Mercurial > prosody-modules

annotate mod_host_guard/mod_host_guard.lua @ 5787:e79f9dec35c0

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mod_c2s_conn_throttle: Reduce log level from error->info Our general policy is that "error" should never be triggerable by remote entities, and that it is always about something that requires admin intervention. This satisfies neither condition. The "warn" level can be used for unexpected events/behaviour triggered by remote entities, and this could qualify. However I don't think failed auth attempts are unexpected enough. I selected "info" because it is what is also used for other notable session lifecycle events.
author Matthew Wild <mwild1@gmail.com>
date Thu, 07 Dec 2023 15:46:50 +0000
parents 7dbde05b48a9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
493
b1b80319bbf6 mod_host_guard: renamed mod_component_guard to mod_host_guard, as it really works with all hosts, finally decided to wiki it out and not merge it with the s2s_blackwhitelisting module.
Marco Cirillo <maranda@lightwitch.org>
parents: 460
diff changeset
1 -- (C) 2011, Marco Cirillo (LW.Org)
519
219ffe3541ff mod_host_guard: updated banner.
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parents: 515
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2 -- Block or restrict by blacklist remote access to local components or hosts.
456
73f06a14390a mod_component_guard: initial commit.
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3
460
9bb9343f3c7a mod_component_guard: made module global, refactored init.
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4 module:set_global()
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5
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6 local hosts = hosts
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7 local incoming_s2s = prosody.incoming_s2s
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8
493
b1b80319bbf6 mod_host_guard: renamed mod_component_guard to mod_host_guard, as it really works with all hosts, finally decided to wiki it out and not merge it with the s2s_blackwhitelisting module.
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parents: 460
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9 local guard_blockall = module:get_option_set("host_guard_blockall", {})
515
e98fe28c50b0 mod_host_guard: added exceptions/whitelisting to the blockall logic (makes little sense otherwise has s2s_disallow = true does the same)
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parents: 494
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10 local guard_ball_wl = module:get_option_set("host_guard_blockall_exceptions", {})
493
b1b80319bbf6 mod_host_guard: renamed mod_component_guard to mod_host_guard, as it really works with all hosts, finally decided to wiki it out and not merge it with the s2s_blackwhitelisting module.
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parents: 460
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11 local guard_protect = module:get_option_set("host_guard_selective", {})
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parents: 460
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12 local guard_block_bl = module:get_option_set("host_guard_blacklist", {})
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13
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14 local config = configmanager
682
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15 local error_reply = require "util.stanza".error_reply
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16 local tostring = tostring
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17
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18 local function s2s_hook (event)
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19 local origin, stanza = event.session or event.origin, event.stanza or false
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20 local to_host, from_host = (not stanza and origin.to_host) or stanza.attr.to, (not stanza and origin.from_host) or stanza.attr.from
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21
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22 if origin.type == "s2sin" or origin.type == "s2sin_unauthed" then
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23 if guard_blockall:contains(to_host) and not guard_ball_wl:contains(from_host) or
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24 guard_block_bl:contains(from_host) and guard_protect:contains(to_host) then
682
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parents: 681
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25 module:log("error", "remote service %s attempted to access restricted host %s", from_host, to_host)
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26 origin:close({condition = "policy-violation", text = "You're not authorized, good bye."})
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27 return false
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28 end
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29 end
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30
528
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31 return nil
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32 end
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33
682
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34 local function rr_hook (event)
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35 local from_host, to_host, send, stanza = event.from_host, event.to_host, (event.origin and event.origin.send) or function() end, event.stanza
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36
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37 if guard_blockall:contains(from_host) and not guard_ball_wl:contains(to_host) or
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38 guard_block_bl:contains(to_host) and guard_protect:contains(from_host) then
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parents: 681
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39 module:log("info", "attempted to connect to a filtered remote host %s", to_host)
684
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40 if stanza.attr.type ~= "error" then send(error_reply(event.stanza, "cancel", "policy-violation", "Communicating with a filtered remote server is not allowed.")) end
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41 return true
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42 end
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43
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44 return nil
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45 end
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46
728
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47 local function handle_activation (host, u)
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48 if guard_blockall:contains(host) or guard_protect:contains(host) then
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49 if hosts[host] and config.get(host, "core", "authentication") ~= "anonymous" then
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50 hosts[host].events.add_handler("s2sin-established", s2s_hook, 500)
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51 hosts[host].events.add_handler("route/remote", rr_hook, 500)
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52 hosts[host].events.add_handler("stanza/jabber:server:dialback:result", s2s_hook, 500)
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53 if not u then
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54 module:log ("debug", "adding host protection for: "..host)
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55 else
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56 module:log ("debug", "updating or adding host protection for: "..host)
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57 end
456
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58 end
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59 end
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60 end
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61
728
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62 local function handle_deactivation (host, u, i)
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63 if guard_blockall:contains(host) or guard_protect:contains(host) then
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64 if hosts[host] and config.get(host, "core", "authentication") ~= "anonymous" then
680
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parents: 537
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65 hosts[host].events.remove_handler("s2sin-established", s2s_hook)
682
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66 hosts[host].events.remove_handler("route/remote", rr_hook)
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parents: 537
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67 hosts[host].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook)
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68 if not u and not i then module:log ("debug", "removing host protection for: "..host) end
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69 end
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70 end
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71 end
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72
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73 local function close_filtered()
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74 for _, host in pairs(hosts) do
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75 for name, session in pairs(host.s2sout) do
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76 if guard_blockall:contains(session.host) and not guard_ball_wl:contains(session.to_host) or
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77 guard_block_bl:contains(session.to_host) and guard_protect:contains(session.host) then
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78 module:log("info", "closing down s2s outgoing stream to filtered entity %s", tostring(session.to_host))
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79 session:close()
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80 end
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81 end
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82 end
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83 for session in pairs(incoming_s2s) do
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84 if session.to_host and session.from_host and
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85 (guard_blockall:contains(session.to_host) and not guard_ball_wl:contains(session.from_host) or
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86 guard_block_bl:contains(session.from_host) and guard_protect:contains(session.to_host)) then
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87 module:log("info", "closing down s2s incoming stream from filtered entity %s", tostring(session.from_host))
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88 session:close()
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89 end
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90 end
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91 end
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92
728
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93 local function init_hosts(u, i)
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94 for n in pairs(hosts) do
727
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95 if guard_blockall:contains(n) or guard_protect:contains(n) then
834
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96 handle_deactivation(n, u, i) ; handle_activation(n, u)
727
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97 end
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98 end
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99 close_filtered()
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100 end
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101
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102 local function reload()
528
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103 module:log ("debug", "server configuration reloaded, rehashing plugin tables...")
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104 guard_blockall = module:get_option_set("host_guard_blockall", {})
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parents: 519
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105 guard_ball_wl = module:get_option_set("host_guard_blockall_exceptions", {})
537
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parents: 533
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106 guard_protect = module:get_option_set("host_guard_selective", {})
528
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107 guard_block_bl = module:get_option_set("host_guard_blacklist", {})
537
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108
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109 init_hosts(true)
458
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110 end
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111
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parents: 457
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112 local function setup()
528
1737c08fde30 mod_host_guard: stick to one code "punctuation" style.
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parents: 519
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113 module:log ("debug", "initializing host guard module...")
537
50be30f203f3 mod_host_guard: fixed plugin, minor code refactor.
Marco Cirillo <maranda@lightwitch.org>
parents: 533
diff changeset
114 module:hook ("host-activated", handle_activation)
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parents: 533
diff changeset
115 module:hook ("host-deactivated", handle_deactivation)
528
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parents: 519
diff changeset
116 module:hook ("config-reloaded", reload)
458
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diff changeset
117
728
8ad2e24f5efd mod_host_guard: reduced code duplication and added better logging.
Marco Cirillo <maranda@lightwitch.org>
parents: 727
diff changeset
118 init_hosts(false, true)
456
73f06a14390a mod_component_guard: initial commit.
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parents:
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119 end
458
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120
725
f79fda2d7e51 mod_host_guard: host handlers are now cleaned properly on module unload (and also still on re/load to be safe).
Marco Cirillo <maranda@lightwitch.org>
parents: 724
diff changeset
121 function module.unload()
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122 module:log ("debug", "removing host handlers as module is being unloaded...")
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parents: 724
diff changeset
123 for n in pairs(hosts) do
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124 hosts[n].events.remove_handler("s2sin-established", s2s_hook)
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parents: 724
diff changeset
125 hosts[n].events.remove_handler("route/remote", rr_hook)
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parents: 724
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126 hosts[n].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook)
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parents: 724
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127 end
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128 end
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129
458
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diff changeset
130 if prosody.start_time then
528
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parents: 519
diff changeset
131 setup()
458
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parents: 457
diff changeset
132 else
533
47b9053dba38 mod_host_guard: replaced prosody.events.add_handler with module:hook.
Marco Cirillo <maranda@lightwitch.org>
parents: 528
diff changeset
133 module:hook ("server-started", setup)
458
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parents: 457
diff changeset
134 end