=/CN=www.uy24fd6wkrzss.net issuer=/CN=www.bu5cm42gttwqzick.com --- No client certificate CA names sent Peer signing digest: SHA256 Server Temp Key: ECDH, P-256, 256 bits --- SSL handshake has read 1058 bytes and written 428 bytes --- New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-GCM-SHA384 Server public key is 2048 bit Secure Renegotiation IS supported Compression: NONE Expansion: NONE No ALPN negotiated SSL-Session: Protocol : TLSv1.2 Cipher : ECDHE-RSA-AES256-GCM-SHA384 Session-ID: Session-ID-ctx: Master-Key: BC7B6CA79A1466768EAE37C7D591FB57F2D351E75B4C43AB16C8B8CBCBEB8E4BA4EDE2FEED8D4036D045F42F3F029585 Key-Arg : None PSK identity: None PSK identity hint: None SRP username: None Start Time: 1628842910 Timeout : 300 (sec) Verify return code: 21 (unable to verify the first certificate) --- What am I missing? Am I implementing the NoAdvertise & NoListen options of the ORPort directive incorrectly? Thank you for your assistance. Respectfully, Gary

3 6

Tor non-exit relays and Hulu in 2021
by Neel Chauhan 18 Aug '21

18 Aug '21

Hi tor-relays@, Long time no see. Lately I'm more involved with the FreeBSD community, but I still run Tor relays though! I'm moving into a new house in Seattle, WA which has CenturyLink Fiber. However, I'm moving in with people who watch Hulu. I remember Hulu blocked Tor middle relay IPs back in 2016-7, but haven't seen recent information on this. Does Hulu still block Tor middle relay IPs in 2021? I'm also considering adding a static IP block but not sure if CenturyLink is willing to give static IPs to me. I signed up for a "business" account but since it's a "residential" address CL's systems may not 'allow' this [1], so that's why I'm asking. Comcast is not an option for me despite technically being "available" for obvious well-documented reasons. After all, CenturyLink is giving me 1 Gbps Fiber, not 1.5 Mbps DSL. -Neel Chauhan === FOOTNOTES === [1] - https://www.reddit.com/r/centurylink/comments/p6cs1t/cbrasstatic_ip_block_w…

1 0

prometheus onion service exporter
by Fran 16 Aug '21

16 Aug '21

Hey, I recently stumbled over a prometheus exporter for onion services: https://github.com/systemli/prometheus-onion-service-exporter Maybe this is of interest for some of you... fran

1 0

Move or Recreate
by Eddie 16 Aug '21

16 Aug '21

I'm thinking of switching a couple of the VPS servers I have, where I'm running both relays and bridges. (On separate VPSs, obviously). I know how to maintain the keys for both relays and bridges for the replacements, but was wondering exactly what does that buy me, as both will now be running at different IPv4/6 addresses. As opposed to just blowing away the current ones and starting fresh copies. Cheers.

3 2

FallbackDirectoryMirrors relay IP change
by Cristian Consonni 05 Aug '21

05 Aug '21

Hi, After 7+ years of running a relay on DigitalOcean, I have decided to move it somewhere else, as there are cheaper options. I kept the same keys and fingerprint and it seems that it has been picked up correctly on Atlas/Tor metrics, as it is showing with the new IP. I believe that this relay was listed as a fallback directory mirror - how can I check this? According to the doc[1] I should open a ticket to signal the change or write here. The link[2] for opening the ticket seems broken, so here I am. Also, I am wondering if I should have done this *before* moving the relay, if that's the case I think it could be worth putting a note in the FAQ about upgrading/moving a node[3]. Best, Cristian [1]: https://gitlab.torproject.org/legacy/trac/-/wikis/doc/FallbackDirectoryMirr… [2]: https://trac.torproject.org/projects/tor/newticket?keywords=fallback-change… [3]: https://2019.www.torproject.org/docs/faq.html.en#UpgradeOrMove

2 1

Is my node dropping packets?
by Marco Predicatori 02 Aug '21

02 Aug '21

Hi, my Tor node is inside a local network protected by a firewall. Only port 9001 is NATted towards the Tor server. Moreover, I have iptables active on the Tor server itself. The outer firewall blocks any incoming packet except for packets on port 9001 and returning packets from established connections. My iptables blocks several packets which were allowed through by the outer firewall, where I assume they are recognized as returning packets from established connections. Then my local iptables drops them. I can't understand why. You can find here an extract from my Tor node "iptables -L -n" and a typical day's log of dropped packets on the Tor node: https://easyupload.io/m/48if5l Many packets coming from other Tor nodes where dropped. The Tor log doesn't mention any problem. What may be wrong? -- Bye, Marco https://metrics.torproject.org/rs.html#details/A4E74410D83705EEFF24BC265DE2…

2 2