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ModSecurity IIS 通过 X-Forwarded-For 阻止国外 IP

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ModSecurity IIS 通过 X-Forwarded-For 阻止国外 IP

问题

有人试图使用随机恶意 URL 来抓取我们的网站（至今已有大约 12 个小时）。

这是日志文件

2016-06-29 08:17:02 10.X.X.X GET /assets/plugins/lightbox/Images/url - 443 - 10.X.X.X Mozilla/5.0+(X11;+Ubuntu;+Linux+x86_64;+rv:47.0)+Gecko/20100101+Firefox/47.0 - 302 0 2 0 212.83.40.238
2016-06-29 08:17:02 10.X.X.X GET /assets/plugins/lightbox/Images/urlrewriter - 443 - 10.X.X.X Mozilla/5.0+(X11;+Ubuntu;+Linux+x86_64;+rv:47.0)+Gecko/20100101+Firefox/47.0 - 302 0 2 15 212.83.40.238
2016-06-29 08:17:02 10.X.X.X GET /assets/plugins/lightbox/Images/urls - 443 - 10.X.X.X Mozilla/5.0+(X11;+Ubuntu;+Linux+x86_64;+rv:47.0)+Gecko/20100101+Firefox/47.0 - 302 0 2 0 212.83.40.238
2016-06-29 08:17:03 10.X.X.X GET /assets/plugins/lightbox/Images/US - 443 - 10.X.X.X Mozilla/5.0+(X11;+Ubuntu;+Linux+x86_64;+rv:47.0)+Gecko/20100101+Firefox/47.0 - 302 0 2 0 212.83.40.238
2016-06-29 08:17:03 10.X.X.X GET /assets/plugins/lightbox/Images/usa - 443 - 10.X.X.X Mozilla/5.0+(X11;+Ubuntu;+Linux+x86_64;+rv:47.0)+Gecko/20100101+Firefox/47.0 - 302 0 2 0 212.83.40.238
2016-06-29 08:17:03 10.X.X.X GET /assets/plugins/lightbox/Images/us - 443 - 10.X.X.X Mozilla/5.0+(X11;+Ubuntu;+Linux+x86_64;+rv:47.0)+Gecko/20100101+Firefox/47.0 - 302 0 2 0 212.83.40.238
2016-06-29 08:17:04 10.X.X.X GET /assets/plugins/lightbox/Images/user - 443 - 10.X.X.X Mozilla/5.0+(X11;+Ubuntu;+Linux+x86_64;+rv:47.0)+Gecko/20100101+Firefox/47.0 - 302 0 2 0 212.83.40.238
2016-06-29 08:17:04 10.X.X.X GET /assets/plugins/lightbox/Images/usage - 443 - 10.X.X.X Mozilla/5.0+(X11;+Ubuntu;+Linux+x86_64;+rv:47.0)+Gecko/20100101+Firefox/47.0 - 302 0 2 15 212.83.40.238
2016-06-29 08:17:04 10.X.X.X GET /assets/plugins/lightbox/Images/user_upload - 443 - 10.X.X.X Mozilla/5.0+(X11;+Ubuntu;+Linux+x86_64;+rv:47.0)+Gecko/20100101+Firefox/47.0 - 302 0 2 0 212.83.40.238

因此我安装了 ModSecurity，并开始使用experimental_rules\modsecurity_crs_11_proxy_abuse.conf 文件，因为它似乎最接近我需要的。

问题是使用“@geoLookup”进行查找使用的是 REMOTE_ADDR，它始终与我的 AWS Elastic Load Balancer（内部 10.xxx）相同。我如何根据 X-Forwarded-For IP（这始终存在于 AWS Elastic Load Balancer 中）执行“@geoLookup”？

这是我目前所拥有的

SecGeoLookupDb GeoLiteCity.dat
SecRule REQUEST_HEADERS:X-Forwarded-For "^\b\d{1,3}(?<!192|127|10)\.\d{1,3}\.\d{1,3}\.\d{1,3}\b" "chain,phase:1,id:'992210',t:none,capture,block,rev:'2.2.9',msg:'Potential Open Proxy Abuse - GeoIP Country Code Mismatch of X-Forwarded-For Request Header and Client REMOTE_ADDR',logdata:'IP Country is: %{geo.country_code} and X-Forwarded-For is: %{tx.geo_x-forwarded-for}'"
        SecRule TX:0 "@geoLookup" "chain,setvar:tx.geo_x-forwarded-for=%{geo.country_code},setvar:tx."
                SecRule REMOTE_ADDR "@geoLookup" "chain,t:none"
                        SecRule GEO:COUNTRY_CODE "!@streq %{tx.geo_x-forwarded-for}" "setvar:'tx.msg=%{rule.msg}',setvar:tx.anomaly_score=+%{tx.warning_anomaly_score},setvar:tx.automation_score=+%{tx.warning_anomaly_score},setvar:tx.%{rule.id}-AUTOMATION/MALICIOUS-%{matched_var_name}=%{matched_var}"
                            SecRule GEO:COUNTRY_CODE3 "!@streq USA" "id:'992211',phase:1,t:none,log,deny,msg:'Client IP not from USA'"

但我觉得我对这种奇怪的语言还没有有足够的了解，因为我昨晚从 12 点到凌晨 4 点一直在研究这个问题，我的大脑很痛。

答案1

他们说得对，午夜后不会有什么好事发生。

如果其他人需要，这里是解决方案：

SecGeoLookupDb GeoLiteCity.dat
SecRule REQUEST_HEADERS:X-FORWARDED-FOR "@geoLookup" "id:'992210',phase:1,t:none,pass,nolog"
SecRule GEO:COUNTRY_CODE3 "!@streq USA" "id:'992211',phase:1,t:none,log,deny,msg:'Client IP not from USA'"

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