nginx+lua下防护UA规则
文件：useragent.rule或user-agent目的：防恶意爬虫攻击、采集等。。。。大部分非正常用户访问行为常用版：
(HTTrack|Apache-HttpClient|harvest|audit|dirbuster|pangolin|nmap|sqln|hydra|Parser|libwww|BBBike|sqlmap|w3af|owasp|Nikto|fimap|havij|zmeu|BabyKrokodil|netsparker|httperf|bench| SF/)
高级版：
(Abonti|aggregator|AhrefsBot|asterias|BDCbot|BLEXBot|BuiltBotTough|Bullseye|BunnySlippers|ca-crawler|CCBot|Cegbfeieh|CheeseBot|CherryPicker|CopyRightCheck|cosmos|Crescent|discobot|DittoSpyder|DOC|DotBot|Download Ninja|EmailCollector|EmailSiphon|EmailWolf|EroCrawler|Exabot|ExtractorPro|Fasterfox|FeedBooster|Foobot|Genieo|grub-client|Harvest|hloader|httplib|humanlinks|ieautodiscovery|InfoNaviRobot|IstellaBot|Java1.|JennyBot|k2spider|Kenjin Spider|Keyword Density0.9|larbin|LexiBot|libWeb|libwww|LinkextractorPro|linko|LinkScan8.1a Unix|LinkWalker|LNSpiderguy|lwp-trivial|magpie|Mata Hari|MaxPointCrawler|MegaIndex|Microsoft URL Control|MIIxpc|Mippin|Missigua Locator|Mister PiX|MJ12bot|moget|MSIECrawler|NetAnts|NICErsPRO|Niki-Bot|NPBot|Nutch|Offline Explorer|Openfind|panscient.com|ProPowerBot2.14|ProWebWalker|Python-urllib|QueryN Metasearch|RepoMonkey|RMA|SemrushBot|SeznamBot|SISTRIX|sitecheck.Internetseer.com|SiteSnagger|SnapPreviewBot|Sogou|SpankBot|spanner|spbot|Spinn3r|suzuran|Szukacz1.4|Teleport|Telesoft|The Intraformant|TheNomad|TightTwatBot|Titan|True_Robot|turingos|TurnitinBot|UbiCrawler|UnisterBot|URLy Warning|VCI|WBSearchBot|Web Downloader6.9|WebAuto|WebBandit|WebCopier|WebEnhancer|WebmasterWorldForumBot|WebReaper|WebSauger|Website Quester|Webster Pro|WebStripper|WebZip|Wotbox|wsr-agent|WWW-Collector-E|Xenu|yandex|Zao|Zeus|ZyBORG|coccoc|Incutio|lmspider|memoryBot|SemrushBot|serf|Unknown|uptime files|HTTrack|Apache-HttpClient|harvest|audit|dirbuster|pangolin|nmap|sqln|hydra|Parser|libwww|BBBike|sqlmap|w3af|owasp|Nikto|fimap|havij|zmeu|FeedDemon|Indy Library|Alexa Toolbar|AskTbFXTV|AhrefsBot|CrawlDaddy|CoolpadWebkit|Java|Feedly|UniversalFeedParser|ApacheBench|Swiftbot|ZmEu|oBot|jaunty|Python-urllib|lightDeckReports Bot|YYSpider|DigExt|HttpClient|MJ12bot|heritrix|EasouSpider|Ezooms|BabyKrokodil|netsparker|httperf| SF/)
保存好后，替换文件。nginx -s reload 一次搞定
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