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Re: [tor-relays] exit operators: overall DNS failure rate above 5% - please check your DNS resolver

Moin

I just played a bit with the sources of this test system.

At first I didn't get it work, but then I changed the hard coded guard
to one of my own and voila ..


I picked an exit with an error rate of 100%:
0FF233C8D78A17B8DB7C8257D2E05CD5AA7C6B88

.. the test resultet in many many "SUCCEEDED".



--- %< ---
1/10: 1/1 $D6D6B6614C9EF2DAD13AC0C94487AD8ED3B6877F : [('SUCCEEDED', '2019-07-05 23:29:41.927196', 0.5837132930755615)]
2/10: 1/1 $D6D6B6614C9EF2DAD13AC0C94487AD8ED3B6877F : [('SUCCEEDED', '2019-07-05 23:29:41.927196', 0.5837132930755615), ('SUCCEEDED', '2019-07-05 23:29:42.613310', 0.4149782657623291)]
3/10: 1/1 $D6D6B6614C9EF2DAD13AC0C94487AD8ED3B6877F : [('SUCCEEDED', '2019-07-05 23:29:41.927196', 0.5837132930755615), ('SUCCEEDED', '2019-07-05 23:29:42.613310', 0.4149782657623291), ('SUCCEEDED', '2019-07-05 23:29:43.313887', 0.40435171127319336)]
4/10: 1/1 $D6D6B6614C9EF2DAD13AC0C94487AD8ED3B6877F : [('SUCCEEDED', '2019-07-05 23:29:41.927196', 0.5837132930755615), ('SUCCEEDED', '2019-07-05 23:29:42.613310', 0.4149782657623291), ('SUCCEEDED', '2019-07-05 23:29:43.313887', 0.40435171127319336), ('SUCCEEDED', '2019-07-05 23:29:43.914470', 0.3811912536621094)]
5/10: 1/1 $D6D6B6614C9EF2DAD13AC0C94487AD8ED3B6877F : [('SUCCEEDED', '2019-07-05 23:29:41.927196', 0.5837132930755615), ('SUCCEEDED', '2019-07-05 23:29:42.613310', 0.4149782657623291), ('SUCCEEDED', '2019-07-05 23:29:43.313887', 0.40435171127319336), ('SUCCEEDED', '2019-07-05 23:29:43.914470', 0.3811912536621094), ('SUCCEEDED', '2019-07-05 23:29:44.609796', 0.5054607391357422)]
6/10: 1/1 $D6D6B6614C9EF2DAD13AC0C94487AD8ED3B6877F : [('SUCCEEDED', '2019-07-05 23:29:41.927196', 0.5837132930755615), ('SUCCEEDED', '2019-07-05 23:29:42.613310', 0.4149782657623291), ('SUCCEEDED', '2019-07-05 23:29:43.313887', 0.40435171127319336), ('SUCCEEDED', '2019-07-05 23:29:43.914470', 0.3811912536621094), ('SUCCEEDED', '2019-07-05 23:29:44.609796', 0.5054607391357422), ('SUCCEEDED', '2019-07-05 23:29:45.690206', 0.7719564437866211)]
7/10: 1/1 $D6D6B6614C9EF2DAD13AC0C94487AD8ED3B6877F : [('SUCCEEDED', '2019-07-05 23:29:41.927196', 0.5837132930755615), ('SUCCEEDED', '2019-07-05 23:29:42.613310', 0.4149782657623291), ('SUCCEEDED', '2019-07-05 23:29:43.313887', 0.40435171127319336), ('SUCCEEDED', '2019-07-05 23:29:43.914470', 0.3811912536621094), ('SUCCEEDED', '2019-07-05 23:29:44.609796', 0.5054607391357422), ('SUCCEEDED', '2019-07-05 23:29:45.690206', 0.7719564437866211), ('SUCCEEDED', '2019-07-05 23:29:46.263253', 0.4417731761932373)]
8/10: 1/1 $D6D6B6614C9EF2DAD13AC0C94487AD8ED3B6877F : [('SUCCEEDED', '2019-07-05 23:29:41.927196', 0.5837132930755615), ('SUCCEEDED', '2019-07-05 23:29:42.613310', 0.4149782657623291), ('SUCCEEDED', '2019-07-05 23:29:43.313887', 0.40435171127319336), ('SUCCEEDED', '2019-07-05 23:29:43.914470', 0.3811912536621094), ('SUCCEEDED', '2019-07-05 23:29:44.609796', 0.5054607391357422), ('SUCCEEDED', '2019-07-05 23:29:45.690206', 0.7719564437866211), ('SUCCEEDED', '2019-07-05 23:29:46.263253', 0.4417731761932373), ('SUCCEEDED', '2019-07-05 23:29:47.031197', 0.5484879016876221)]
9/10: 1/1 $D6D6B6614C9EF2DAD13AC0C94487AD8ED3B6877F : [('SUCCEEDED', '2019-07-05 23:29:41.927196', 0.5837132930755615), ('SUCCEEDED', '2019-07-05 23:29:42.613310', 0.4149782657623291), ('SUCCEEDED', '2019-07-05 23:29:43.313887', 0.40435171127319336), ('SUCCEEDED', '2019-07-05 23:29:43.914470', 0.3811912536621094), ('SUCCEEDED', '2019-07-05 23:29:44.609796', 0.5054607391357422), ('SUCCEEDED', '2019-07-05 23:29:45.690206', 0.7719564437866211), ('SUCCEEDED', '2019-07-05 23:29:46.263253', 0.4417731761932373), ('SUCCEEDED', '2019-07-05 23:29:47.031197', 0.5484879016876221), ('SUCCEEDED', '2019-07-05 23:29:47.718230', 0.4196751117706299)]
10/10: 1/1 $D6D6B6614C9EF2DAD13AC0C94487AD8ED3B6877F : [('SUCCEEDED', '2019-07-05 23:29:41.927196', 0.5837132930755615), ('SUCCEEDED', '2019-07-05 23:29:42.613310', 0.4149782657623291), ('SUCCEEDED', '2019-07-05 23:29:43.313887', 0.40435171127319336), ('SUCCEEDED', '2019-07-05 23:29:43.914470', 0.3811912536621094), ('SUCCEEDED', '2019-07-05 23:29:44.609796', 0.5054607391357422), ('SUCCEEDED', '2019-07-05 23:29:45.690206', 0.7719564437866211), ('SUCCEEDED', '2019-07-05 23:29:46.263253', 0.4417731761932373), ('SUCCEEDED', '2019-07-05 23:29:47.031197', 0.5484879016876221), ('SUCCEEDED', '2019-07-05 23:29:47.718230', 0.4196751117706299), ('SUCCEEDED', '2019-07-05 23:29:48.309022', 0.44235873222351074)]
--- >% ---

My Patch:
--- %< ---
diff --git a/relay_perf.py b/relay_perf.py
index 52b5444..cb54371 100644
--- a/relay_perf.py
+++ b/relay_perf.py
@@ -14,7 +14,7 @@ from twisted.web.client import readBody
 
 def write_json(filestem, data):
     now = datetime.datetime.now().strftime("%Y%m%d_%H%M");
-    print(data)
+    #print(data)
     jsonStr = json.dumps(data)
     with open(filestem + "_" + now + ".json", "w") as f:
         f.write(jsonStr)
@@ -103,11 +103,14 @@ async def _main(reactor):
     config.save()
     routers = state.all_routers
 
-    guard1 = state.routers_by_hash["$F6740DEABFD5F62612FA025A5079EA72846B1F67"]
+    guard1 = state.routers_by_hash["$9973E1E9730A58FDBA9E112D2B3342D2C0D921B5"]
     exits = list(filter(lambda router: "exit" in router.flags, routers))
+    exits = list(filter(lambda router: "0FF233C8D78A17B8DB7C8257D2E05CD5AA7C6B88" in router.unique_name, exits))
     exit_results = await test_exits(reactor, state, socks, guard1, exits, 10)
     exit_results["_relays"] = relay_data(True)
-    write_json("../all_exit_results/exit_results", exit_results)
+    write_json("exit_results.json", exit_results)
+
+    return
 
     exit_node = state.routers_by_hash["$1AE949967F82BBE7534A3D6BA77A7EBE1CED4369"]
     relays = list(filter(lambda router: "exit" not in router.flags, routers))
--- >% ---

Regrads..
Tim

Am Freitag, den 28.06.2019, 20:16 +0000 schrieb nusenu:
> Dear Exit relay operators,
> 
> first of all thanks for running exit relays!
> 
> One of the crucial service that you provide in addition to
> forwarding 
> TCP streams is DNS resolution for tor clients. 
> Exit relays which fail to resolve hostnames
> are barely useful for tor clients.
> 
> We noticed that lately the failure rates did increase significantly
> due to some major exit operators apparently having DNS issues and we
> would like
> to urge you to visit Arthur's "Tor Exit DNS Timeouts" 
> page that shows you the DNS error rate for exit relays:
> 
> https://arthuredelstein.net/exits/
> (the page is usually updated once a day)
> 
> Please consider checking your DNS if your exit relay consistently
> shows a non zero 
> timeout rate - and make sure you run an up to date tor version.
> 
> If you are an exit operator but have no (or no working) ContactInfo,
> please consider
> updating that field in your torrc so we can reach you if something is
> wrong
> with your relay.
> 
> kind regards
> nusenu
> _______________________________________________
> tor-relays mailing list
> tor-relays@xxxxxxxxxxxxxxxxxxxx
> https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays

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