Significant number of non-HTTP requests hitting my site

Posted by Mark Westling on Pro Webmasters See other posts from Pro Webmasters or by Mark Westling
Published on 2011-01-09T19:29:15Z Indexed on 2011/01/09 19:58 UTC
Read the original article Hit count: 244

Filed under:

nginx

|

web-security

I'm seeing a significant number of non-HTTP requests hitting a site I just launched. They show up in the server (nginx) logs as non-ASCII and get rejected (correctly) with a 400 status. Here are some lines from the log:

95.132.198.189 - - [09/Jan/2011:13:53:30 -0500] "œ$A\x10õœ²É9J" 400 173 "-" "-" 79.100.145.126 - - [09/Jan/2011:13:57:42 -0500] "#§i²¸oYi á¹„\x13VJ—x·—œ\x04N \x1DÔvbÛè½\x10§¬\x1E0œ_^¼+\x09ÜÅ\x08DÌÃiJeT€¿æ]œr\x1EëîyIÐ/ßýúê5Ç¸" 400 173 "-" "-" 79.100.145.126 - - [09/Jan/2011:13:58:33 -0500] "¯Ú%ø=Œ›D@\x12î½‰¼\x1C†ÄÀe\x015mˆàd˜Û%pÛÿ" 400 173 "-" "-"

What should I make of this? Is this some sort of scripted attack? Or could these be correct requests that have somehow been garbled?

They're not affecting the performance of the site and I'm not seeing any other signs of attacks (e.g., no strange POSTs) so at this point I'm more curious than afraid.

© Pro Webmasters or respective owner

Related posts about nginx

ModSecurity compile error on nginx

as seen on Server Fault - Search for 'Server Fault'
I'm trying to install ModSecurity on nginx with the following instructions : wget https://github.com/SpiderLabs/ModSecurity/archive/master.zip unzip master cd ModSecurity-master ./autogen.sh ./configure --enable-standalone-module And i got the following error : Checking plataform... Identified… >>> More
Cannot Start Nginx Compiled from Source

as seen on Server Fault - Search for 'Server Fault'
I am trying to compile Nginx from source based on the original compiled Nginx server running on my DigitalOcean server ( Ubuntu-14.04 64x ) but with a few extra modules. I can get everything installed smoothly but I can not get it to start. I am sure the ini is correct because I copied the original… >>> More
Nginx http_mp4_module seam installed but dont work

as seen on Server Fault - Search for 'Server Fault'
I try to use the http_mp4_module on my Ubuntu server but that didnt seem to work at all. When i check nginx -V i get : nginx version: nginx/1.1.19 TLS SNI support enabled configure arguments: --prefix=/etc/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-client-body-temp-path=/var/lib/nginx/body… >>> More
GeoIP and Nginx

as seen on Server Fault - Search for 'Server Fault'
I have a nginx with geoip, but it is not working rightly. The issue is the next: Nginx are getting geodata from $_SERVER['REMOTE_ADDR'] instead of $_SERVER['HTTP_X_HAPROXY_IP'], which have the real client ip. So, the reported geodata belongs to my server ip instead of client ip. Does anybody where… >>> More
Nginx1.6.1: Installing from source not running corectly

as seen on Server Fault - Search for 'Server Fault'
I just installed Nginx 1.6.1 from source but it didn't seem to installed correctly. Nginx is running if I service nginx status but when I do nginx -v it outputs command not found. Regular HTML page shows fine and there is no error in the error logs. I am on AWS Ec2 linux AMI. Here is my /etc/init… >>> More

Related posts about web-security

System.Web.Security.FormsAuthentication.Encrypt returns null

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to encrypt some userData to create my own custom IPrincipal and IIdentity objects using Forms authentication - I've serialized an object representing my logged in user to Json and created my FormsAuthentication ticket like so: string user_item = GetJsonOfLoggedinUser();/*get JSON representation… >>> More
Google Releases Web Security Scanner

as seen on Devx - Search for 'Devx'
"Skipfish" helps developers test their Web apps for vulnerabilities. >>> More
Google Releases Web Security Scanner

as seen on Internet.com - Search for 'Internet.com'
"Skipfish" helps developers test their Web apps for vulnerabilities. >>> More
Web Security Threats on the Rise, Report Finds

as seen on Dot net Slackers - Search for 'Dot net Slackers'
It may not be Tony Soprano on the Web, but a new security report finds that wise-guy hackers have become increasingly organized....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight… >>> More
Web Security: Worst-Case Situation

as seen on Stack Overflow - Search for 'Stack Overflow'
I currently have built a system that checks user IP, browser, and a random-string cookie to determine if he is an admin. In the worst case, someone steals my cookie, uses the same browser I do, and masks his IP to appear as mine. Is there another layer of security I should add onto my script to make… >>> More