diff -r 66e05b1bbda2 -r 802f32be53bf data/dictionary.xml
--- a/data/dictionary.xml Wed Jun 24 22:00:50 2020 +0200
+++ b/data/dictionary.xml Mon Jul 06 22:43:15 2020 +0200
@@ -2084,6 +2084,64 @@
computer
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+ a list of elements that are not allowed or should be excluded;
+ the element might be e.g. IP address, e-mail address, regular expression, name pattern or name;
+ example 1: we do not accept e-mail messages from blacklisted IP addresses, because such IP addresses are known to send spam
+ example 2: blacklisted kernel modules are not loaded during the system start
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+ computer
+ security
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+ a list of elements that are allowed or should be included;
+ the element might be e.g. IP address, e-mail address, regular expression, name pattern or name;
+ example 1: connections from whitelisted IP addresses to the service are allowed, while connections from all other IP addresses are rejected;
+ example 2: connections from whitelisted IP addresses to the service are allowed, connections from blacklisted IP addresses are dropped (the will not get a any response) and connections from all other IP addresses are rejected (will get a negative response);
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+ computer
+ security
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+ a method of preventing e-mail spam;
+ 1) utilizes standard behavior of legitimate e-mail servers that tries to redeliver the message multiple times when a temporary error occurs
+ 2) expects that spammers are not going to redeliver in that case, because they are focused more on quantitiy than quality (few lost messages are not an issue for them);
+ MTA equiped with a greylisting filter will respond with a simulated temporary error to incomming messages from an unknown sender;
+ when the sender attempts to deliver the massage for the second time, the message will be accepted (if it is long enough after the first attempt);
+ this method is stateful which means that the MTA server needs to maintain a list of senders and their send attempts – this list is called greylist;
+ disadvantage of this method is that it causes delays in the e-mail delivery;
+ this disadvantage can be partially mitigated using a whitelist: trusted senders (domains or IP addresses) are put on the whitelist and do not have to wait even if they are sending the first message
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+ computer
+ messaging
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+