[security][modsecurity][nginx] nginx 与 modsecurity
参考文档：
https://github.com/SpiderLabs/ModSecurity/wiki/Reference-Manual#installation-for-nginx
nginx不支持动态加载模块，所以需要重新编译，将modsecurity和nginx整合。
一： 软件准备：
ModSecurity-2.9.1.zip
nginx-1.10.1.tar.gz
根据文档所述，有一些依赖包需要安装。
yum install httpd httpd-devel pcre pcre-devel libxml2-devel
二， 编译安装：
从 2.6开始，modsecurity的编译方式发生了调整。参考：
https://github.com/SpiderLabs/ModSecurity/wiki/Reference-Manual#GitHub_Access
[root@dpdk ModSecurity-2.9.]# ./autogen.sh
[root@dpdk ModSecurity-2.9.1]# ./configure --enable-standalone-module --disable-mlogc
[root@dpdk ModSecurity-2.9.]# make
编译nginx
[root@dpdk nginx-1.10.]# ./configure --prefix=/root/modsecurity/output --add-module=../ModSecurity-2.9./nginx/modsecurity/
[root@dpdk nginx-1.10.1]# make
[root@dpdk nginx-1.10.1]# make install
三， 运行nginx
1. 修改配置文件，conf/nginx.conf， 增加如下行：
user root;
2. 使用如下命令启动/停止：
[root@dpdk output]# ./sbin/nginx -c conf/nginx.conf
[root@dpdk output]# ./sbin/nginx -s stop
四，配置modsecurity
已经在nginx中设置了两个监听端口80,81,分别对应于两个静态页。
[root@dpdk conf]# cat nginx.conf user root;
worker_processes ; #error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info; #pid logs/nginx.pid; events {
worker_connections ;
} http {
include mime.types;
default_type application/octet-stream; #log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"'; #access_log logs/access.log main; sendfile on;
#tcp_nopush on; #keepalive_timeout ;
keepalive_timeout ; #gzip on; include custom.conf;
include mod.conf; server {
listen ;
server_name localhost; #charset koi8-r; #access_log logs/host.access.log main; location / {
root html;
index index.html index.htm;
} #error_page /.html; # redirect server error pages to the static page /50x.html
#
error_page /50x.html;
location = /50x.html {
root html;
} # proxy the PHP scripts to Apache listening on 127.0.0.1:
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#} # pass the PHP scripts to FastCGI server listening on 127.0.0.1:
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#} # deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
} # another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen ;
# listen somename:;
# server_name somename alias another.alias; # location / {
# root html;
# index index.html index.htm;
# }
#} # HTTPS server
#
#server {
# listen ssl;
# server_name localhost; # ssl_certificate cert.pem;
# ssl_certificate_key cert.key; # ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 5m; # ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on; # location / {
# root html;
# index index.html index.htm;
# }
#} }
nginx.conf
[root@dpdk conf]# cat custom.conf
server {
listen ;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
#error_page /.html;
# redirect server error pages to the static page /50x.html
#
error_page /50x.html;
location = /50x.html {
root html;
}
}
custom.conf
增加配置文件 mod.conf 监听于端口82
[root@dpdk conf]# cat mod.conf
server {
listen ;
server_name localhost;
location / {
ModSecurityEnabled on;
ModSecurityConfig modsecurity.conf;
proxy_pass http://127.0.0.1:81;
proxy_read_timeout 180s;
}
}
[root@dpdk conf]#
其中引用了两个配置文件，模板如下：
https://raw.githubusercontent.com/SpiderLabs/ModSecurity/master/modsecurity.conf-recommended
https://raw.githubusercontent.com/SpiderLabs/ModSecurity/master/unicode.mapping
五： 规则/语法/配置
文档：
https://www.feistyduck.com/library/modsecurity-handbook-free/online/
Everything in ModSecurity revolves around two things: configuration and rules.
The configuration tells ModSecurity how to process the data it sees;
the rules decide what to do with the processed data.
For example: SecRule ARGS "<script>" log,deny,status:
Even without further assistance, you can probably recognize the part in the rule that specifies what we wish to look for in input data (<script>). Similarly, you will easily figure out what will happen if we do find the desired pattern (log,deny,status:). Things will become more clear if I tell you about the general rule syntax, which is the following: SecRule VARIABLES OPERATOR ACTIONS
The three parts have the following meanings: The VARIABLES part tells ModSecurity where to look. The ARGS variable, used in the example, means all request parameters.
The OPERATOR part tells ModSecurity how to look. In the example, we have a regular expression pattern, which will be matched against ARGS.
The ACTIONS part tells ModSecurity what to do on a match. The rule in the example gives three instructions: log problem, deny transaction and use the status for the denial (status:).
For Example
手册：
https://github.com/SpiderLabs/ModSecurity/wiki/Reference-Manual
第三方规则：
OWASP: https://www.owasp.org/index.php/Main_Page
Core Rules: https://www.owasp.org/index.php/Category:OWASP_ModSecurity_Core_Rule_Set_Project
例子里有大量的注释，很适合学习：
/home/tong/Src/thirdparty/github/owasp-modsecurity-crs [git::v3.0/master]/crs-setup.conf.example
5.1 精读 Reference-Manual
要想细致理解，必须精读一遍。
5.2 精读429条项目规则
六： 在Nginx中使用与测试
如第四小节内容所示，将82端口配置成modsecurity，并重定向至81端口。然而并不好使。。。
设置 ModSecurityEnabled Off;
修改 mod/conf 的内容，将 127.0.0.1 改为 localhost。 重定向成功。打开了81所指向的页。
再修改为 proxy_pass http://192.168.10.209; 也可以成功。
说明也许是ModSecurity设置的问题。
6.1 做一个最简单的modsecurity配置
[root@dpdk output]# cat conf/mymod.conf
SecRuleEngine DetectionOnly
SecRequestBodyAccess On
SecResponseBodyAccess On SecDebugLogLevel
SecDebugLog /root/modsecurity/output/logs/modsec_debug.log SecAuditEngine On
SecAuditLogType Serial
SecAuditLog /root/modsecurity/output/logs/modsec_audit.log
[root@dpdk output]#
现象不变。
可以modsec_debug.log中有如下打印信息：
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Initialising transaction (txid @cAcAcAcAcAAAcAcAcAcSGuc).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Transaction context created (dcfg 23ce7b8).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Starting phase REQUEST_HEADERS.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Second phase starting (dcfg 23ce7b8).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Input filter: This request does not have a body.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Starting phase REQUEST_BODY.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Hook insert_filter: Adding output filter (r 23b91e0).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Output filter: Receiving output (f 23ba430, r 23b91e0).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Starting phase RESPONSE_HEADERS.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Content Injection: Not enabled.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Output filter: Bucket type POOL contains bytes.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Output filter: Bucket type EOS contains bytes.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Output filter: Completed receiving response body (buffered full - bytes).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Starting phase RESPONSE_BODY.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Output filter: Output forwarding complete.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Initialising transaction (txid AcizPcAcAc8c3gAcAcO@AcAc).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Transaction context created (dcfg 23ce7b8).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Starting phase REQUEST_HEADERS.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Second phase starting (dcfg 23ce7b8).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Input filter: This request does not have a body.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Starting phase REQUEST_BODY.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Hook insert_filter: Adding output filter (r 23b91e0).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Output filter: Receiving output (f 23ba430, r 23b91e0).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Starting phase RESPONSE_HEADERS.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Content Injection: Not enabled.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Output filter: Bucket type POOL contains bytes.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Output filter: Bucket type EOS contains bytes.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Output filter: Completed receiving response body (buffered full - bytes).
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Starting phase RESPONSE_BODY.
[/Jun/::: +] [/sid#23cdee0][rid#23b91e0][/][] Output filter: Output forwarding complete.
以及error.log
// :: [alert] #: worker process exited on signal
// :: [alert] #: worker process exited on signal
// :: [alert] #: worker process exited on signal
使用 curl 访问，显示server没有返回任何数据
/home/tong/Temp [tong@T7] [:]
> curl 192.168.7.4:
curl: () Empty reply from server
6.2 启用nginx debug
参考 man nginx
DEBUGGING LOG
To enable a debugging log, reconfigure nginx to build with debugging: ./configure --with-debug ... and then set the debug level of the error_log: error_log /path/to/log debug; It is also possible to enable the debugging for a particular IP address: events {
debug_connection 127.0.0.1;
}
[root@dpdk nginx-1.10.]# ./configure --prefix=/root/modsecurity/output --add-module=../ModSecurity-2.9./nginx/modsecurity/
--with-debug
[root@dpdk nginx-1.10.]# make
[root@dpdk nginx-1.10.]# make install
配置里加一行
error_log logs/error.log debug;
在次使用curl访问，日志如下
// :: [debug] #: epoll: fd: ev: d:00007FAB90C6D0E8
// :: [debug] #: accept on 0.0.0.0:, ready:
// :: [debug] #: posix_memalign: : @
// :: [debug] #: * accept: 192.168.7.1: fd:
// :: [debug] #: * event timer add: : :
// :: [debug] #: * reusable connection:
// :: [debug] #: * epoll add event: fd: op: ev:
// :: [debug] #: timer delta:
// :: [debug] #: worker cycle
// :: [debug] #: epoll timer:
// :: [debug] #: epoll: fd: ev: d:00007FAB90C6D370
// :: [debug] #: * http wait request handler
// :: [debug] #: * malloc: 00000000016410C0:
// :: [debug] #: * recv: fd: of
// :: [debug] #: * reusable connection:
// :: [debug] #: * posix_memalign: 00000000016414D0: @
// :: [debug] #: * http process request line
// :: [debug] #: * http request line: "GET / HTTP/1.1"
// :: [debug] #: * http uri: "/"
// :: [debug] #: * http args: ""
// :: [debug] #: * http exten: ""
// :: [debug] #: * http process request header line
// :: [debug] #: * http header: "Host: 192.168.7.4:82"
// :: [debug] #: * http header: "User-Agent: curl/7.54.1"
// :: [debug] #: * http header: "Accept: */*"
// :: [debug] #: * http header done
// :: [debug] #: * event timer del: :
// :: [debug] #: * rewrite phase:
// :: [debug] #: * test location: "/"
// :: [debug] #: * using configuration "/"
// :: [debug] #: * http cl:- max:
// :: [debug] #: * rewrite phase:
// :: [debug] #: * post rewrite phase:
// :: [debug] #: * generic phase:
// :: [debug] #: * modSecurity: handler
// :: [debug] #: * add cleanup: 00000000016423E0
// :: [debug] #: * posix_memalign: : @
// :: [debug] #: * add cleanup:
// :: [debug] #: * ModSecurity: load headers in: "Host: 192.168.7.4:82"
// :: [debug] #: * ModSecurity: load headers in: "User-Agent: curl/7.54.1"
// :: [debug] #: * ModSecurity: load headers in: "Accept: */*"
// :: [debug] #: * ModSecurity: load headers in done
// :: [debug] #: * ModSecurity: status -
// :: [debug] #: * generic phase:
// :: [debug] #: * generic phase:
// :: [debug] #: * access phase:
// :: [debug] #: * access phase:
// :: [debug] #: * post access phase:
// :: [debug] #: * http init upstream, client timer:
// :: [debug] #: * epoll add event: fd: op: ev:
// :: [debug] #: * http script copy: "Host: "
// :: [debug] #: * http script var: "localhost:81"
// :: [debug] #: * http script copy: "
"
// :: [debug] #: * http script copy: "Connection: close
"
// :: [debug] #: * http script copy: ""
// :: [debug] #: * http script copy: ""
// :: [debug] #: * http script copy: ""
// :: [debug] #: * http script copy: ""
// :: [debug] #: * http proxy header: "User-Agent: curl/7.54.1"
// :: [debug] #: * http proxy header: "Accept: */*"
// :: [debug] #: * http proxy header:
"GET / HTTP/1.0
Host: localhost:
Connection: close
User-Agent: curl/7.54.
Accept: */* "
2017/06/22 10:52:52 [debug] 5474#0: *1 http cleanup add: 0000000001635928
2017/06/22 10:52:52 [debug] 5474#0: *1 get rr peer, try: 2
2017/06/22 10:52:52 [debug] 5474#0: *1 get rr peer, current: 000000000166BAD0 -1
2017/06/22 10:52:52 [debug] 5474#0: *1 stream socket 14
2017/06/22 10:52:52 [debug] 5474#0: *1 epoll add connection: fd:14 ev:80002005
2017/06/22 10:52:52 [debug] 5474#0: *1 connect to 127.0.0.1:81, fd:14 #2
2017/06/22 10:52:52 [debug] 5474#0: *1 http upstream connect: -2
2017/06/22 10:52:52 [debug] 5474#0: *1 posix_memalign: 0000000001674AE0:128 @16
2017/06/22 10:52:52 [debug] 5474#0: *1 event timer add: 14: 60000:1498100032928
2017/06/22 10:52:52 [debug] 5474#0: *1 http finalize request: -4, "/?" a:1, c:2
2017/06/22 10:52:52 [debug] 5474#0: *1 http request count:2 blk:0
2017/06/22 10:52:52 [debug] 5474#0: timer delta: 0
2017/06/22 10:52:52 [debug] 5474#0: worker cycle
2017/06/22 10:52:52 [debug] 5474#0: epoll timer: 60000
2017/06/22 10:52:52 [debug] 5474#0: epoll: fd:3 ev:0004 d:00007FAB90C6D370
2017/06/22 10:52:52 [debug] 5474#0: *1 http run request: "/?"
2017/06/22 10:52:52 [debug] 5474#0: *1 http upstream check client, write event:1, "/"
2017/06/22 10:52:52 [debug] 5474#0: *1 http upstream recv(): -1 (11: Resource temporarily unavailable)
2017/06/22 10:52:52 [debug] 5474#0: epoll: fd:14 ev:0004 d:00007FAB90C6D448
2017/06/22 10:52:52 [debug] 5474#0: *1 http upstream request: "/?"
2017/06/22 10:52:52 [debug] 5474#0: *1 http upstream send request handler
2017/06/22 10:52:52 [debug] 5474#0: *1 http upstream send request
2017/06/22 10:52:52 [debug] 5474#0: *1 http upstream send request body
2017/06/22 10:52:52 [debug] 5474#0: *1 chain writer buf fl:1 s:95
2017/06/22 10:52:52 [debug] 5474#0: *1 chain writer in: 0000000001635960
2017/06/22 10:52:52 [debug] 5474#0: *1 writev: 95 of 95
2017/06/22 10:52:52 [debug] 5474#0: *1 chain writer out: 0000000000000000
2017/06/22 10:52:52 [debug] 5474#0: *1 event timer del: 14: 1498100032928
2017/06/22 10:52:52 [debug] 5474#0: *1 event timer add: 14: 180000:1498100152928
2017/06/22 10:52:52 [debug] 5474#0: epoll: fd:6 ev:0001 d:00007FAB90C6D010
2017/06/22 10:52:52 [debug] 5474#0: accept on 0.0.0.0:81, ready: 0
2017/06/22 10:52:52 [debug] 5474#0: posix_memalign: 0000000001674B70:512 @16
2017/06/22 10:52:52 [debug] 5474#0: *3 accept: 127.0.0.1:36900 fd:15
2017/06/22 10:52:52 [debug] 5474#0: *3 event timer add: 15: 60000:1498100032928
2017/06/22 10:52:52 [debug] 5474#0: *3 reusable connection: 1
2017/06/22 10:52:52 [debug] 5474#0: *3 epoll add event: fd:15 op:1 ev:80002001
2017/06/22 10:52:52 [debug] 5474#0: timer delta: 0
2017/06/22 10:52:52 [debug] 5474#0: worker cycle
2017/06/22 10:52:52 [debug] 5474#0: epoll timer: 60000
2017/06/22 10:52:52 [debug] 5474#0: epoll: fd:15 ev:0001 d:00007FAB90C6D520
2017/06/22 10:52:52 [debug] 5474#0: *3 http wait request handler
2017/06/22 10:52:52 [debug] 5474#0: *3 malloc: 00000000016424E0:1024
2017/06/22 10:52:52 [debug] 5474#0: *3 recv: fd:15 95 of 1024
2017/06/22 10:52:52 [debug] 5474#0: *3 reusable connection: 0
2017/06/22 10:52:52 [debug] 5474#0: *3 posix_memalign: 0000000001638140:4096 @16
2017/06/22 10:52:52 [debug] 5474#0: *3 http process request line
2017/06/22 10:52:52 [debug] 5474#0: *3 http request line: "GET / HTTP/1.0"
2017/06/22 10:52:52 [debug] 5474#0: *3 http uri: "/"
2017/06/22 10:52:52 [debug] 5474#0: *3 http args: ""
2017/06/22 10:52:52 [debug] 5474#0: *3 http exten: ""
2017/06/22 10:52:52 [debug] 5474#0: *3 http process request header line
2017/06/22 10:52:52 [debug] 5474#0: *3 http header: "Host: localhost:81"
2017/06/22 10:52:52 [debug] 5474#0: *3 http header: "Connection: close"
2017/06/22 10:52:52 [debug] 5474#0: *3 http header: "User-Agent: curl/7.54.1"
2017/06/22 10:52:52 [debug] 5474#0: *3 http header: "Accept: */*"
// :: [debug] #: * http header done
// :: [debug] #: * event timer del: :
// :: [debug] #: * rewrite phase:
// :: [debug] #: * test location: "/"
// :: [debug] #: * using configuration "/"
// :: [debug] #: * http cl:- max:
// :: [debug] #: * rewrite phase:
// :: [debug] #: * post rewrite phase:
// :: [debug] #: * generic phase:
// :: [debug] #: * generic phase:
// :: [debug] #: * generic phase:
// :: [debug] #: * access phase:
// :: [debug] #: * access phase:
// :: [debug] #: * post access phase:
// :: [debug] #: * content phase:
// :: [debug] #: * open index "/root/modsecurity/output/html/index.html"
// :: [debug] #: * internal redirect: "/index.html?"
// :: [debug] #: * rewrite phase:
// :: [debug] #: * test location: "/"
// :: [debug] #: * test location: "50x.html"
// :: [debug] #: * using configuration "/"
// :: [debug] #: * http cl:- max:
// :: [debug] #: * rewrite phase:
// :: [debug] #: * post rewrite phase:
// :: [debug] #: * generic phase:
// :: [debug] #: * generic phase:
// :: [debug] #: * generic phase:
// :: [debug] #: * access phase:
// :: [debug] #: * access phase:
// :: [debug] #: * post access phase:
// :: [debug] #: * content phase:
// :: [debug] #: * content phase:
// :: [debug] #: * content phase:
// :: [debug] #: * http filename: "/root/modsecurity/output/html/index.html"
// :: [debug] #: * add cleanup:
// :: [debug] #: * http static fd:
// :: [debug] #: * http set discard body
// :: [debug] #: * posix_memalign: 00000000016ABEA0: @
// :: [debug] #: * HTTP/1.1 OK
Server: nginx/1.10.
Date: Thu, Jun :: GMT
Content-Type: text/html
Content-Length:
Last-Modified: Tue, Jun :: GMT
Connection: close
ETag: "593f61d6-264"
Accept-Ranges: bytes // :: [debug] #: * write new buf t: f: 00000000016ABFD8, pos 00000000016ABFD8, size: file: , size:
// :: [debug] #: * http write filter: l: f: s:
// :: [debug] #: * http output filter "/index.html?"
// :: [debug] #: * http copy filter: "/index.html?"
// :: [debug] #: * http postpone filter "/index.html?" 00007FFE272AE960
// :: [debug] #: * write old buf t: f: 00000000016ABFD8, pos 00000000016ABFD8, size: file: , size:
// :: [debug] #: * write new buf t: f: , pos , size: file: , size:
// :: [debug] #: * http write filter: l: f: s:
// :: [debug] #: * http write filter limit
// :: [debug] #: * writev: of
// :: [debug] #: * sendfile: @
// :: [debug] #: * sendfile: of @
// :: [debug] #: * http write filter
// :: [debug] #: * http copy filter: "/index.html?"
// :: [debug] #: * http finalize request: , "/index.html?" a:, c:
// :: [debug] #: * http request count: blk:
// :: [debug] #: * http finalize request: -, "/index.html?" a:, c:
// :: [debug] #: * event timer add: : :
// :: [debug] #: * http lingering close handler
// :: [debug] #: * recv: fd: - of
// :: [debug] #: * recv() not ready (: Resource temporarily unavailable)
// :: [debug] #: * lingering read: -
// :: [debug] #: * event timer: , old: , new:
// :: [debug] #: timer delta:
// :: [debug] #: worker cycle
// :: [debug] #: epoll timer:
// :: [debug] #: epoll: fd: ev: d:00007FAB90C6D448
// :: [debug] #: * http upstream request: "/?"
// :: [debug] #: * http upstream process header
// :: [debug] #: * malloc: 00000000016ACEB0:
// :: [debug] #: * recv: fd: of
// :: [debug] #: * http proxy status "200 OK"
// :: [debug] #: * http proxy header: "Server: nginx/1.10.1"
// :: [debug] #: * http proxy header: "Date: Thu, 22 Jun 2017 02:52:52 GMT"
// :: [debug] #: * http proxy header: "Content-Type: text/html"
// :: [debug] #: * http proxy header: "Content-Length: 612"
// :: [debug] #: * http proxy header: "Last-Modified: Tue, 13 Jun 2017 03:53:58 GMT"
// :: [debug] #: * http proxy header: "Connection: close"
// :: [debug] #: * http proxy header: "ETag: "593f61d6-""
// :: [debug] #: * http proxy header: "Accept-Ranges: bytes"
// :: [debug] #: * http proxy header done
// :: [debug] #: * modSecurity: header filter
// :: [debug] #: * http cacheable:
// :: [debug] #: * http proxy filter init s: h: c: l:
// :: [debug] #: * http upstream process upstream
// :: [debug] #: * pipe read upstream:
// :: [debug] #: * pipe preread:
// :: [debug] #: * readv: , last:
// :: [debug] #: * pipe recv chain:
// :: [debug] #: * pipe buf free s: t: f: 00000000016ACEB0, pos 00000000016ACF99, size: file: , size:
// :: [debug] #: * pipe length:
// :: [debug] #: * input buf #
// :: [debug] #: * pipe write downstream:
// :: [debug] #: * pipe write downstream flush in
// :: [debug] #: * http output filter "/?"
// :: [debug] #: * http copy filter: "/?"
// :: [debug] #: * modSecurity: body filter
// :: [debug] #: * http copy filter: - "/?"
// :: [debug] #: * pipe write downstream done
// :: [debug] #: * event timer: , old: , new:
// :: [debug] #: * http upstream exit:
// :: [debug] #: * finalize http upstream request:
// :: [debug] #: * finalize http proxy request
// :: [debug] #: * free rr peer
// :: [debug] #: * close http upstream connection:
// :: [debug] #: * free: 0000000001674AE0, unused:
// :: [debug] #: * event timer del: :
// :: [debug] #: * reusable connection:
// :: [debug] #: * http upstream temp fd: -
// :: [debug] #: * http output filter "/?"
// :: [debug] #: * http copy filter: "/?"
// :: [debug] #: * modSecurity: body filter
// :: [debug] #: * ModSecurity: load headers in: "Host: 192.168.7.4:82"
// :: [debug] #: * ModSecurity: load headers in: "User-Agent: curl/7.54.1"
// :: [debug] #: * ModSecurity: load headers in: "Accept: */*"
// :: [debug] #: * ModSecurity: load headers in done
// :: [debug] #: * ModSecurity: load headers out: "Last-Modified: Tue, 13 Jun 2017 03:53:58 GMT"
// :: [debug] #: * ModSecurity: load headers out: "ETag: "593f61d6-""
// :: [debug] #: * ModSecurity: load headers out: "Accept-Ranges: bytes"
// :: [debug] #: * ModSecurity: load headers out: "Content-Type: text/html"
// :: [debug] #: * ModSecurity: load headers out: "Content-Length: 612"
// :: [debug] #: * ModSecurity: load headers out: "Last-Modified: Tue, 13 Jun 2017 03:53:58 GMT"
// :: [debug] #: * ModSecurity: load headers out: "Connection: keep-alive"
// :: [debug] #: * ModSecurity: load headers out done
// :: [debug] #: * ModSecurity: status -
// :: [debug] #: * posix_memalign: 00000000016ADEC0: @
// :: [debug] #: * ModSecurity: save headers in: "Host: 192.168.7.4:82"
// :: [debug] #: * ModSecurity: save headers in: "User-Agent: curl/7.54.1"
// :: [debug] #: * ModSecurity: save headers in: "Accept: */*"
// :: [debug] #: * ModSecurity: save headers in done
// :: [debug] #: * ModSecurity: save headers out: "Last-Modified: Tue, 13 Jun 2017 03:53:58 GMT"
// :: [debug] #: * ModSecurity: save headers out: "ETag: "593f61d6-""
// :: [notice] #: signal (SIGCHLD) received
// :: [alert] #: worker process exited on signal
// :: [debug] #: shmtx forced unlock
// :: [debug] #: wake up, sigio
// :: [debug] #: reap children
// :: [debug] #: child: e: t: d: r: j:
// :: [debug] #: channel :
// :: [notice] #: start worker process
// :: [debug] #: sigsuspend
// :: [debug] #: notify eventfd:
// :: [debug] #: malloc: 000000000163F8B0:
// :: [debug] #: malloc: 00007FAB90C6D010:
// :: [debug] #: malloc: 0000000001677E60:
// :: [debug] #: malloc: 000000000168FE70:
// :: [debug] #: epoll add event: fd: op: ev:
// :: [debug] #: epoll add event: fd: op: ev:
// :: [debug] #: epoll add event: fd: op: ev:
// :: [debug] #: epoll add event: fd: op: ev:
// :: [debug] #: setproctitle: "nginx: worker process"
// :: [debug] #: worker cycle
// :: [debug] #: epoll timer: -
这一条很有问题： 2017/06/22 10:52:52 [alert] 5473#0: worker process 5474 exited on signal 11
也许是modsecurity有什么bug。
回退两个版本至 ModSecurity-2.8.0
2.8.0 依然有这个问题。
这是一个BUG，https://github.com/SpiderLabs/ModSecurity/issues/839
在2.x版本里，作者们都不准备fix了。
解决办法，设置 proxy_force_ranges on
http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_force_ranges
2.8.0 错误消失。
2.9.0 错误消失。
七：简单规则测试
7.1 使用如下规则：
[root@dpdk output]# cat conf/mymod.conf
#SecRuleEngine DetectionOnly
SecRuleEngine On
SecRequestBodyAccess On
SecResponseBodyAccess On SecDebugLogLevel
SecDebugLog /root/modsecurity/output/logs/modsec_debug.log #SecAuditEngine On
SecAuditEngine RelevantOnly
SecAuditLogType Serial
SecAuditLog /root/modsecurity/output/logs/modsec_audit.log SecRule REQUEST_METHOD "GET" "phase:1,log,id:1001,msg:'test1'"
#SecRule REQUEST_METHOD "POST" "phase:1,log,id:1002,msg:'test2'"
#SecRule REQUEST_HEADERS:User-Agent "curl" "phase:1,log,id:1003,msg:'test3'"
SecRule REQUEST_BODY_LENGTH "@eq 5" "phase:2,log,id:1004,msg:'test4'"
[root@dpdk output]#
7.2 每次修改后，使用如下命令重载：
[root@dpdk output]# ./sbin/nginx -s reload
[root@dpdk output]#
7.3 生效后，使用如下命令测试：
/home/tong/Temp [tong@T7] [:]
> curl 192.168.7.4:
/home/tong/Temp [tong@T7] [:]
> curl 192.168.7.4: -d xx
/home/tong/Temp [tong@T7] [:]
> curl 192.168.7.4: -d xxxxx
7.4 操作后，使用如下命令查看测试结果：
[root@dpdk output]# tailf logs/modsec_audit.log
... ...
Message: Warning. Pattern match "POST" at REQUEST_METHOD. [file "/root/modsecurity/output/conf/mymod.conf"] [line ""] [id ""] [msg "test2"]
Message: Warning. Pattern match "curl" at REQUEST_HEADERS:User-Agent. [file "/root/modsecurity/output/conf/mymod.conf"] [line ""] [id ""] [msg "test3"]
Message: Warning. Operator EQ matched at REQUEST_BODY_LENGTH. [file "/root/modsecurity/output/conf/mymod.conf"] [line ""] [id ""] [msg "test4"]
... ...
八，看 ModSecurity-2.9.1 的代码
传送门：[development][security][modsecurity][nginx] nginx / modsecurity development things
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