this occurred when these relays upgraded from tor 0.3.3.10 to 0.3.4.9 (package maintainer update)
All these relays were behind NAT devices and they relied on a tor feature that got removed between these two versions:
o Removed features: - The PortForwarding and PortForwardingHelper features have been removed. [...]https://trac.torproject.org/projects/tor/ticket/25409
I guess I somehow expected that: the maintainer patched tor 0.3.4.10 to added this feature again and here we go again with the flood of relays using that version of tor:
79 relays from 2019-01-11:
| Up | Ext | JoinTime | Nickname | Version | IP | AS | CC | ORp | Dirp | OS | Contact | eFamMembers | FP | |------+-------+------------+------------+-----------+-----------------+------------------------------------------+------+-------+--------+-------+-----------+---------------+------------------------------------------| | 0 | 0 | 01:06:55 | snap269 | 0.3.4.10 | 117.104.229.222 | Instatelecom Limited | af | 43453 | 0 | Linux | None | 1 | CF52FF9F481C618E540D5DACB0C2875F1B7687B5 | | 0 | 0 | 01:27:25 | snap269 | 0.3.4.10 | 90.253.141.146 | Vodafone Limited | gb | 46089 | 0 | Linux | None | 1 | B483C5FE8A2888F8E02885D8488404DBBEFBCF3B | | 0 | 0 | 02:04:06 | snap269 | 0.3.4.10 | 84.109.18.79 | Bezeq International | il | 43663 | 0 | Linux | None | 1 | 4CB2C1DED2C3C0C1A3629C6EB89BEDD063839F3A | | 0 | 0 | 02:04:44 | snap269 | 0.3.4.10 | 24.171.142.150 | Time Warner Cable Internet LLC | us | 35659 | 0 | Linux | None | 1 | 4E323B6D6EEA0134C74311B02139A1899BB42396 | | 1 | 0 | 02:06:28 | snap269 | 0.3.4.10 | 102.251.43.31 | TELKOMMOBILE | za | 37359 | 0 | Linux | None | 1 | 156C88E2AC25EE27A5DE774DF33294A1F0BE9659 | | 0 | 0 | 02:09:26 | snap269 | 0.3.4.10 | 173.72.24.170 | MCI Communications Services, Inc. d/b/a | us | 35413 | 0 | Linux | None | 1 | F06D46106A5508D3904F20E5E316978E1C40C524 | | 1 | 0 | 02:32:49 | snap269 | 0.3.4.10 | 37.14.181.6 | Orange Espagne SA | es | 33927 | 0 | Linux | None | 1 | 01A9601468D4EDB410D8CAFCB6AFF57BDCECCC79 | | 0 | 0 | 03:32:46 | snap269 | 0.3.4.10 | 46.158.228.64 | Rostelecom | ru | 32945 | 0 | Linux | None | 1 | A1F23D3FAE72CCC04E9A2302E21F4FFA86B004BF | | 0 | 0 | 03:46:57 | snap269 | 0.3.4.10 | 96.58.48.239 | BRIGHT HOUSE NETWORKS, LLC | us | 34779 | 0 | Linux | None | 1 | 75ECA8970059EC52ABDE432296DD379D926B4B9E | | 0 | 0 | 03:59:27 | snap269 | 0.3.4.10 | 167.56.51.66 | Administracion Nacional de Telecomunicac | uy | 43415 | 0 | Linux | None | 1 | FBA355B99ED355440C22CD305C4106CD5EBFBF8D | | 0 | 0 | 03:59:53 | snap269 | 0.3.4.10 | 106.51.69.243 | Atria Convergence Technologies Pvt. Ltd. | in | 35099 | 0 | Linux | None | 1 | F708D88E38D31F47574FA086AFE95D77A0F57D3C | | 1 | 0 | 04:07:21 | snap269 | 0.3.4.10 | 178.149.21.184 | Serbia BroadBand-Srpske Kablovske mreze | rs | 33259 | 0 | Linux | None | 1 | 235658FF31A58ED10A86C5C04EDDD33A0ED3D27C | | 1 | 0 | 04:10:50 | snap269 | 0.3.4.10 | 80.6.137.83 | Virgin Media Limited | gb | 36423 | 0 | Linux | None | 1 | 3DB282CE152AA5C57521B5B24DAE9C9AE4D88F54 | | 0 | 0 | 04:13:10 | snap269 | 0.3.4.10 | 31.34.31.241 | Bouygues Telecom SA | fr | 34075 | 0 | Linux | None | 1 | D923E3AD062307A65F14F6F05E6A9D755376F7F5 | | 1 | 0 | 04:44:56 | snap269 | 0.3.4.10 | 86.213.118.11 | Orange | fr | 45521 | 0 | Linux | None | 1 | E7EC0C654C83E35F41337DB3A8CE2FBAAEA96619 | | 1 | 0 | 04:48:14 | snap269 | 0.3.4.10 | 95.84.154.208 | Rostelecom | ru | 43275 | 0 | Linux | None | 1 | BAD04160018D61F1783BCE20A78619BCABC6409E | | 1 | 0 | 05:05:41 | snap269 | 0.3.4.10 | 71.193.142.132 | Comcast Cable Communications, LLC | us | 38941 | 0 | Linux | None | 1 | 6FF713C117BBA89221BA58B2D7925DBA12BAAAE9 | | 1 | 0 | 05:33:27 | snap269 | 0.3.4.10 | 73.70.172.19 | Comcast Cable Communications, LLC | us | 41517 | 0 | Linux | None | 1 | EBF57F6D4EBA3EDA564461E07BB117E459AA89F7 | | 0 | 0 | 05:47:50 | snap269 | 0.3.4.10 | 209.78.15.154 | AT&T Corp. | us | 42487 | 0 | Linux | None | 1 | E5A51629041C5B92F9379245909E9573BD133BE4 | | 1 | 0 | 05:57:15 | snap269 | 0.3.4.10 | 65.130.61.137 | CenturyLink Communications, LLC | us | 42923 | 0 | Linux | None | 1 | E7C6F5D796B1CFC79028DF01DAD9CAFD0BF56347 | | 1 | 0 | 06:10:32 | snap269 | 0.3.4.10 | 88.174.80.195 | Free SAS | fr | 33841 | 0 | Linux | None | 1 | 607147525CC2DF26B185E88FD65B9DEF40EBC005 | | 1 | 0 | 06:26:56 | snap269 | 0.3.4.10 | 95.73.77.39 | Rostelecom | ru | 41435 | 0 | Linux | None | 1 | 9017D52158D183CC9E9E4A81C8BE3512F0EE7347 | | 0 | 0 | 06:27:37 | snap269 | 0.3.4.10 | 172.73.205.110 | Time Warner Cable Internet LLC | us | 43425 | 0 | Linux | None | 1 | 8AA78CE51B722C19D683C79D3E945F4044F01A9A | | 1 | 0 | 06:29:08 | snap269 | 0.3.4.10 | 90.255.48.210 | Vodafone Limited | gb | 36351 | 0 | Linux | None | 1 | 01A50452FFC69D41C18C8EFE1FCEFA495E721097 | | 0 | 0 | 07:05:24 | snap269 | 0.3.4.10 | 125.62.96.245 | Quadrant Televentures Limited | in | 39831 | 0 | Linux | None | 1 | CCB757FF2505217A80EF53DA50652BC4BB962958 | | 0 | 0 | 07:13:02 | snap269 | 0.3.4.10 | 82.193.105.199 | PJSC Industrial Media Network | ua | 43289 | 0 | Linux | None | 1 | BA894CF031FEE48FF607D0320F6CF3B8468BBC5F | | 1 | 0 | 08:12:47 | snap269 | 0.3.4.10 | 86.80.34.108 | KPN B.V. | nl | 38313 | 0 | Linux | None | 1 | 910F4CE167A4DAA6C4B18BC21D08D08DC11F5DAC | | 0 | 0 | 08:25:42 | snap269 | 0.3.4.10 | 109.199.76.120 | Asta-net S.A. | pl | 45727 | 0 | Linux | None | 1 | EC9D629C3D99FE998EC534740D1F25A96122328A | | 0 | 0 | 08:27:20 | snap269 | 0.3.4.10 | 79.118.156.221 | RCS & RDS | ro | 33477 | 0 | Linux | None | 1 | 8C0D9487A235B3D41C69D90E2AA1C2A1F52FB577 | | 1 | 0 | 08:29:30 | snap269 | 0.3.4.10 | 199.188.66.50 | ImOn Communications, LLC | us | 46757 | 0 | Linux | None | 1 | 82E88061F7CD48D25153BE8EBAAD5D792962EF6B | | 0 | 0 | 08:57:31 | snap269 | 0.3.4.10 | 83.205.216.204 | Orange | fr | 41935 | 0 | Linux | None | 1 | B21DABF8F133B4DBF616F6263727DD760BAED94F | | 0 | 0 | 09:00:57 | snap269 | 0.3.4.10 | 74.78.40.144 | Time Warner Cable Internet LLC | us | 35357 | 0 | Linux | None | 1 | 28A6A4B11CF29C03CA354C396F4A26647DBB422B | | 0 | 0 | 09:07:06 | snap269 | 0.3.4.10 | 76.178.23.156 | Oceanic Internet | us | 41131 | 0 | Linux | None | 1 | 618F34F4B3A421F801F80DE8859E8E9D85C604F5 | | 0 | 0 | 09:14:44 | snap269 | 0.3.4.10 | 178.140.107.17 | Rostelecom | ru | 42135 | 0 | Linux | None | 1 | D0843B28910344D32673177AFC83CEC60F63A60E | | 1 | 0 | 09:26:48 | snap269 | 0.3.4.10 | 176.207.47.42 | Wind Telecomunicazioni SpA | it | 36741 | 0 | Linux | None | 1 | 92E0798CA43C6A0A8D44643DDB57C22A68C6C06F | | 1 | 0 | 10:10:59 | snap269 | 0.3.4.10 | 47.184.147.216 | Frontier Communications of America, Inc. | us | 41399 | 0 | Linux | None | 1 | 8BEF59D13BD80CB6B5E1CD43C0D0A451910A67D5 | | 0 | 0 | 10:13:00 | snap269 | 0.3.4.10 | 87.219.151.33 | Orange Espagne SA | es | 37599 | 0 | Linux | None | 1 | 81BA9A7796ED6309DEC3499B072905D0469514F9 | | 0 | 0 | 10:33:56 | snap269 | 0.3.4.10 | 191.178.169.80 | CLARO S.A. | br | 39363 | 0 | Linux | None | 1 | 96D1E2EF9B089B3F4037CE3229A2D69148484825 | | 0 | 0 | 10:38:59 | snap269 | 0.3.4.10 | 82.227.216.129 | Free SAS | fr | 36317 | 0 | Linux | None | 1 | D97D3DDCDD36F06D8CE8799903C9FD28A805C36F | | 1 | 0 | 10:55:19 | snap269 | 0.3.4.10 | 76.67.91.179 | Bell Canada | ca | 41451 | 0 | Linux | None | 1 | 7BDAE735F4F8F771361DB912994F6E7A6FE28BB6 | | 1 | 0 | 11:17:57 | snap269 | 0.3.4.10 | 5.55.60.243 | Vodafone-panafon Hellenic Telecommunicat | gr | 37399 | 0 | Linux | None | 1 | F2A0B0412A5CCAA74C310E0BDE5A681D0CDB4745 | | 0 | 0 | 11:19:59 | snap269 | 0.3.4.10 | 109.230.192.42 | Pars Online PJS | ir | 45891 | 0 | Linux | None | 1 | C47670C4F2CEE914039A241CCE388087C4C75197 | | 0 | 0 | 11:32:48 | snap269 | 0.3.4.10 | 109.14.185.20 | SFR SA | fr | 35237 | 0 | Linux | None | 1 | AB27C4D1B52819D5BEFBA9F1338E766C5D247217 | | 0 | 0 | 12:19:36 | snap269 | 0.3.4.10 | 2.222.117.216 | Sky UK Limited | gb | 36291 | 0 | Linux | None | 1 | B83B9B3D098315D0BB0FDA8A452CDB77615D12E9 | | 0 | 0 | 12:28:20 | snap269 | 0.3.4.10 | 94.66.69.120 | OTEnet S.A. | gr | 41839 | 0 | Linux | None | 1 | DFC0D9EAE006205D5EAEA00A3657119BCA583C85 | | 0 | 0 | 12:45:29 | snap269 | 0.3.4.10 | 109.90.227.20 | Liberty Global B.V. | de | 42087 | 0 | Linux | None | 1 | E7D3A414EAC64AE146F02DF90C9C32CB4A3933F7 | | 0 | 0 | 13:13:52 | snap269 | 0.3.4.10 | 81.11.237.119 | Proximus NV | be | 35325 | 0 | Linux | None | 1 | 219D0EC1745EA8C5B93F5C9AF5602646B471FEB6 | | 0 | 0 | 13:37:29 | snap269 | 0.3.4.10 | 37.135.114.61 | Orange Espagne SA | es | 42827 | 0 | Linux | None | 1 | 363C8EC721A6767AA68B318335D1E11531A890C9 | | 0 | 0 | 13:50:09 | snap269 | 0.3.4.10 | 154.124.103.161 | Autonomous System | sn | 33171 | 0 | Linux | None | 1 | ED0B07C311090003BDC2577055C77FC5BDBA680C | | 0 | 0 | 13:57:45 | snap269 | 0.3.4.10 | 95.30.35.107 | PVimpelCom | ru | 36343 | 0 | Linux | None | 1 | C11D12E0B4E522166BC162B146A0036DC90488C4 | | 0 | 0 | 14:01:44 | snap269 | 0.3.4.10 | 83.31.165.111 | Orange Polska Spolka Akcyjna | pl | 34842 | 0 | Linux | None | 1 | A202DA8B0014770EF825F476D67A8E15C26AB976 | | 0 | 0 | 14:28:29 | snap269 | 0.3.4.10 | 94.236.179.104 | Vivacom | bg | 37285 | 0 | Linux | None | 1 | 6D34C625B21024E626F837C21E2879D5A09520F7 | | 0 | 0 | 14:45:50 | snap269 | 0.3.4.10 | 73.166.182.149 | Comcast Cable Communications, LLC | us | 46743 | 0 | Linux | None | 1 | 5EB182CDEE393092CD2B5FA4CF9119B2D5BD9BEB | | 0 | 0 | 14:56:04 | snap269 | 0.3.4.10 | 176.163.145.110 | Bouygues Telecom SA | fr | 38499 | 0 | Linux | None | 1 | 684ED3887C1E3B8780B6251545D41187C87F5A1E | | 0 | 0 | 14:57:49 | snap269 | 0.3.4.10 | 93.4.138.84 | SFR SA | fr | 37842 | 0 | Linux | None | 1 | 3E98B7449778AC2A18862EAFBC0E0562629F4425 | | 0 | 0 | 15:13:00 | snap269 | 0.3.4.10 | 179.159.23.13 | CLARO S.A. | br | 36489 | 0 | Linux | None | 1 | F95A58569241CA8169E57FC62516A307DC3E679B | | 0 | 0 | 16:40:36 | snap269 | 0.3.4.10 | 31.23.140.216 | Rostelecom | ru | 36513 | 0 | Linux | None | 1 | 20A4F142C776405470E1FB7A8AE001E5C68F1E66 | | 1 | 0 | 16:46:10 | snap269 | 0.3.4.10 | 84.117.160.149 | Liberty Global B.V. | ro | 42377 | 0 | Linux | None | 1 | 388827DB7B55749DB790D19E8E693879B4512958 | | 0 | 0 | 16:57:50 | snap269 | 0.3.4.10 | 89.159.12.9 | SFR SA | fr | 34397 | 0 | Linux | None | 1 | E30EE25EC1D8759D148CDACB857B5887AA3D1449 | | 0 | 0 | 17:13:47 | snap269 | 0.3.4.10 | 46.158.50.84 | Rostelecom | ru | 33895 | 0 | Linux | None | 1 | 43C52D5106573B180779BB58EA14E75710BE2D9D | | 1 | 0 | 17:18:38 | snap269 | 0.3.4.10 | 88.127.151.3 | Free SAS | fr | 43287 | 0 | Linux | None | 1 | 858C53F6F4FC87973395389CB45ACB61892CEFFA | | 0 | 0 | 17:27:33 | snap269 | 0.3.4.10 | 151.60.22.154 | Wind Telecomunicazioni SpA | it | 43395 | 0 | Linux | None | 1 | 72144DB24F3CA11CCC857C831FC06278DE0BFD77 | | 0 | 0 | 17:37:38 | snap269 | 0.3.4.10 | 68.8.115.73 | Cox Communications Inc. | us | 43215 | 0 | Linux | None | 1 | 33AF74D88DFDDD86EB32A35D5860379BBCA6D51A | | 0 | 0 | 18:59:12 | snap269 | 0.3.4.10 | 96.227.90.26 | MCI Communications Services, Inc. d/b/a | us | 46479 | 0 | Linux | None | 1 | 65C6E9A4A044ED8D8D2B011371B06CEDB7F8FB5C | | 0 | 0 | 19:27:49 | snap269 | 0.3.4.10 | 79.43.53.254 | Telecom Italia | it | 44881 | 0 | Linux | None | 1 | 6CEE204DCEF2A62EAB8EE056D023F3F3AAE9AB06 | | 0 | 0 | 20:14:50 | snap269 | 0.3.4.10 | 89.178.228.224 | VimpelCom | ru | 44343 | 0 | Linux | None | 1 | D2A762778B62C5B1519A779F0397F39C879426DE | | 0 | 0 | 20:34:50 | snap269 | 0.3.4.10 | 24.232.110.203 | CABLEVISION S.A. | ar | 43685 | 0 | Linux | None | 1 | EE5EA48EB4A5FE62A72CBD89E58BAF984561325C | | 0 | 0 | 20:40:51 | snap269 | 0.3.4.10 | 88.170.120.45 | Free SAS | fr | 34129 | 0 | Linux | None | 1 | 0B28E8F6A62DC9C43EBF28A550327AAB877D946C | | 0 | 0 | 20:41:58 | snap269 | 0.3.4.10 | 177.96.80.171 | TELEF\u00D4NICA BRASIL S.A | br | 41813 | 0 | Linux | None | 1 | 6B7392BA134BECCCD857A97A9D733EA3DFB68968 | | 0 | 0 | 20:49:27 | snap269 | 0.3.4.10 | 95.23.242.175 | Orange Espagne SA | es | 37255 | 0 | Linux | None | 1 | 4A40BE59085ED7630B0DB07F231DC85FE900EF0A | | 1 | 0 | 21:22:18 | snap269 | 0.3.4.10 | 73.100.0.74 | Comcast Cable Communications, LLC | us | 40331 | 0 | Linux | None | 1 | 246D67B391C9FD8AC011D703BFB0C282463095A4 | | 0 | 0 | 21:43:39 | snap269 | 0.3.4.10 | 2.221.208.93 | Sky UK Limited | gb | 45175 | 0 | Linux | None | 1 | ED531C730B762434347C6E293F1D37A37FC8CCAB | | 0 | 0 | 21:58:19 | snap269 | 0.3.4.10 | 78.244.144.200 | Free SAS | fr | 36741 | 0 | Linux | None | 1 | 62681D0F48B2F695E39CC447393708A93FA40FC8 | | 1 | 0 | 22:08:50 | snap269 | 0.3.4.10 | 178.136.96.217 | Private Joint-stock Company farlep-inves | ua | 45031 | 0 | Linux | None | 1 | 9D8611A77F07FAA6EE81DDD074F71EB9D1A1AE85 | | 0 | 0 | 22:09:48 | snap269 | 0.3.4.10 | 197.0.1.184 | TOPNET | tn | 46335 | 0 | Linux | None | 1 | E62410E0EBB171B1020A096F0096DAD87A7A9497 | | 0 | 0 | 22:25:54 | snap269 | 0.3.4.10 | 85.240.120.247 | Servicos De Comunicacoes E Multimedia S. | pt | 43323 | 0 | Linux | None | 1 | 984433431FE96C5DE15AEC3AF20FCEE3862AF717 | | 0 | 0 | 22:46:51 | snap269 | 0.3.4.10 | 151.40.102.85 | Wind Telecomunicazioni SpA | it | 33875 | 0 | Linux | None | 1 | 965FD1582FAF3BD4E3D63E2D20A18EF033D7FB84 | | 1 | 0 | 11:01:45 | snap270 | 0.3.4.10 | 24.255.132.3 | Cox Communications Inc. | us | 45197 | 0 | Linux | None | 1 | 611B759774855823C3CC9FA92D9E79B3CF259D96 | | 1 | 0 | 22:47:18 | snap270 | 0.3.4.10 | 202.150.96.115 | CallPlus Services Limited | nz | 36839 | 0 | Linux | None | 1 | B6555E66FBCAEBFF64F5343031F16DCFF78F55EA |