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<title> [筆記]fail2ban 阻擋sasl登入失敗的正規化語法 | My cool new Blog</title>
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<a class="bubble" href="/article/e7-ad-86-e8-a8-98fail2ban-e9-98-bb-e6-93-8bsasl-e7-99-bb-e5-85-a5-e5-a4-b1-e6-95-97-e7-9a-84-e6-ad-a3-e8-a6-8f-e5-8c-96-e8-aa-9e-e6-b3-95/">
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<h3><a href="/article/e7-ad-86-e8-a8-98fail2ban-e9-98-bb-e6-93-8bsasl-e7-99-bb-e5-85-a5-e5-a4-b1-e6-95-97-e7-9a-84-e6-ad-a3-e8-a6-8f-e5-8c-96-e8-aa-9e-e6-b3-95/">[筆記]fail2ban 阻擋sasl登入失敗的正規化語法</a></h3>
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<div class="meta">
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<span class="date moment">2013-10-16</span>
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<a href="/categories/%E5%B7%A5%E4%BD%9C%E7%AD%86%E8%A8%98">工作筆記</a>
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<p>一直以來都找不到fail2ban 去阻擋SASL認證失敗的語法，網路上之前看到的都是這幾篇</p>
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<p><a href="http://blog.xuite.net/pippeng/blog/63675336-Fail2Ban+for+Dovecot%3E">http://blog.xuite.net/pippeng/blog/63675336-Fail2Ban+for+Dovecot%3E</a></p>
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<p><a href="http://wiki.dovecot.org/HowTo/Fail2Ban">http://wiki.dovecot.org/HowTo/Fail2Ban</a></p>
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<p>今天驚覺其實是我想錯了，這個應該不關dovecot的事！</p>
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<p>應該是要找SASL認證錯誤的語法才對</p>
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<p>不過dovecot預設的好像也有問題</p>
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<p>所以我找到了這篇</p>
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<p><a href="http://www.howtoforge.com/forums/showthread.php?t=51349">http://www.howtoforge.com/forums/showthread.php?t=51349</a></p>
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<p>發現了這個語法
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> <pre dir="ltr">failregex = (?i): warning: [-.<em>\w]+[<HOST>]: SASL (?:LOGIN|PLAIN|(?:CRAM|DIGEST)-MD5) authentication failed: \w</pre>
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然後測試了一下
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> Running tests
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>
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> =============
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>
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>
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> Use regex file : /etc/fail2ban/filter.d/dovecot-pop3imap.conf
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>
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> Use log file : /var/log/maillog
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>
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> Results
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>
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> =======
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>
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>
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> Failregex
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>
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> |- Regular expressions:
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>
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> | <a href="?i">1</a>: warning: [-.</em>\w]+[<HOST>]: SASL (?:LOGIN|PLAIN|(?:CRAM|DIGEST)-MD5) authentication failed: \w
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>
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> |
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>
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> <code>- Number of matches:
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>
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> [1] 450 match(es)
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>
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>
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> Ignoreregex
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>
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> |- Regular expressions:
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>
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> |
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>
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></code>- Number of matches:
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>
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>
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> Summary
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>
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> =======
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>
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>
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> Addresses found:
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>
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> [1]
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>
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> 199.36.73.98 (Wed Oct 16 01:30:56 2013)
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>
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>
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>
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>
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>
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> 中間省略數百筆
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>
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>
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> 223.198.165.194 (Wed Oct 16 01:47:37 2013)
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>
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>
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> 再次省略數百筆
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>
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>
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> 113.59.11.87 (Wed Oct 16 03:47:28 2013)
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>
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>
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> 省略數百筆
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>
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>
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> 114.250.15.84 (Wed Oct 16 10:51:30 2013)
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>
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>
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> 省略數百筆
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</p>
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<p>接下來就放著讓fail2ban 去跑跑看囉！</p>
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var client = algoliasearch("Y2C4RWMPXW", "50ea7f8c41c0ad233926e0be2b769ed1");
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var index = client.initIndex("default-content");
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$('#search').autocomplete({ hint: false, autoselect: true, debug: false },
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[
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{
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source: $.fn.autocomplete.sources.hits(index, { hitsPerPage: 5, filters: 'language: en' }),
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displayKey: function(suggestion) {
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return suggestion.title || suggestion.author
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},
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templates: {
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suggestion: function(suggestion) {
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return "<span class='entry " + suggestion.type + "'>"
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+ "<span class='title'>" + suggestion.title + "</span>"
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+ "<span class='fa fa-fw " + suggestion.iconClass + "'></span>"
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+ "</span>"
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;
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},
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empty: function() {
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return "<span class='empty'>Nothing found.</span>"
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},
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footer: function() {
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return '<div class="branding">Powered by <img src="https:\/\/h.cowbay.org\/dist\/algolia-logo-light.svg" /></div>'
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}
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},
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}
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])
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.on('autocomplete:selected', function(event, suggestion, dataset) {
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window.location = (suggestion.url);
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})
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.keypress(function (event, suggestion) {
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if (event.which == 13) {
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window.location = (suggestion.url);
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}
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});
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</script>
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</body>
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</html>
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