nginx过滤器漏洞（Nginx反爬虫策略，防止UA抓取网站）

vim /usr/www/server/nginx/conf/anti_spider.conf

#禁止Scrapy等工具的抓取 
if ($http_user_agent ~* (Scrapy|Curl|HttpClient)) { 
   return 403; 
} 
#禁止指定UA及UA为空的访问 
if ($http_user_agent ~ "WinHttp|WebZIP|FetchURL|node-superagent|java/|FeedDemon|Jullo|JikeSpider|Indy Library|Alexa Toolbar|AskTbFXTV|AhrefsBot|CrawlDaddy|Java|Feedly|Apache-HttpAsyncClient|UniversalFeedParser|ApacheBench|Microsoft URL Control|Swiftbot|ZmEu|oBot|jaunty|Python-urllib|lightDeckReports Bot|YYSpider|DigExt|HttpClient|MJ12bot|heritrix|EasouSpider|Ezooms|BOT/0.1|YandexBot|FlightDeckReports|Linguee Bot|^$" ) { 
   return 403;        
} 
#禁止非GET|HEAD|POST方式的抓取 
if ($request_method !~ ^(GET|HEAD|POST)$) { 
  return 403; 
}
#屏蔽单个IP的命令是
#deny 123.45.6.7
#封整个段即从123.0.0.1到123.255.255.254的命令
#deny 123.0.0.0/8
#封IP段即从123.45.0.1到123.45.255.254的命令
#deny 124.45.0.0/16
#封IP段即从123.45.6.1到123.45.6.254的命令是
#deny 123.45.6.0/24
# 以下IP皆为流氓
#deny 58.95.66.0/24;

# 反爬虫  
include /usr/www/server/nginx/conf/anti_spider.conf

λ curl -X GET -I -A 'YYSpider' https://www.myong.top
HTTP/1.1 200 Connection established
HTTP/2 403
server: marco/2.11
date: Fri, 20 Mar 2020 08:48:50 GMT
content-type: text/html
content-length: 146
x-source: C/403
x-request-id: 3ed800d296a12ebcddc4d61c57500aa2

λ curl -X GET -I -A 'BaiduSpider' https://www.myong.top
HTTP/1.1 200 Connection established
HTTP/2 200
server: marco/2.11
date: Fri, 20 Mar 2020 08:49:47 GMT
content-type: text/html
vary: Accept-Encoding
x-source: C/200
last-modified: Wed, 18 Mar 2020 13:16:50 GMT
etag: "5e721f42-150ce"
x-request-id: e82999a78b7d7ea2e9ff18b6f1f4cc84

FeedDemon       内容采集 
BOT/0.1 (BOT for JCE) sql注入 
CrawlDaddy      sql注入 
Java         内容采集 
Jullo         内容采集 
Feedly        内容采集 
UniversalFeedParser  内容采集 
ApacheBench      cc攻击器 
Swiftbot       无用爬虫 
YandexBot       无用爬虫 
AhrefsBot       无用爬虫 
YisouSpider      无用爬虫（已被UC神马搜索收购，此蜘蛛可以放开！） 
jikeSpider      无用爬虫 
MJ12bot        无用爬虫 
ZmEu phpmyadmin    漏洞扫描 
WinHttp        采集cc攻击 
EasouSpider      无用爬虫 
HttpClient      tcp攻击 
Microsoft URL Control 扫描 
YYSpider       无用爬虫 
jaunty        wordpress爆破扫描器 
oBot         无用爬虫 
Python-urllib     内容采集 
Indy Library     扫描 
FlightDeckReports Bot 无用爬虫 
Linguee Bot      无用爬虫