annotate mod_register_dnsbl_warn/mod_register_dnsbl_warn.lua @ 4877:adc6241e5d16

mod_measure_process: Report the enforced limit The soft limit is what the kernel actually enforces, while the hard limit is is how far you can change the soft limit without privileges. Unless the process dynamically adjusts the soft limit, knowing the hard limit is not as useful as knowing the soft limit. Reporting the soft limit and the number of in-use FDs allows placing alerts on expressions like 'process_open_fds / process_max_fds >= 0.95'
author Kim Alvefur <zash@zash.se>
date Tue, 18 Jan 2022 18:55:20 +0100
parents 76036fa34055
children
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0890c4860f14 mod_register_dnsbl: Initial commit of module to check users registering against an DNS block list
Kim Alvefur <zash@zash.se>
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1 local adns = require "net.adns";
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2 local rbl = module:get_option_string("registration_rbl");
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3
0890c4860f14 mod_register_dnsbl: Initial commit of module to check users registering against an DNS block list
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4 local function reverse(ip, suffix)
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76036fa34055 mod_register_dnsbl_*: fix DS legacy ipv4 addresses, thx Zash
Georg Lukas <georg@op-co.de>
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5 if ip:sub(1,7):lower() == "::ffff:" then
76036fa34055 mod_register_dnsbl_*: fix DS legacy ipv4 addresses, thx Zash
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6 ip = ip:sub(8);
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7 end
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42b095dab626 mod_register_dnsbl: Fix matching pattern (Thanks Ge0rG)
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8 local a,b,c,d = ip:match("^(%d+).(%d+).(%d+).(%d+)$");
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9 if not a then return end
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10 return ("%d.%d.%d.%d.%s"):format(d,c,b,a, suffix);
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11 end
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13 -- TODO async
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14 -- module:hook("user-registering", function (event) end);
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16 module:hook("user-registered", function (event)
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17 local session = event.session;
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18 local ip = session and session.ip;
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19 local rbl_ip = ip and reverse(ip, rbl);
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20 if rbl_ip then
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21 local log = session.log;
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22 adns.lookup(function (reply)
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23 if reply and reply[1] then
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2dcc3079572c mod_register_dnsbl: Include more information in log message
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24 log("warn", "Account %s@%s registered from IP %s found in RBL (%s)", event.username, event.host or module.host, ip, reply[1].a);
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25 end
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26 end, rbl_ip);
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27 end
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28 end);