HTTP
HTTP HTTP - hyper text transfer protocol, a way to transfer website data via Internet.

HTTP - hyper text transfer protocol, a way to transfer website data via Internet. At first, was created for transfer of HTML documents, now most of website data (audio, video, images etc.) is downloaded through this protocol. HTTP has several methods - to check a website, to get the data from the server, and to upload some information from client to the site. More about them you may find in this article. HTTP has its secure version - HTTPS

This protocol is used by clients to review web pages. Thus, to check a website, we should use it too. Website monitoring services, like HostTracker, perform HTTP checks to make sure that the site is operating well.

  • CM.Glossary.WebsiteMonitoring
  • CM.Glossary.HTTPS
  • CM.Glossary.HTTPMethods
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"Thank you so much for your service. We were suspecting problems with our hosting company but they denied any problems saying the issues must be at our end. We know we do have issues at our end but still suspected that wasn't the entire story. Your service was able to prove that they are indeed going down regularly - on average twice a week during the trial period. Thanks again for providing the information we needed to make a proper decision on this issue."
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Shellshock vulnerability online check

Considering the recently discovered Shellshock vulnerability, HostTracker has created a tool for testing it.

How does it work?

It is developed for a Linux server with a web server installed on it. The algorithm is very simple. We consequently generate 4 http requests:

  • 1. Ordinary request
  • 2. The request tries, using vulneratility, post a "harmful" cookie which causes 2-seconds delay in respond to our special http request.
  • 3. The request tries, using vulneratility, post a "harmful" cookie which causes 4-seconds delay in respond to our special http request.
  • 4. Same as #3

How to understand the result?

We compare response time for all 4 requests. Three situation are possible:

  • 1. Vulnerability found. We may affirm that if the difference in responses is about 2 seconds for requests without cookie and with 2-second-delay cookie, as well as for requests with 2 and 4-second delay cookie. It means that our request was able to use the vulnerability and set these cookies.
  • 2. Vulnerability not found. All the requests have about the same response time. The cookies, likely, were not installed because there is no vulnerability.
  • 3. Uncertain situation. If the response time differs widely, without coincidence with preset by cookies delay, we can not say for sure. It could be if the server is under high load. To check this, we use two requests with same cookies (#3 and #4). If the response time for two same checks varies, we make a conclusion that the response time is not affected by cookies. At least, not only by them. So in this case our method can not detect vulnerability

Safety of checks

Our test can not damage your server. The risk consists of appearance of one extra-cookie, which is used only for our requests and can not affect normal work-flow of your site.

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Task statistic
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Start date Uptime Downtime
2018-04-01 99.95 % 1 hour(s) 1 min(s) 0.01:01:05
2018-01-01 99.58 % 8 hour(s) 39 min(s) 0.08:39:59
2017-10-01 98.61 % 1 day(s) 6 hour(s) 1.06:21:18
2017-07-01 100 %  
2017-04-01 99.88 % 2 hour(s) 30 min(s) 0.02:30:24
2017-01-01 98.9 % 23 hour(s) 30 min(s) 0.23:30:38
2016-10-01 100 %  
2016-07-01 99.89 % 2 hour(s) 30 min(s) 0.02:30:44
2016-04-01 99.91 % 2 hour(s) 40 sec(s) 0.02:00:40
2016-01-01 99.04 % 20 hour(s) 56 min(s) 0.20:56:29
2015-10-01 99.75 % 5 hour(s) 30 min(s) 0.05:30:58
2015-07-01 100 % 1 min(s) 31 sec(s) 0.00:01:31
2015-04-01 99.7 % 6 hour(s) 31 min(s) 0.06:31:11
2015-01-01 100 %  
2014-10-01 99.63 % 7 hour(s) 59 min(s) 0.07:59:57
2014-07-01 99.9 % 2 hour(s) 2 min(s) 0.02:02:32
2014-04-01 100 % 44 sec(s) 0.00:00:44
2007-01-01 99.87 % 1 hour(s) 49 min(s) 0.01:49:20
2006-10-01 99.9 % 1 hour(s) 54 min(s) 0.01:54:59
2006-07-01 99.62 % 4 hour(s) 3 min(s) 0.04:03:10
2006-04-01 100 % 5 min(s) 0 sec(s) 0.00:05:00
2006-01-01 100 % 1 min(s) 23 sec(s) 0.00:01:23
2005-10-01 100 %  
2005-07-01 99.8 % 3 hour(s) 42 min(s) 0.03:42:10
2005-04-01 99.48 % 7 hour(s) 15 min(s) 0.07:15:22
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