- tor-relays - lists.torproject.org

Exit Node Questions
by tdukes＠palmettoshopper.com 02 Apr '22

02 Apr '22

Just a couple questions regarding exit node setup: 1) what exactly do I add to my in-addr.arpa zone file? 2) how do I implement a 'reduced exit policy'? Is that something that needs to be added to the torrc file? Thanks

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Help needed to get obfs4proxy 0.0.13-1 into Ubuntu focal-backports
by wurstsemmel 01 Apr '22

01 Apr '22

Dear Community, Dear Bridge Operators, an updated obfs4proxy package was pushed to Debian bullseye-backports about 2 weeks ago and solves a security issue and a partial incompatibility between Tor browser and bridges [1, 2, 3]. See also the E-Mail from meskio [4]. The new version, 0.0.13-1, will be available in Ubunutu jammy, planned to be released in April as 22.04 LTS. I would like to get this version into focal-backports, as focal (20.04 LTS) is a popular system. For this reason, I filed a bug with Ubuntu. https://bugs.launchpad.net/ubuntu/+source/obfs4proxy/+bug/1967003 Anyone who has experience with Ubuntu packages and backports is very welcome to help. Thank you and kind regards, wurstsemmel [1] https://lists.torproject.org/pipermail/anti-censorship-team/2022-January/00… [2] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/40804 [3] https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/obfs… [4] https://lists.torproject.org/pipermail/tor-relays/2022-March/020447.html

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Appears things are working again.
by tdukes＠palmettoshopper.com 31 Mar '22

31 Mar '22

Had been using a docker container with not much luck so I switched to using the tor files for centos 8. Working so far. I'm now in the relay search. Not sure or why its saying I'd be better suited for an exit. Fingers crossed!

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Bridge lifecycle expectations
by Just a Pleb 30 Mar '22

30 Mar '22

Hi All, I have three lifecycle questions: 1) How long is typical (or what factors are involved ) before the bridge address is given out to users. 2) How do I know when the bridge is burned (identified and blocked) 3) When it is burned and I build a new one on an other address should I copy the key with the config to maintain "trust" continuity or is that neutral or bad for bridges? As a little context I've run relays before and just started up an obfs4proxy Bridge (well 10days ago). https://bridges.torproject.org/status?id=<MY_BRIDGE_ID> says it's good, logs look good but I've yet to see any real traffic, just the same 8 German node that I presume are Tor infrastructure checking status. $ cat bridge-stats bridge-stats-end 2022-03-22 18:44:43 (86400 s) bridge-ips de=8 bridge-ip-versions v4=8,v6=0 bridge-ip-transports <OR>=8,obfs4=8 every day is the same (other than bridge-stats-end) Thanks, A. Pleb

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BadMiddle Nodes Loadbalancing Re: How to reduce tor CPU load on a single bridge?
by Jonas Friedli 26 Mar '22

26 Mar '22

Hi Gary, wait, your Relays are BadMiddle Nodes! It breaks at least all onion features. Thanks for trying to saturate the connection by balancing the single-core tor bottleneck. But think of any client try to establish RendezvousPoints or IntroductionPoints or fetch HsDir with one of your tor instances that all have same descriptor and look same to outside. It will result into fail the connection! 1. a_tor_client => HAProxy server tornode41 192.168.0.41:9001 => RendezvousCookie 46B9FA5B onionservice => HAProxy server tornode51 192.168.0.41:9001 => RendezvousCookie 46B9FA5B 2. tornode51 does not know cookies of tornode41 will: [WARN] Rejecting RENDEZVOUS1 cell with unrecognized rendezvous cookie 46B9FA5B. Didn't recognize cell, but circ stops here circuit_receive_relay_cell (forward) failed This Loadbalancing setup is only valid and usefull for Bridges or ExitNode relay roles. Not for any that have MiddlePropability consensusweigths. just FYI > David, Roger, et al., > > I just got back from holidays and really enjoyed this thread! > > I run my Loadbalanced Tor Relay as a Guard/Middle Relay, very similar to David's topology diagram, without the Snoflake-Server proxy. I'm using Nginx (which forks a child process per core) instead of HAProxy. My Backend Tor Relay Nodes are running on several, different Physical Servers; thus, I'm using Private Address Space instead of Loopback Address Space. > > In this configuration, I discovered that I had to configure Nginix/HAProxy to use Transparent Streaming Mode, use Source IP Address Sticky Sessions (Pinning), configure the Loadbalancer to send the Backend Tor Relay Nodes' traffic back to Nginx/HAProxy (Kernel & IPTables), configure all Backend Tor Relay Nodes to use a copy of the same .tordb (I wasn't able to get the Backend Tor Relay Nodes working with the same .tordb (over NFS) without the DirectoryAuthorities complaining), and configure the Backend Tor Relay Nodes to use the same DirectoryAuthority (to ensure each Backend Tor Relay Node sends Meta-Data to the same DirectoryAuthority). Moreover, I've enabled logging to a central Syslog Server for each Backend Tor Relay Node and created a number of Shell Scripts to help remotely manage each Backend Tor Relay Node. > > Here are some sample configurations for reference. > > Nginx Config: > > upstream orport_tornodes { > #least_conn; > hash $remote_addr consistent; > #server 192.168.0.1:9001 weight=1 max_fails=1 fail_timeout=10s; > #server 192.168.0.1:9001 down; > server 192.168.0.11:9001 weight=4 max_fails=0 fail_timeout=0s; > server 192.168.0.21:9001 weight=4 max_fails=0 fail_timeout=0s; > #server 192.168.0.31:9001 weight=4 max_fails=3 fail_timeout=300s; > server 192.168.0.41:9001 weight=4 max_fails=0 fail_timeout=0s; > server 192.168.0.51:9001 weight=4 max_fails=0 fail_timeout=0s; > #zone orport_torfarm 64k; > > > HAProxy Config (Alternate): > > frontend tornodes > # Log to global config > log global > > # Bind to port 443 on a specified interface > bind 0.0.0.0:9001 transparent > > # We're proxying TCP here... > mode tcp > > default_backend orport_tornodes > > # Simple TCP source consistent over several servers using the specified > # source 0.0.0.0 usesrc clientip > backend orport_tornodes > > balance source > hash-type consistent > #server tornode1 192.168.0.1:9001 check disabled > #server tornode11 192.168.0.11:9001 source 192.168.0.1 > server tornode11 192.168.0.11:9001 source 0.0.0.0 usesrc clientip check disabled > server tornode21 192.168.0.21:9001 source 0.0.0.0 usesrc clientip check disabled > #server tornode31 192.168.0.31:9001 source 0.0.0.0 usesrc clientip check disabled > server tornode41 192.168.0.41:9001 source 0.0.0.0 usesrc clientip check disabled > server tornode51 192.168.0.51:9001 source 0.0.0.0 usesrc clientip check disabled > > > Linux Kernel & IPTables Config: > > modprobe xt_socket > modprobe xt_TPROXY > > echo 1 > /proc/sys/net/ipv4/ip_forward; cat /proc/sys/net/ipv4/ip_forward > echo 1 > /proc/sys/net/ipv4/ip_nonlocal_bind; cat /proc/sys/net/ipv4/ip_nonlocal_bind > echo 15000 64000 > /proc/sys/net/ipv4/ip_local_port_range; cat /proc/sys/net/ipv4/ip_local_port_range > > ip rule del fwmark 1 lookup 100 2>/dev/null # Ensure Duplicate Rule is not Created > ip rule add fwmark 1 lookup 100 # ip rule show > ip route add local 0.0.0.0/0 dev lo table 100 # ip route show table wan0; ip route show table 100 > > iptables -I INPUT -p tcp --dport 9001 -j ACCEPT > iptables -t mangle -N TOR > iptables -t mangle -A PREROUTING -p tcp -m socket -j TOR > iptables -t mangle -A TOR -j MARK --set-mark 1 > iptables -t mangle -A TOR -j ACCEPT > #iptables -t mangle -A PREROUTING -p tcp -s 192.168.0.0/24 --sport 9001 -j MARK --set-xmark 0x1/0xffffffff > #iptables -t mangle -A PREROUTING -p tcp --dport 9001 -j TPROXY --tproxy-mark 0x1/0x1 --on-port 9001 --on-ip 127.0.0.1 > > > Backend Tor Relay Node Configs: > > # cat /tmp/torrc > Nickname xxxxxxxxxxxxxxxxxx > ORPort xxx.xxx.xxx.xxx:9001 NoListen > ORPort 192.168.0.11:9001 NoAdvertise > SocksPort 9050 > SocksPort 192.168.0.11:9050 > ControlPort 9051 > DirAuthority longclaw orport=443 no-v2 v3ident=23D15D965BC35114467363C165C4F724B64B4F66 199.58.81.140:80 74A910646BCEEFBCD2E874FC1DC997430F968145 > FallbackDir 193.23.244.244:80 orport=443 id=7BE683E65D48141321C5ED92F075C55364AC7123 > DirCache 0 > ExitRelay 0 > MaxMemInQueues 192 MB > GeoIPFile /opt/share/tor/geoip > Log notice file /tmp/torlog > Log notice syslog > VirtualAddrNetwork 10.192.0.0/10 > AutomapHostsOnResolve 1 > TransPort 192.168.0.11:9040 > DNSPort 192.168.0.11:9053 > RunAsDaemon 1 > DataDirectory /tmp/tor/torrc.d/.tordb > AvoidDiskWrites 1 > User tor > ContactInfo tor-operator at your-emailaddress-domain > > # cat /tmp/torrc > Nickname xxxxxxxxxxxxxxxxxx > ORPort xxx.xxx.xxx.xxx:9001 NoListen > ORPort 192.168.0.41:9001 NoAdvertise > SocksPort 9050 > SocksPort 192.168.0.41:9050 > ControlPort 9051 > DirAuthority longclaw orport=443 no-v2 v3ident=23D15D965BC35114467363C165C4F724B64B4F66 199.58.81.140:80 74A910646BCEEFBCD2E874FC1DC997430F968145 > FallbackDir 193.23.244.244:80 orport=443 id=7BE683E65D48141321C5ED92F075C55364AC7123 > DirCache 0 > ExitRelay 0 > MaxMemInQueues 192 MB > GeoIPFile /opt/share/tor/geoip > Log notice file /tmp/torlog > Log notice syslog > VirtualAddrNetwork 10.192.0.0/10 > AutomapHostsOnResolve 1 > TransPort 192.168.0.41:9040 > DNSPort 192.168.0.41:9053 > RunAsDaemon 1 > DataDirectory /tmp/tor/torrc.d/.tordb > AvoidDiskWrites 1 > User tor > ContactInfo tor-operator at your-emailaddress-domain > > > Shell Scripts to Remotely Manage Tor Relay Nodes: > > # cat /usr/sbin/stat-tor-nodes > #!/bin/sh > uptime-all-nodes; memfree-all-nodes; netstat-tor-nodes > > # cat /usr/sbin/uptime-all-nodes > #!/bin/sh > /usr/bin/ssh -t admin at 192.168.0.11 'hostname; uptime' > /usr/bin/ssh -t admin at 192.168.0.21 'hostname; uptime' > /usr/bin/ssh -t admin at 192.168.0.31 'hostname; uptime' > /usr/bin/ssh -t admin at 192.168.0.41 'hostname; uptime' > /usr/bin/ssh -t admin at 192.168.0.51 'hostname; uptime' > > # cat /usr/sbin/memfree-all-nodes > #!/bin/sh > /usr/bin/ssh -t admin at 192.168.0.11 'hostname; grep MemFree /proc/meminfo' > /usr/bin/ssh -t admin at 192.168.0.21 'hostname; grep MemFree /proc/meminfo' > /usr/bin/ssh -t admin at 192.168.0.31 'hostname; grep MemFree /proc/meminfo' > /usr/bin/ssh -t admin at 192.168.0.41 'hostname; grep MemFree /proc/meminfo' > /usr/bin/ssh -t admin at 192.168.0.51 'hostname; grep MemFree /proc/meminfo' > > # cat /usr/sbin/netstat-tor-nodes > #!/bin/sh > /usr/bin/ssh -t admin at 192.168.0.11 'hostname; netstat -anp | grep -i tor | grep -v 192.168.0.1: | wc -l' > /usr/bin/ssh -t admin at 192.168.0.21 'hostname; netstat -anp | grep -i tor | grep -v 192.168.0.1: | wc -l' > /usr/bin/ssh -t admin at 192.168.0.31 'hostname; netstat -anp | grep -i tor | grep -v 192.168.0.1: | wc -l' > /usr/bin/ssh -t admin at 192.168.0.41 'hostname; netstat -anp | grep -i tor | grep -v 192.168.0.1: | wc -l' > /usr/bin/ssh -t admin at 192.168.0.51 'hostname; netstat -anp | grep -i tor | grep -v 192.168.0.1: | wc -l' > > # cat /jffs/sbin/ps-tor-nodes > #!/bin/sh > /usr/bin/ssh -t admin at 192.168.0.11 'hostname; ps w | grep -i tor' > /usr/bin/ssh -t admin at 192.168.0.21 'hostname; ps w | grep -i tor' > /usr/bin/ssh -t admin at 192.168.0.31 'hostname; ps w | grep -i tor' > /usr/bin/ssh -t admin at 192.168.0.41 'hostname; ps w | grep -i tor' > /usr/bin/ssh -t admin at 192.168.0.51 'hostname; ps w | grep -i tor' > > # cat /usr/sbin/killall-tor-nodes > #!/bin/sh > read -r -p "Are you sure? [y/N] " input > case "$input" in > [yY]) > /usr/bin/ssh -t admin at 192.168.0.11 'killall tor' > /usr/bin/ssh -t admin at 192.168.0.21 'killall tor' > #/usr/bin/ssh -t admin at 192.168.0.31 'killall tor' > /usr/bin/ssh -t admin at 192.168.0.41 'killall tor' > /usr/bin/ssh -t admin at 192.168.0.51 'killall tor' > return 0 > ;; > *) > return 1 > ;; > esac > > # cat /usr/sbin/restart-tor-nodes > #!/bin/sh > read -r -p "Are you sure? [y/N] " input > case "$input" in > [yY]) > /usr/bin/ssh -t admin at 192.168.0.11 '/usr/sbin/tor -f /tmp/torrc --quiet' > /usr/bin/ssh -t admin at 192.168.0.21 '/usr/sbin/tor -f /tmp/torrc --quiet' > #/usr/bin/ssh -t admin at 192.168.0.31 '/usr/sbin/tor -f /tmp/torrc --quiet' > /usr/bin/ssh -t admin at 192.168.0.41 '/usr/sbin/tor -f /tmp/torrc --quiet' > /usr/bin/ssh -t admin at 192.168.0.51 '/usr/sbin/tor -f /tmp/torrc --quiet' > return 0 > ;; > *) > return 1 > ;; > esac > > I've been meaning to put together a tutorial on Loadbalancing Tor Relays, but haven't found the time as of yet. Perhaps, this will help, until I am able to find the time. > > I appreciate your knowledge sharing and for furthering the topic of Loadbalancing Tor Relays; especially, with regard to Bridging and Exit Relays. > > Keep up the Great Work! > > Respectfully, > > > Gary > On Tuesday, January 4, 2022, 09:57:52 PM MST, Roger Dingledine <arma at torproject.org> wrote: > > [I'm about to go off-line for some days, so I am sending my current > suboptimally-organized reply, which I hope is better than waiting another > week to respond :)] > > On Thu, Dec 30, 2021 at 10:42:51PM -0700, David Fifield wrote: > > Let's make a distinction between the "frontend" snowflake-server > > pluggable transport process, and the "backend" tor process. These don't > > necessarily have to be 1:1; either one could be run in multiple > > instances. Currently, the "backend" tor is the limiting factor, because > > it uses only 1 CPU core. The "frontend" snowflake-server can scale to > > multiple cores in a single process and is comparatively unrestrained. > > Excellent point, and yes this simplifies. Great. > > > I believe that the "pinning" of a client session to particular tor > > instance will work automatically by the fact that snowflake-server keeps > > an outgoing connection alive (i.e., through the load balancer) as long > > as a KCP session exists. > >[...] > > But before starting the second instance the first time, copy keys from > > the first instance: > > Hm. It looks promising! But we might still have a Tor-side problem > remaining. I think it boils down to how long the KCP sessions last. > > The details on how exactly these bridge instances will diverge over time: > > The keys directory will start out the same, but after four weeks > (DEFAULT_ONION_KEY_LIFETIME_DAYS, used to be one week but in Tor > 0.3.1.1-alpha, proposal 274, we bumped it up to four weeks) each > bridge will rotate its onion key (the one clients use for circuit-level > crypto). That is, each instance will generate its own fresh onion key. > > The two bridge instances actually haven't diverged completely at that > point, since Tor remembers the previous onion key (i.e. the onion key > from the previous period) and is willing to receive create cells that > use it for one further week (DEFAULT_ONION_KEY_GRACE_PERIOD_DAYS). So it > is after 5 weeks that the original (shared) onion key will no longer work. > > Where this matters is (after this 5 weeks have passed) if the client > connects to the bridge, fetches and caches the bridge descriptor of > instance A, and then later it connects to the bridge again and gets > passed to instance B. In this case, the create cell that the client > generates will use the onion key for instance A, and instance B won't > know how to decrypt it so it will send a destroy cell back. > > If this is an issue, we can definitely work around it, by e.g. disabling > the onion key rotation on the bridges, or setting up a periodic rsync+hup > between the bridges, or teaching clients to use createfast cells in this > situation (this type of circuit crypto doesn't use the onion key at all, > and just relies on TLS for security -- which can only be done for the > first hop of the circuit but that's the one we're talking about here). > > But before we think about workarounds, maybe we don't need one: how long > does "the KCP session" last? > > Tor clients try to fetch a fresh bridge descriptor every three-ish > hours, and once they fetch a bridge descriptor from their "current" > bridge instance, they should know the onion key that it wants to use. So > it is that up-to-three-hour window where I think things could go wrong. > And that timeframe sounds promising. > > (I also want to double-check that clients don't try to use the onion > key from the current cached descriptor while fetching the updated > descriptor. That could become an ugly bug in the wrong circumstances, > and would be something we want to fix if it's happening.) > > Here's how you can simulate a pair of bridge instances that have diverged > after five weeks, so you can test how things would work with them: > > Copy the keys directory as before, but "rm secret_onion_key*" in the > keys directory on n-1 of the instances, before starting them.) > > Thanks! > --Roger >

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Bridges not being distributed
by Spydar007 25 Mar '22

25 Mar '22

Hello, I notice (almost) all bridges are showing their distributor mechanism as None on Tor Metrics.[1] There are also hardly any in the latest pool assignments file from CollecTor.[2] Curious as to why? Is this a change that needs fixing on a bridge operators end, or simply BridgeDB not reporting properly? [1] https://metrics.torproject.org/rs.html#search/type:bridge%20 [2] https://metrics.torproject.org/collector/recent/bridge-pool-assignments/

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update obfs4proxy if you run a bridge
by meskio 23 Mar '22

23 Mar '22

Hello, TL;RD: if you are a bridge operator please update obfs4proxy to a version>=0.0.12. There is a new version of obfs4proxy (>=0.0.12) which fixes a security issue[0]. Tor Browser has already updated to the new version, which reduces a bit the security problem, but introduces a partial incompatibility between versions[1]. Because of that updating to the latest version greatly will help bridge users. If you use debian you can find the latest version bullseye-backports[2]. If you use docker there is a new version of the official docker image that you can upgrade to[3]. Thank you for running bridges, let me know if you need any help upgrading it. [0] https://lists.torproject.org/pipermail/anti-censorship-team/2022-January/00… [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/40804 [2] https://packages.debian.org/stable-backports/obfs4proxy [3] https://hub.docker.com/layers/thetorproject/obfs4-bridge/0.11/images/sha256… -- meskio | https://meskio.net/ -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- My contact info: https://meskio.net/crypto.txt -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Nos vamos a Croatan.

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Re: [tor-relays] Bridge lifecycle expectations
by Just a Pleb 23 Mar '22

23 Mar '22

Hi meskio, Thanks for the detailed response. My bridge has been assigned to telegram so that explains why it's not active yet. Watching per country stats makes sense for determining where the bridge has been blocked. Also good to know the bridge state should be fully disposed when recycling rather than preserved for reputational purposes. Follow up question on running bridges and relays. If the consensus is I should pick Relays xor Bridges to run I will but I'm not fully convinced that's the right trade off for capacity -vs- security given "good actors" wouldn't attack the traffic and bad actors wouldn't obey the injunction the only extra security impact I see is limiting damage from "good actor who get compromised" which is *some* obviously... Thanks

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Ports blocked
by tdukes＠palmettoshopper.com 23 Mar '22

23 Mar '22

Looks like my ISP has shut me down. The ports I were using are now blocked. I checked them with an online port checker. I tried.

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Snowflake vs bridge on home connection on a Raspberry Pi 4
by Cristian Consonni 22 Mar '22

22 Mar '22

Hi all, I have a fiber connection at home and I would like to run a bridge or standalone Snowflake proxy on a dedicated Raspberry Pi 4. I have been reading some threads [1][2] from this list about the topic, but it is not completely clear to me what would be the best choice. The requirements [3] for running a bridge are 24/7 connectivity and the ability to expose TCP ports; however, I have read that it is also preferred that you have a static IP to run a bridge (in the page about the recent campaign about bridges, having a static IP was listed as a requirement [4]). In principle my home connection has a dynamic IP, but I have been logging my IP address for the last few days and it seems quite stable (it has not changed for the last 4 days). What's the best choice? Can I run both? Best, Cristian [1]: https://lists.torproject.org/pipermail/tor-relays/2022-February/020298.html [2]: https://lists.torproject.org/pipermail/tor-relays/2022-February/020355.html [3]: https://community.torproject.org/relay/setup/bridge/ [4]: https://blog.torproject.org/run-a-bridge-campaign/

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Newbie needs help
by tdukes＠palmettoshopper.com 22 Mar '22

22 Mar '22

Hi, Thanks for adding me to the list. I setup a Tor Relay in Docker using this image: https://hub.docker.com/r/doudou34/tor-server Its running, so how can I test it? When I try to access it using port 9001, I'm unable to connect. I have opened the port on my firewall to the public. Haven't done it on my router yet but I have Portainer running in Docker and have no problem accessing it. Not a lot of instructions that I can find. I can post the torrc file but it's the same as the one on the docker page. ### /etc/torrc ### # see /etc/torrc/torrc.default and https://www.torproject.org/docs/tor-manual.html.en # Server's public IP Address (usually automatic) #Address 10.10.10.10 # Port to advertise for incoming Tor connections. # common ports are 9001, 443 ORPort 9001 # Mirror directory information for others (optional) # common ports are 9030, 80 #DirPort 9030 # Run as a relay only (not as an exit node) ExitPolicy reject *:* # no exits allowed # Set limits #RelayBandwidthRate 1024 KB # Throttle traffic to #RelayBandwidthBurst 2048 KB # But allow bursts up to #MaxMemInQueues 512 MB # Limit Memory usage to # Run Tor as obfuscated bridge #ServerTransportPlugin obfs3 exec /usr/bin/obfsproxy managed #ServerTransportListenAddr obfs3 0.0.0.0:54444 #BridgeRelay 1 # Run Tor only as a server (no local applications) SocksPort 0 # Run Tor as a regular user (do not change this) User debian-tor DataDirectory /var/lib/tor # If no Nickname or ContactInfo is set, docker-entrypoint will use # the environment variables to add Nickname/ContactInfo here #Nickname Tor4 # only use letters and numbers #ContactInfo email(a)example.org I've only been using docker for a few days, so maybe its an issue there. TIA

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Bridge on two port
by binarynoise 21 Mar '22

21 Mar '22

Hello everyone, I currently run a bridge on port 8080. As I don't have a webserver running, I thought I'd also publish that bridge on port 443. For relays there is that "ORPort 443 NoListen"-Option. What is the equivalent for ServerTransportListenAddr? Is ServerTransportListenAddr obfs4 0.0.0.0:443 NoListen the right way? Is this possible at all? Does make running a bridge on two ports make sense at all? Greetings binarynoise

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Tor 0.3.5.x is unsupported, please upgrade
by Georg Koppen 21 Mar '22

21 Mar '22

Hello! It's time again to get relays upgraded running an EOL Tor series (0.3.5.x). We'll start reaching out to operators with valid contact information this week and plan to start reject relays which are still on 0.3.5.x about 4 weeks from now on at the begin of March. You can follow along that process in our bug tracker[1] if you want. For the general processes around dealing with EOL relays in the Tor network see my mail from last October[2]. Feedback and improvements are welcome, as always. Georg [1] https://gitlab.torproject.org/tpo/network-health/team/-/issues/171 [2] https://lists.torproject.org/pipermail/tor-relays/2021-October/019862.html

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Connection burst
by Felix 21 Mar '22

21 Mar '22

Hi everybody Just to let you know. Yesterday between 21:26 and 21:31 utc the relay 03C3069E814E296EB18776EB61B1ECB754ED89FE (Tor 0.4.7.4-alpha, LibreSSL 3.4.2) received a connection burst of 2k+ source addresses out of 174 /8 ip4 nets (1-223/8). They were kicked off by the packetfilter because the max conn per ip rate was above my applied max threshold. The notice level DoS mitigation entry remained untouched while sitting behind the pf. Beautiful! -- Cheers Felix

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Which is the most useful: relay or bridge
by Thoughts 19 Mar '22

19 Mar '22

Currently running both a guard relay and a bridge, one each on two different systems, but both behind the same firewall and static IP. Curious if this is a good idea, or if one or the other is of much greater value. Seeing about 2200 inbound, 2800 outbound connections on my relay per nyx, with an observed speed of 5 MB/s (only a few days into the guard ramp-up phase) Seeing about 20 connected clients on the bridge, which is advertising 2.2 MiB/s per the metrics page. R/W rates around around 150k per that same page, about 1/4th of the average on the guard relay. Thoughts?

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What is the current method of submitting Tor-friendly ISPs for consideration?
by Isaac Grover, Aileron I.T. 18 Mar '22

18 Mar '22

Good afternoon from Wisconsin, Following up on a previous post to this list, I started contacting AS administrators in bulk and currently have five ISPs in unique ASs who state they can accommodate Tor exit nodes. The GoodBadISPs page on TP.o doesn't have a submission form or contact email address where I can submit the relevant info. Should I post them here or is there a better/preferred method? Thank you in advance, Isaac Grover

2 1

Possible compression bomb
by Tschador 18 Mar '22

18 Mar '22

Hi, today I found this message in my Tor relay log: Mar 17 14:26:17.000 [warn] Possible compression bomb; abandoning stream. Mar 17 14:26:17.000 [warn] Unable to decompress HTTP body (tried Zstandard compressed, on Directory connection (client reading) with 86.59.21.38:80). What does it mean? Regards

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Re: [tor-relays] Auto-discovered IPv6 address [...] has not been found reachable.
by Onion Operator 14 Mar '22

14 Mar '22

> Fran wrote: > Hej, Hello, > > TLS handshake succeeds for me from my laptop: > > $ curl --insecure https://[2a02:a446:5ef1:1:d072:53ff:fef4:ea59] -v > * Trying 2a02:a446:5ef1:1:d072:53ff:fef4:ea59:443... > * Connected to 2a02:a446:5ef1:1:d072:53ff:fef4:ea59 > (2a02:a446:5ef1:1:d072:53ff:fef4:ea59) port 443 (#0) > * ALPN, offering h2 > * ALPN, offering http/1.1 > * TLSv1.3 (OUT), TLS handshake, Client hello (1): > * TLSv1.3 (IN), TLS handshake, Server hello (2): > * TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1): > * TLSv1.3 (OUT), TLS handshake, Client hello (1): > * TLSv1.3 (IN), TLS handshake, Server hello (2): > * TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8): > * TLSv1.3 (IN), TLS handshake, Certificate (11): > * TLSv1.3 (IN), TLS handshake, CERT verify (15): > * TLSv1.3 (IN), TLS handshake, Finished (20): > * TLSv1.3 (OUT), TLS handshake, Finished (20): > * SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384 > * ALPN, server did not agree to a protocol > * Server certificate: > * subject: CN=www.s5uu2cs3ui4yok4.net > * start date: Nov 2 00:00:00 2021 GMT > * expire date: Apr 16 00:00:00 2022 GMT > * issuer: CN=www.yi5r3anmk2gd3fbqrw4.com > * SSL certificate verify result: unable to get local issuer certificate (20), > continuing anyway. >> GET / HTTP/1.1 >> Host: [2a02:a446:5ef1:1:d072:53ff:fef4:ea59] >> User-Agent: curl/7.82.0 >> Accept: */* >> > * TLSv1.3 (IN), TLS handshake, Newsession Ticket (4): > * TLSv1.3 (IN), TLS handshake, Newsession Ticket (4): > * old SSL session ID is stale, removing > ^C > > What if you configure the IPv6 address by hand in torrc? for months my torrc had ORPort 443 IPv4Only ORPort [2a02:a446:5ef1:1:d072:53ff:fef4:ea59]:443 IPv6Only Address XXX and read in the logs: Unable to find IPv6 address for ORPort 443. You might want to specify IPv4Only to it or set an explicit address or set Address. (XXX had only the A record) > > Can you please send your torrc and the output of --- cut here --- ContactInfo flev @ kpnmail . nl Nickname RealityLeighWinner ExitPolicy reject *:* ExitPolicy reject6 *:* AvoidDiskWrites 1 DirPort 80 ORPort 443 Address XXX --- cut here --- where XXX is a DNS entry with both A and AAAA records. > > ip route show table all default via 192.168.2.254 dev eth0 192.168.2.0/24 dev eth0 proto kernel scope link src 192.168.2.102 broadcast 127.0.0.0 dev lo table local proto kernel scope link src 127.0.0.1 local 127.0.0.0/8 dev lo table local proto kernel scope host src 127.0.0.1 local 127.0.0.1 dev lo table local proto kernel scope host src 127.0.0.1 broadcast 127.255.255.255 dev lo table local proto kernel scope link src 127.0.0.1 broadcast 192.168.2.0 dev eth0 table local proto kernel scope link src 192.168.2.102 local 192.168.2.102 dev eth0 table local proto kernel scope host src 192.168.2.102 broadcast 192.168.2.255 dev eth0 table local proto kernel scope link src 192.168.2.102 ::1 dev lo proto kernel metric 256 pref medium 2a02:a446:5ef1:1::/64 dev eth0 proto kernel metric 256 expires 257593sec pref medium fe80::/64 dev eth0 proto kernel metric 256 pref medium default via fe80::7e39:53ff:fef6:d2cc dev eth0 proto ra metric 1024 expires 1464sec hoplimit 64 pref medium local ::1 dev lo table local proto kernel metric 0 pref medium local 2a02:a446:5ef1:1:d072:53ff:fef4:ea59 dev eth0 table local proto kernel metric 0 pref medium local fe80::d072:53ff:fef4:ea59 dev eth0 table local proto kernel metric 0 pref medium multicast ff00::/8 dev eth0 table local proto kernel metric 256 pref medium > ip address show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether d2:72:53:f4:ea:59 brd ff:ff:ff:ff:ff:ff permaddr 00:1e:06:42:f9:14 inet 192.168.2.102/24 brd 192.168.2.255 scope global eth0 valid_lft forever preferred_lft forever inet6 2a02:a446:5ef1:1:d072:53ff:fef4:ea59/64 scope global dynamic mngtmpaddr valid_lft 257524sec preferred_lft 171124sec inet6 fe80::d072:53ff:fef4:ea59/64 scope link valid_lft forever preferred_lft forever BTW, it's also silly that the DirPort seems not effective. I can reach it from outside but don't get it in the descriptor. This the output of ss -plt: LISTEN 0 4096 0.0.0.0:80 0.0.0.0:* users:(("tor",pid=992,fd=9)) LISTEN 0 4096 127.0.0.1:9050 0.0.0.0:* users:(("tor",pid=992,fd=6)) LISTEN 0 4096 0.0.0.0:443 0.0.0.0:* users:(("tor",pid=992,fd=7)) LISTEN 0 4096 [::]:443 [::]:* users:(("tor",pid=992,fd=8)) > > tnx & ciao, > fran thanks Oo.

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Moving Bridges
by Eddie 12 Mar '22

12 Mar '22

One of my bridges has just taken on a slew of new connections. Over the last few days it's gone from an average of around 15 users to over 300 (according to tor metrics. The logs show over 1,000 unique clients for the same period). Unfortunately with the VPS provider I'm using, this isn't sustainable as I'll probably blow my bandwidth allowance in a matter of days and the excess charges are crazy. So I'm looking to move both my bridges to a new VPS, which unfortunately is probably going to p!ss off the 300 plus folks who have just found my bridge only for it to promptly disappear, as I'm certain that there's no way to "move" them to the new location and have a couple of questions. I'm guessing that the only advantage in copying over the keys directory is that the historical statistics will remain. Is there any reason to copy over the pt_state directory, to retain the same bridgeline information. Cheers.

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Flooding of unbound via resolve attempts
by Georg Koppen 11 Mar '22

11 Mar '22

Hello! As you might know we are doing regular (at the moment weekly) scans of exit nodes to find and help with misconfigurations or errors that have potentially serious effects for Tor network usability and performance. The results we got so far after over a year of scanning are roughly single digit numbers of exit relays per week having mostly DNS configuration issues (unbound crashed etc.) However, this week we suddenly found almost 80 exit relays with malfunctioning DNS resolution[1] which was surprising. Additionally, after some of the servers got fixed the issue returned. DrWhax (thanks!) pointed us to a possible explanation twittered by the unredacted folks: https://twitter.com/unredacted_org/status/1501458345219215363 It seems that someone (intentionally or not) is overwhelming unbound leading to DNS resolution issues for those exit operators that do run this local resolver, which we currently recommend. We've opened a ticket[2] for further investigation, but I hope this email raises some awareness so that exit operators can keep and eye on the situation. Feel free to add insights you have to the ticket. Additionally, I bet if someone would share how they do monitoring for such a problem on their exits then a lot of exit operators would be happily picking up that setup and the Tor network would win. :) Thanks, Georg [1] https://gitlab.torproject.org/tpo/network-health/team/-/issues/197 [2] https://gitlab.torproject.org/tpo/network-health/analysis/-/issues/30

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Auto-discovered IPv6 address [...] has not been found reachable.
by Onion Operator 11 Mar '22

11 Mar '22

Hi Need another couple of eye balls on my relay, RealityLeighWinner. I keep reading "Auto-discovered IPv6 address [2a02:a446:5ef1:1:d072:53ff:fef4:ea59]:443 has not been found reachable..." in the logs but I actually can reach it with openssl s_client from another ipv6 box not in the same network. Could please anybody double check and maybe explain this behavior? Thanks. Oo.

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Ansible role to deploy Bridges
by Erasme - Relay Operator 09 Mar '22

09 Mar '22

Hi all, In the effort of deploying obfs4 bridges for the community we are sharing our Ansible role that allowed us to deploy multiple nodes: https://github.com/NewNewYorkBridges/ansible-tor-bridge For now it is only available on Debian but we will make it available for other distributions. We hope this role is helpful for the community. Feel free to send us your feedback! Kind regards, Erasme

3 2

Relay Finger Print Mismatch Error
by Peligro 08 Mar '22

08 Mar '22

Hello Everyone, I started running a relay, recently and it got up for 3 days became middle node and suddenly stopped. I am not sure what was happened, In logs i found that finger print mismatch error. so i tried to find is there any related post or blog but i couldn't found any, please help me on this to get back relay community. Very Happy using tor, want contribute to community Thanks Peligro

3 2

Good hosting providers for an exit node
by Charles Bevitt 07 Mar '22

07 Mar '22

I run a middle relay at home but now I’m planning to also lease a VPS to run an exit node. I’d appreciate any suggestions for a good hosting provider. My first choice would have been BUYVM, but it seems they’re always out of stock. This will be my first time working with a VPS and Linux, so wish me luck! Chuck Bevitt Sent from my iPad

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FreeBSD DNS/tor version question
by George 07 Mar '22

07 Mar '22

At Saturday's relay ops events, someone had issues with a FreeBSD relay. I believe the issues were related to DNS and the tor version. Please feel free to raise those questions here, or on IRC at #tor-relays. g

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