Send snort alerts to web page

lvelazquez · 04-18-2024, 10:27 AM

In order to understand what I'm trying to do I explain it more detailed:

I have 2 VMs with CentOS 7, I installed and set up snort-2.9.16 in one and I configured rules for detect HTTP, ICMP, FTP and SSH traffic.

Let's see how it works:

I wrote in my VM client:
[root@localhost gvelazquez]# curl 172.20.0.2
<html>
<title> Snort Logs </title>
<body> <h1> These are the snort logs </h1>
</body>
</html>

And in my VM Server (Where snort it's installed) I can see these messages:

[root@srvcentos etc]# snort -A console -q -u snort -u snort -c /home/lvelazquez/Downloads/snort-2.9.16/etc/snort.conf -i enp0s8
04/16-10:41:17.188144 [**] [1:10000040:1] HTTP Traffic Detected [**] [Priority: 0] {TCP} 172.20.130.254:36830 -> 172.20.0.2:80
04/16-10:41:17.189102 [**] [1:10000040:1] HTTP Traffic Detected [**] [Priority: 0] {TCP} 172.20.130.254:36830 -> 172.20.0.2:80
04/16-10:41:17.189116 [**] [1:10000040:1] HTTP Traffic Detected [**] [Priority: 0] {TCP} 172.20.130.254:36830 -> 172.20.0.2:80
04/16-10:41:17.191968 [**] [1:10000040:1] HTTP Traffic Detected [**] [Priority: 0] {TCP} 172.20.130.254:36830 -> 172.20.0.2:80
04/16-10:41:17.192491 [**] [1:10000040:1] HTTP Traffic Detected [**] [Priority: 0] {TCP} 172.20.130.254:36830 -> 172.20.0.2:80
04/16-10:41:17.193620 [**] [1:10000040:1] HTTP Traffic Detected [**] [Priority: 0] {TCP} 172.20.130.254:36830 -> 172.20.0.2:80

172.20.0.2 is the Ip address of my web server, I want to see these messages in my web server, but I don't know how to do it. I know that the logs of snort are in /var/log/snort so first I thought in just forwarded these logs like this:

cat /var/log/snort > /var/www/html/index.html

(/var/www/html/index.html is the path of where my web server is)

it didn't work, the web server was just filled with symbols, and nothing could be read, and the most appropriate thing would be for snort to write in index.html but I don't know how.

Can you help me?

Turbocapitalist · 04-18-2024, 10:44 AM

There are several ways to do that. One way would be to make a symbolic link from your web server's DocumentRoot to the file /var/log/snort and then assign the original file a group (or ACL) which allows the group www-data to read from it, but not write to it. Then fix the logrotate utility's configuration so that those settings are preserved. Then turn on Server-Side Include noexec for that directory on your Apache2 instance. After that you can point to your log file's symbolic link with your index.shtml file:

Code:

<html>
<title> Snort Logs </title>
<body> 
 <h1> These are the snort logs </h1>
 <pre>
  <!--#include virtual="/snort"-->
 </pre>
</body>
</html>

You might want to use Basic Auth to put a password on that file if there are multiple people using the LAN or, especially, if you plan to serve it via the open net. See also the HTML tidy utility with its -indent option.