I have just finished setting up a server on AWS ECS.
All of the configurations are identical to a different server I have, except for Apache version (from 2.2 to 2.4) and PHP version (from 5.3 to 5.6).
I have modified my index.php file to only printout the php_info(), but I keep getting:
Bad Request
Your browser sent a request that this server could not understand. Additionally, a 400 Bad Request error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2.4.25 (Amazon) Server at xxx.yyy.com Port 80
I have looked at all the logs saved from my accesses and this is what I get from this specific access:
error_log
[Tue Jan 24 16:20:46.154208 2017] [suexec:notice] [pid 32139] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Tue Jan 24 16:20:46.249527 2017] [auth_digest:notice] [pid 32146] AH01757: generating secret for digest authentication ...
[Tue Jan 24 16:20:46.250415 2017] [lbmethod_heartbeat:notice] [pid 32146] AH02282: No slotmem from mod_heartmonitor
[Tue Jan 24 16:20:46.276823 2017] [mpm_prefork:notice] [pid 32146] AH00163: Apache/2.4.25 (Amazon) OpenSSL/1.0.1k-fips configured -- resuming normal operations
[Tue Jan 24 16:20:46.276840 2017] [core:notice] [pid 32146] AH00094: Command line: '/usr/sbin/httpd'
access_log
90.152.127.182 - - [24/Jan/2017:16:21:03 +0000] "GET / HTTP/1.1" 400 437 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36"
90.152.127.182 - - [24/Jan/2017:16:21:04 +0000] "GET /favicon.ico HTTP/1.1" 400 437 "http://xxx.yyy.com/" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36"
ssl_access_log
90.152.127.182 - - [24/Jan/2017:16:12:24 +0000] "GET / HTTP/1.1" 400 434 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36"
90.152.127.182 - - [24/Jan/2017:16:12:25 +0000] "GET /favicon.ico HTTP/1.1" 400 434 "https://xxx.yyy.com/" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36"
What could be causing my 400 status?
Before you ask, I have installed mod_ssl, yes.
🚨 Attention website owners and developers! 🚨
If you’ve encountered the error message “Apache Server 400 Bad Request,” you’re not alone. This error is one of the most common issues website owners and developers encounter when running their websites. Understanding what causes this error and how to fix it is crucial for your website’s success.
What is Apache Server 400 Bad Request?
First things first, let’s define what Apache Server 400 Bad Request is. This error indicates that the server received an invalid request from your browser. This error can occur for several reasons, including:
1. Invalid URL
If you’ve typed in an incorrect URL, the server won’t be able to find it. This error can also occur if the URL is too long or contains invalid characters.
2. Invalid Request Header
The server requires certain information in the request header to respond to your browser’s request. If the request header is missing or invalid, the server will return a 400 error.
3. Server Timeout
If the server takes too long to respond to the browser’s request, it will return a 400 error. This can occur if the server is overloaded with requests or if the website’s code is too complex.
4. Cookies
If your browser’s cookies are corrupted or invalid, it can cause a 400 error. Clearing your browser’s cookies may fix this issue.
5. Firewall or Proxy Issues
Firewalls and proxies can sometimes alter the request header, causing a 400 error. Disabling these features temporarily may help resolve the issue.
6. Server Configuration
If the server’s configuration is incorrect, it may return a 400 error. This can occur if the server is unable to handle the request due to insufficient resources.
7. Malware or Viruses
If your website is infected with malware or viruses, it can cause a 400 error. Running a malware scan on your website may help you identify and remove any malicious files.
The Advantages and Disadvantages of Apache Server 400 Bad Request
The Advantages
The Apache Server 400 Bad Request error is advantageous because it notifies you when your browser sends an invalid request to your server. This helps you detect and troubleshoot the root cause of the error quickly.
The Disadvantages
The Apache Server 400 Bad Request error can be detrimental to your website’s traffic, as it prevents users from accessing your website. It can also negatively impact your website’s search engine optimization (SEO) and search engine rankings.
The Complete Information about Apache Server 400 Bad Request
|
Term |
Description |
|---|---|
|
Error Code |
400 |
|
Common Causes |
Invalid URL, invalid request header, server timeout, cookies, firewall or proxy issues, server configuration, malware or viruses |
|
Impact |
Prevents users from accessing your website, negatively affects website’s SEO and search engine rankings |
|
How to Fix |
Check for invalid URL, clear browser’s cookies, temporarily disable firewall or proxy, run a malware scan, optimize server’s configuration |
Frequently Asked Questions (FAQs)
1. Why am I receiving an Apache Server 400 Bad Request error?
You’re receiving this error because your browser sent an invalid request to your server. Check for any of the common causes listed above.
2. Can I still access my website’s admin panel if I receive a 400 error?
It depends on the severity of the error and what’s causing it. Sometimes, you may still be able to access your website’s admin panel despite receiving a 400 error. Other times, the error may prevent you from accessing your website altogether.
3. Is a 400 error the same as a 404 error?
No, they’re different errors. A 404 error indicates that the server couldn’t find the requested resource, while a 400 error indicates that the server received an invalid request.
4. How can I optimize my server’s configuration to prevent a 400 error?
You can optimize your server’s configuration by increasing its resources, such as CPU, memory, and disk space. You can also optimize your website’s code to reduce its complexity and improve its performance.
5. Will clearing my browser’s cookies fix a 400 error?
Clearing your browser’s cookies may fix a 400 error caused by invalid or corrupted cookies. However, it’s not a guaranteed fix for all 400 errors.
6. Can malware cause a 400 error?
Yes, malware can infect your website’s files and cause a 400 error. Running a malware scan on your website can help you identify and remove any malicious files.
7. How can I prevent a 400 error from affecting my website’s SEO?
You can prevent a 400 error from affecting your website’s SEO by quickly identifying and fixing the error. You can also use SEO best practices, such as optimizing your website’s content and metadata, to improve your website’s search engine rankings.
8. Does a 400 error affect website performance?
Yes, a 400 error can negatively impact your website’s performance by preventing users from accessing your website and causing search engine rankings to drop.
9. How can I temporarily disable my website’s firewall or proxy?
The process to disable your website’s firewall or proxy varies depending on your hosting provider. Check with your provider’s support team for instructions.
10. How can I check if my website is infected with malware or viruses?
You can check if your website is infected with malware or viruses by running a malware scan using a reputable anti-malware software or service.
11. Can an invalid request header cause a 400 error?
Yes, an invalid request header can cause a 400 error. Check the request header to ensure it’s valid and contains all the necessary information.
12. Can a server timeout be caused by high traffic?
Yes, a server timeout can be caused by high traffic. Optimizing your server’s resources can help prevent server timeouts due to high traffic.
13. How long does it take to fix a 400 error?
The time to fix a 400 error depends on the severity of the error and what’s causing it. It could take anywhere from a few minutes to several hours or even days to resolve the issue.
Conclusion: Don’t Let Apache Server 400 Bad Request Slow You Down
Now that you have a better understanding of Apache Server 400 Bad Request, you can take action to resolve the issue quickly and effectively. If you encounter a 400 error, don’t panic! Use the information in this article to troubleshoot the issue and get your website back up and running in no time.
Remember, a 400 error can negatively impact your website’s traffic and search engine rankings. By taking proactive measures to prevent this error from occurring, you can improve your website’s performance and provide a better user experience for your visitors.
Thank you for reading and happy troubleshooting!
Closing Disclaimer: This article is for informational purposes only and should not be considered as professional advice. Always consult with a qualified expert for your specific needs.
Video:Apache Server 400 Bad Request: What it is and How to Fix it
I have just finished setting up a server on AWS ECS.
All of the configurations are identical to a different server I have, except for Apache version (from 2.2 to 2.4) and PHP version (from 5.3 to 5.6).
I have modified my index.php file to only printout the php_info(), but I keep getting:
Bad Request
Your browser sent a request that this server could not understand. Additionally, a 400 Bad Request error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2.4.25 (Amazon) Server at xxx.yyy.com Port 80
I have looked at all the logs saved from my accesses and this is what I get from this specific access:
error_log
[Tue Jan 24 16:20:46.154208 2017] [suexec:notice] [pid 32139] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Tue Jan 24 16:20:46.249527 2017] [auth_digest:notice] [pid 32146] AH01757: generating secret for digest authentication ...
[Tue Jan 24 16:20:46.250415 2017] [lbmethod_heartbeat:notice] [pid 32146] AH02282: No slotmem from mod_heartmonitor
[Tue Jan 24 16:20:46.276823 2017] [mpm_prefork:notice] [pid 32146] AH00163: Apache/2.4.25 (Amazon) OpenSSL/1.0.1k-fips configured -- resuming normal operations
[Tue Jan 24 16:20:46.276840 2017] [core:notice] [pid 32146] AH00094: Command line: '/usr/sbin/httpd'
access_log
90.152.127.182 - - [24/Jan/2017:16:21:03 +0000] "GET / HTTP/1.1" 400 437 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36"
90.152.127.182 - - [24/Jan/2017:16:21:04 +0000] "GET /favicon.ico HTTP/1.1" 400 437 "http://xxx.yyy.com/" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36"
ssl_access_log
90.152.127.182 - - [24/Jan/2017:16:12:24 +0000] "GET / HTTP/1.1" 400 434 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36"
90.152.127.182 - - [24/Jan/2017:16:12:25 +0000] "GET /favicon.ico HTTP/1.1" 400 434 "https://xxx.yyy.com/" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36"
What could be causing my 400 status?
Before you ask, I have installed mod_ssl, yes.
I’m trying to debug an issue in my app and looking for suggestions or troubleshooting tips.
My app consists of a mobile app submitting data over HTTPS to apache (which is using mod_proxy to forward onto a django server). However, I’ve added logging at the django layer and it seems to indicate that the 400 is coming directly from Apache and not getting forwarded at all.
Also this only happens for a very small subset of POSTs. Due to the infrequency of the problem and the fact that it has been coming from phones that I don’t have access to it has been difficult to reproduce and debug.
What types of things should I be looking at to troubleshoot this? I had found this post but I am already on Apache 2.2.22 so that doesn’t appear to be the issue.
Because of the volume of requests I’m hesitant to add full logging to every request (though maybe I can do some conditional logging?).
Looking for suggestions on:
- What the root problem could be. E.g. what types of problems introduce intermittent 400s like this
- How to get more information on the server side to help diagnose, given that I can’t get access to the client data.
Although I am by no means an expert on Ubuntu, I have had two servers running for a couple of years with no problems.
Last night, when attempting to access a local website on one of them I got the error:
**Bad Request**
Your browser sent a request that this server could not understand.
Additionally, a 400 Bad Request error was encountered while trying to use an ErrorDocument to handle the request.
After several hours of frustration and no success, I rebuilt the server. While Ubuntu was installing I went to the other server and got the exact same error.
The first server has now been rebuilt and it displays the same error.
I have shut down every computer on the network. Powered down the router and started over.
In addition to the two servers, the network consists of three windows machines and a Ubuntu desktop.
I have tried isolating the machines from the Internet, I have tried both wired and wireless clients.
Going to localhost on the servers displays the Ubuntu Apache Default page.
The only thing that happened about the time the problem started was the Windows decided to shutdown this machine for an update. I don’t see how this could have caused a problem but I have isolated this machine from the network and the problem exists.
I cleared cookies, used five different browsers, and they all report the same error. I’m about out of ideas, and looking for any suggestions.