Emma is a lightweight censorship analyser that tests if the machine it's running on can use the Tor network. Emma does so by testing if it can
-
fetch websites such as torproject.org,
-
connect to Tor relays,
-
connect to default bridges,
-
and connect to directory authorities.
If you run emma without any arguments, it will write its analysis report to a
file. You can pass the argument -stdout to make emma write its report to
stdout.
Emma is meant to be run by semi-technical Tor users who believe that they are subject to censorship.
You need to have golang installed to compile emma. First, clone the repository by running
git clone https://gitlab.torproject.org/tpo/anti-censorship/emma.git
Then, enter your newly-cloned repository and compile the tool by running
cd emma && make
If everything worked, your emma binary will be in the bin directory.
Here's what emma's output looks like:
2020/06/22 09:26:40 Starting analysis.
Time: 2020-06-22 09:26:40.003730038 -0700 PDT m=+0.018131500
Testing default bridges:
✓ 38.229.1.78:80 74ms
✓ 38.229.33.83:80 53ms
✓ 192.95.36.142:443 73ms
✓ 37.218.240.34:40035 166ms
✓ 37.218.245.14:38224 147ms
✓ 85.31.186.98:443 167ms
✓ 85.31.186.26:443 165ms
✓ 144.217.20.138:80 72ms
✓ 193.11.166.194:27015 169ms
✓ 193.11.166.194:27020 167ms
✓ 193.11.166.194:27025 167ms
✓ 209.148.46.65:443 68ms
✓ 146.57.248.225:22 69ms
✓ 45.145.95.6:27015 155ms
✓ [2a0c:4d80:42:702::1]:27015 153ms
Testing websites:
✓ bridges.torproject.org 664ms
✓ drive.google.com 1.193s
✓ github.com 3.481s
✓ archive.org 15.114s
✓ gitlab.com 475ms
✓ accounts.google.com 130ms
✓ mail.riseup.net 219ms
✓ torproject.org 1.093s
✓ gettor.torproject.org 893ms
✓ ajax.aspnetcdn.com 550ms
Testing directory authorities:
✓ 128.31.0.39:9131 74ms
✓ [2001:858:2:2:aabb:0:563b:1526]:443 171ms
✓ 86.59.21.38:80 180ms
✓ 45.66.33.45:80 143ms
✓ 66.111.2.131:9030 106ms
✓ [2001:638:a000:4140::ffff:189]:443 163ms
✓ 131.188.40.189:80 156ms
✓ [2001:678:558:1000::244]:443 162ms
✓ 193.23.244.244:80 154ms
✓ [2001:67c:289c::9]:80 189ms
✓ 171.25.193.9:443 177ms
✓ 154.35.175.225:80 50ms
✓ 199.58.81.140:80 79ms
✓ [2620:13:4000:6000::1000:118]:443 41ms
✓ 204.13.164.118:80 35ms
Testing relays:
✓ 193.11.166.196:443 164ms
✓ 81.7.18.7:9001 162ms
✓ 91.143.80.147:995 162ms
✓ 162.247.74.7:443 93ms
✓ 62.102.148.68:443 164ms
✓ 185.220.100.253:9000 171ms
2020/06/22 09:27:08 Wrote output to: /dev/stdout
Send email to Philipp Winter [email protected].
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