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'FireWall KNock OPerator': a port knocker to Linux servers

fwknop stands for the 'FireWall KNock OPerator', and implements an authorization scheme called Single Packet Authorization (SPA) that is based around Netfilter and libpcap. SPA requires only a single encrypted packet in order to communicate various pieces of information including desired access through a Netfilter policy and/or complete commands to execute on the target system. By using Netfilter to maintain a 'default drop' stance, the main application of this program is to protect services such as OpenSSH with an additional layer of security in order to make the exploitation of vulnerabilities (both 0-day and unpatched code) much more difficult. The authorization server passively monitors authorization packets via libcap and hence there is no 'server' to which to connect in the traditional sense. Access to a protected service is only granted after a valid encrypted and non-replayed packet is monitored. This port installs the client side script that you run to gain access to a Linux box.

Version: 2.6.10 License: GPL-2+ GitHub
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32 build(s) found
Builder Build Number Start Time Elapsed Time Watcher Build Status
15 14211 2024-10-15 6:50:36 0:01:13 1608 build successful
10.6 175863 2024-08-01 9:31:04 0:00:31 61507 failed install-dependencies
10.6.x86_64 211653 2024-08-01 9:19:22 0:00:21 61552 failed install-dependencies
13.arm64 62978 2024-05-28 5:13:16 0:00:50 21597 build successful
14 40165 2024-05-28 4:18:03 0:03:44 10055 build successful
14.arm64 32164 2024-05-28 3:04:43 0:00:54 9694 build successful
10.6.x86_64 204173 2024-05-27 23:28:30 0:01:01 59235 failed install-port
10.6.x86_64 204172 2024-05-27 23:23:53 0:02:32 59234 failed install-port
10.15 186942 2024-05-27 23:23:28 0:03:47 57213 build successful
10.12 276307 2024-05-27 23:23:07 0:03:26 85419 build successful
11 157776 2024-05-27 23:22:43 0:04:16 47136 build successful
10.11 266662 2024-05-27 23:22:26 0:09:03 86640 build successful
10.14 210239 2024-05-27 23:22:07 0:07:44 68216 build successful
10.9 279229 2024-05-27 23:21:47 0:02:48 86212 build successful
10.13 235793 2024-05-27 23:21:27 0:03:02 77473 build successful
12 109665 2024-05-27 23:21:06 0:03:50 36001 build successful
10.8 179983 2024-05-27 23:20:37 0:04:22 57003 build successful
10.10 272022 2024-05-27 23:20:10 0:02:43 86538 build successful
10.7 193005 2024-05-27 23:19:40 0:02:32 58951 build successful
13 71280 2024-05-27 23:19:10 0:05:31 21855 build successful
10.6 168429 2024-05-27 23:18:38 0:02:54 59193 failed install-port
12.arm64 129263 2024-05-27 23:17:59 0:01:01 35975 build successful
14.arm64 8921 2024-01-19 17:55:57 0:00:50 4227 build successful
14 13709 2023-11-25 1:17:50 0:05:09 2172 build successful
13.arm64 9555 2023-03-07 6:23:53 0:00:45 4049 build successful
13 10306 2023-01-01 20:35:24 0:02:03 1362 build successful
12 15051 2022-01-16 10:30:24 0:01:54 3544 build successful
12.arm64 27546 2021-11-24 13:55:11 0:00:49 1547 build successful
11 11863 2021-01-03 14:53:53 0:04:00 1584 build successful
11.arm64 7272 2021-01-03 13:41:36 0:01:18 1681 build successful
10.15 17196 2019-12-27 23:28:42 0:05:14 1729 build successful
10.9 95836 2019-08-25 21:55:46 0:03:28 27005 build successful