Mercurial > prosody-modules
annotate mod_firewall/README.markdown @ 1889:46c49cff1023
mod_extdisco: Add a README
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Thu, 01 Oct 2015 20:53:42 +0200 |
| parents | 4d73a1a6ba68 |
| children | ce991c678370 |
| rev | line source |
|---|---|
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
1 --- |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
2 labels: |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
3 - 'Stage-Alpha' |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
4 summary: 'A rule-based stanza filtering module' |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
5 ... |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
6 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
7 ------------------------------------------------------------------------ |
| 1782 | 8 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
9 **Note:** mod\_firewall is in its very early stages. This documentation |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
10 is liable to change, and some described functionality may be missing, |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
11 incomplete or contain bugs. Feedback is welcome in the comments section |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
12 at the bottom of this page. |
| 1782 | 13 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
14 ------------------------------------------------------------------------ |
| 1782 | 15 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
16 Introduction |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
17 ============ |
| 1782 | 18 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
19 A firewall is an invaluable tool in the sysadmin's toolbox. However |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
20 while low-level firewalls such as iptables and pf are incredibly good at |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
21 what they do, they are generally not able to handle application-layer |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
22 rules. |
| 1782 | 23 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
24 The goal of mod\_firewall is to provide similar services at the XMPP |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
25 layer. Based on rule scripts it can efficiently block, bounce, drop, |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
26 forward, copy, redirect stanzas and more! Furthermore all rules can be |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
27 applied and updated dynamically at runtime without restarting the |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
28 server. |
| 1782 | 29 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
30 Details |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
31 ======= |
| 1782 | 32 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
33 mod\_firewall loads one or more scripts, and compiles these to Lua code |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
34 that reacts to stanzas flowing through Prosody. The firewall script |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
35 syntax is unusual, but straightforward. |
| 1782 | 36 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
37 A firewall script is dominated by rules. Each rule has two parts: |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
38 conditions, and actions. When a stanza matches all of the conditions, |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
39 all of the actions are executed in order. |
| 1782 | 40 |
| 41 Here is a simple example to block stanzas from spammer@example.com: | |
| 42 | |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
43 FROM: spammer@example.com |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
44 DROP. |
| 1782 | 45 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
46 FROM is a condition, and DROP is an action. This is about as simple as |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
47 it gets. How about heading to the other extreme? Let's demonstrate |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
48 something more complex that mod\_firewall can do for you: |
| 1782 | 49 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
50 %ZONE myorganisation: staff.myorg.example, support.myorg.example |
| 1782 | 51 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
52 ENTERING: myorganisation |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
53 KIND: message |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
54 TIME: 12am-9am, 5pm-12am, Saturday, Sunday |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
55 REPLY=Sorry, I am afraid our office is closed at the moment. If you need assistance, please call our 24-hour support line on 123-456-789. |
| 1782 | 56 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
57 This rule will reply with a short message whenever someone tries to send |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
58 a message to someone at any of the hosts defined in the 'myorganisation' |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
59 outside of office hours. |
| 1782 | 60 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
61 Firewall rules should be written to a `ruleset.pfw` file. Multiple such |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
62 rule files can be specified in the configuration using: |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
63 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
64 firewall_scripts = { "path/to/ruleset.pfw" } |
| 1782 | 65 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
66 Conditions |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
67 ---------- |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
68 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
69 All conditions must come before any action in a rule block. The |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
70 condition name is followed by a colon (':'), and the value to test for. |
| 1782 | 71 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
72 A condition can be preceded or followed by `NOT` to negate its match. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
73 For example: |
| 1782 | 74 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
75 NOT FROM: user@example.com |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
76 KIND NOT: message |
| 1782 | 77 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
78 ### Zones |
| 1782 | 79 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
80 A 'zone' is one or more hosts or JIDs. It is possible to match when a |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
81 stanza is entering or leaving a zone, while at the same time not |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
82 matching traffic passing between JIDs in the same zone. |
| 1782 | 83 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
84 Zones are defined at the top of a script with the following syntax (they |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
85 are not part of a rule block): |
| 1782 | 86 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
87 %ZONE myzone: host1, host2, user@host3, foo.bar.example |
| 1782 | 88 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
89 A host listed in a zone also matches all users on that host (but not |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
90 subdomains). |
| 1782 | 91 |
| 92 The following zone-matching conditions are supported: | |
| 93 | |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
94 Condition Matches |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
95 ------------ ------------------------------------------ |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
96 `ENTERING` When a stanza is entering the named zone |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
97 `LEAVING` When a stanza is leaving the named zone |
| 1782 | 98 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
99 ### Stanza matching |
| 1782 | 100 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
101 Condition Matches |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
102 ----------- ------------------------------------------------------------------------------------------------------------------------------------------------------------ |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
103 `KIND` The kind of stanza. May be 'message', 'presence' or 'iq' |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
104 `TYPE` The type of stanza. This varies depending on the kind of stanza. See 'Stanza types' below for more information. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
105 `PAYLOAD` The stanza contains a child with the given namespace. Useful for determining the type of an iq request, or whether a message contains a certain extension. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
106 `INSPECT` The node at the specified path exists or matches a given string. This allows you to look anywhere inside a stanza. See below for examples and more. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
107 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
108 #### Stanza types |
| 1782 | 109 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
110 Stanza Valid types |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
111 ---------- ------------------------------------------------------------------------------------------ |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
112 iq get, set, result, error |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
113 presence *available*, unavailable, probe, subscribe, subscribed, unsubscribe, unsubscribed, error |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
114 message normal, chat, groupchat, headline, error |
| 1782 | 115 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
116 **Note:** The type 'available' for presence does not actually appear in |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
117 the protocol. Available presence is signalled by the omission of a type. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
118 Similarly, a message stanza with no type is equivalent to one of type |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
119 'normal'. mod\_firewall handles these cases for you automatically. |
| 1782 | 120 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
121 #### INSPECT |
| 1782 | 122 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
123 INSPECT takes a 'path' through the stanza to get a string (an attribute |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
124 value or text content). An example is the best way to explain. Let's |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
125 check that a user is not trying to register an account with the username |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
126 'admin'. This stanza comes from [XEP-0077: In-band |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
127 Registration](http://xmpp.org/extensions/xep-0077.html#example-4): |
| 1782 | 128 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
129 <iq type='set' id='reg2'> |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
130 <query xmlns='jabber:iq:register'> |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
131 <username>bill</username> |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
132 <password>Calliope</password> |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
133 <email>bard@shakespeare.lit</email> |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
134 </query> |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
135 </iq> |
| 1782 | 136 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
137 KIND: iq |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
138 TYPE: set |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
139 PAYLOAD: jabber:iq:register |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
140 INSPECT: {jabber:iq:register}query/username#=admin |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
141 BOUNCE=not-allowed The username 'admin' is reserved. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
142 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
143 That weird string deserves some explanation. It is a path, divided into |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
144 segments by '/'. Each segment describes an element by its name, |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
145 optionally prefixed by its namespace in curly braces ('{...}'). If the |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
146 path ends with a '\#' then the text content of the last element will be |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
147 returned. If the path ends with '@name' then the value of the attribute |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
148 'name' will be returned. |
| 1782 | 149 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
150 INSPECT is somewhat slower than the other stanza matching conditions. To |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
151 minimise performance impact, always place it below other faster |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
152 condition checks where possible (e.g. above we first checked KIND, TYPE |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
153 and PAYLOAD matched before INSPECT). |
| 1782 | 154 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
155 ### Sender/recipient matching |
| 1782 | 156 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
157 Condition Matches |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
158 ----------- ------------------------------------------------------- |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
159 `FROM` The JID in the 'from' attribute matches the given JID |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
160 `TO` The JID in the 'to' attribute matches the given JID |
| 1782 | 161 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
162 These conditions both accept wildcards in the JID when the wildcard |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
163 expression is enclosed in angle brackets ('\<...\>'). For example: |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
164 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
165 # All users at example.com |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
166 FROM: <*>@example.com |
| 1782 | 167 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
168 # The user 'admin' on any subdomain of example.com |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
169 FROM: admin@<*.example.com> |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
170 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
171 You can also use [Lua's pattern |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
172 matching](http://www.lua.org/manual/5.1/manual.html#5.4.1) for more |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
173 powerful matching abilities. Patterns are a lightweight |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
174 regular-expression alternative. Simply contain the pattern in double |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
175 angle brackets. The pattern is automatically anchored at the start and |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
176 end (so it must match the entire portion of the JID). |
| 1782 | 177 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
178 # Match admin@example.com, and admin1@example.com, etc. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
179 FROM: <<admin%d*>>@example.com |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
180 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
181 **Note:** It is important to know that 'example.com' is a valid JID on |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
182 its own, and does **not** match 'user@example.com'. To perform domain |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
183 whitelists or blacklists, use Zones. |
| 1782 | 184 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
185 **Note:** Some chains execute before Prosody has performed any |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
186 normalisation or validity checks on the to/from JIDs on an incoming |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
187 stanza. It is not advisable to perform access control or similar rules |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
188 on JIDs in these chains (see the chain documentation for more info). |
| 1782 | 189 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
190 ### Time and date |
| 1782 | 191 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
192 #### TIME |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
193 |
| 1782 | 194 Matches stanzas sent during certain time periods. |
| 195 | |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
196 Condition Matches |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
197 ----------- ------------------------------------------------------------------------------------------- |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
198 TIME When the current server local time is within one of the comma-separated time ranges given |
| 1782 | 199 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
200 TIME: 10pm-6am, 14:00-15:00 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
201 REPLY=Zzzz. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
202 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
203 #### DAY |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
204 |
| 1782 | 205 It is also possible to match only on certain days of the week. |
| 206 | |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
207 Condition Matches |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
208 ----------- ----------------------------------------------------------------------------------------------------- |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
209 DAY When the current day matches one, or falls within a rage, in the given comma-separated list of days |
| 1782 | 210 |
| 211 Example: | |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
212 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
213 DAY: Sat-Sun, Wednesday |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
214 REPLY=Sorry, I'm out enjoying life! |
| 1782 | 215 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
216 ### Rate-limiting |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
217 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
218 It is possible to selectively rate-limit stanzas, and use rules to |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
219 decide what to do with stanzas when over the limit. |
| 1782 | 220 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
221 First, you must define any rate limits that you are going to use in your |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
222 script. Here we create a limiter called 'normal' that will allow 2 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
223 stanzas per second, and then we define a rule to bounce messages when |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
224 over this limit. Note that the `RATE` definition is not part of a rule |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
225 (multiple rules can share the same limiter). |
| 1782 | 226 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
227 %RATE normal: 2 (burst 3) |
| 1782 | 228 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
229 KIND: message |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
230 LIMIT: normal |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
231 BOUNCE=policy-violation (Sending too fast!) |
| 1782 | 232 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
233 The 'burst' parameter on the rate limit allows you to spread the limit |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
234 check over a given time period. For example the definition shown above |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
235 will allow the limit to be temporarily surpassed, as long as it is |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
236 within the limit after 3 seconds. You will almost always want to specify |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
237 a burst factor. |
| 1782 | 238 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
239 Both the rate and the burst can be fractional values. For example a rate |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
240 of 0.1 means only one event is allowed every 10 seconds. |
| 1782 | 241 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
242 The LIMIT condition actually does two things; first it counts against |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
243 the given limiter, and then it checks to see if the limiter over its |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
244 limit yet. If it is, the condition matches, otherwise it will not. |
| 1782 | 245 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
246 Condition Matches |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
247 ----------- -------------------------------------------------------------------------------------------------- |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
248 `LIMIT` When the named limit is 'used up'. Using this condition automatically counts against that limit. |
| 1782 | 249 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
250 **Note:** Reloading mod\_firewall resets the current state of any |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
251 limiters. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
252 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
253 Actions |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
254 ------- |
| 1782 | 255 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
256 Actions come after all conditions in a rule block. There must be at |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
257 least one action, though conditions are optional. |
| 1782 | 258 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
259 An action without parameters ends with a full-stop/period ('.'), and one |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
260 with parameters uses an equals sign ('='): |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
261 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
262 # An action with no parameters: |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
263 DROP. |
| 1782 | 264 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
265 # An action with a parameter: |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
266 REPLY=Hello, this is a reply. |
| 1782 | 267 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
268 ### Route modification |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
269 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
270 The most common actions modify the stanza's route in some way. Currently |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
271 the first matching rule to do so will halt further processing of actions |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
272 and rules (this may change in the future). |
| 1782 | 273 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
274 Action Description |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
275 ----------------------- --------------------------------------------------------------------------------------------------------------------------------------------------------- |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
276 `PASS.` Stop executing actions and rules on this stanza, and let it through this chain. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
277 `DROP.` Stop executing actions and rules on this stanza, and discard it. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
278 `REDIRECT=jid` Redirect the stanza to the given JID. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
279 `REPLY=text` Reply to the stanza (assumed to be a message) with the given text. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
280 `BOUNCE.` Bounce the stanza with the default error (usually service-unavailable) |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
281 `BOUNCE=error` Bounce the stanza with the given error (MUST be a defined XMPP stanza error, see [RFC6120](http://xmpp.org/rfcs/rfc6120.html#stanzas-error-conditions). |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
282 `BOUNCE=error (text)` As above, but include the supplied human-readable text with a description of the error |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
283 `COPY=jid` Make a copy of the stanza and send the copy to the specified JID. |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
284 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
285 ### Stanza modification |
| 1782 | 286 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
287 These actions make it possible to modify the content and structure of a |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
288 stanza. |
| 1782 | 289 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
290 Action Description |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
291 ------------------------ ------------------------------------------------------------------------ |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
292 `STRIP=name` Remove any child elements with the given name in the default namespace |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
293 `STRIP=name namespace` Remove any child elements with the given name and the given namespace |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
294 `INJECT=xml` Inject the given XML into the stanza as a child element |
| 1782 | 295 |
|
1803
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
296 ### Informational |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
297 |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
298 Action Description |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
299 --------------- ------------------------------------------------------------------------------------------------------------------------ |
|
4d73a1a6ba68
Convert all wiki pages to Markdown
Kim Alvefur <zash@zash.se>
parents:
1782
diff
changeset
|
300 `LOG=message` Logs the given message to Prosody's log file. Optionally prefix it with a log level in square brackets, e.g. `[debug]` |