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You are viewing an outdated report. The latest version of this report was published on December 1st, 2019


    

OS/Linux Distributions using Apache
October 1st, 2019

Report Description
The Apache server has in virtually any unbiased metric available (either from us or elsewhere) a majority market share in the web server market. Couple this with the fact that Apache will often provide hints as to the nature of the host OS it is running on, and one can view trends of linux distributions, how specialty OS' are performing in the server market and so on.

Methodology
The principal is simple: when issuing a request for a page to an Apache web server, the response received consists of HTTP Response Headers as well as the body of the web page being requested. For example, consider if we connect to a host on port 80 and request the root document. Our transaction might look something like this:

$ telnet 192.168.1.1 80 Trying 192.168.1.1... Connected to 192.168.1.1. Escape character is '^]'. GET / HTTP/1.0 HTTP/1.1 200 OK Date: Thu, 14 Feb 2008 16:24:24 GMT Server: Apache/2.2.3 (Debian) DAV/2 PHP/4.4.4-8+etch4 mod_perl/2.0.2 Perl/v5.8.8 Last-Modified: Wed, 10 Oct 2007 14:01:07 GMT ETag: "62c786-15eb-43c23eac2cec0" Accept-Ranges: bytes Content-Length: 5611 MS-Author-Via: DAV Connection: close Content-Type: text/html; charset=UTF-8 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/strict.dtd"> <html> ...<snip> </html>

The above response headers show the Server: header indicating the version of Apache, various add-on modules, as well as the fact that this platform is running the Debian linux distribution.

Reporting by Hostname (Sample size: 4,603,746 web sites)
It should be noted that not all web servers will report back the Host OS signature. In an Apache configuration file, the ServerTokens directive can be used to to disable the disclosure of this information. Only configurations that do not specify the ServerTokens directive, or set it to Full may reveal sufficient information to allow disclosure of the OS and distribution hosting the server.

In this month's survey, 25,648,456 Apache servers were detected, but only 4,603,746 (17.95%) revealed sufficient information to detect the host OS. The remainder of the survey by host information shown below is based on this subset of Apache servers that revealed the host OS.

OS/Distribution September 2019
Hostname Count
September 2019
%
August 2019
Hostname Count
August 2019
%
Growth
%
Debian1,426,20430.981,413,75930.720.83
CentOS1,382,16330.021,375,14529.890.46
Ubuntu1,236,32026.851,247,96227.12-0.98
Windows202,5894.40202,2304.390.13
FreeBSD118,5502.58120,7562.62-1.88
Red Hat109,0802.37111,2202.42-1.97
Fedora56,1441.2257,3241.25-2.11
SuSE51,4161.1250,8941.110.97
Scientific Linux7,1460.167,2130.16-0.98
Oracle4,1870.094,8660.11-14.00
Turbolinux2,6280.062,6460.06-0.73
Gentoo2,1520.052,1810.05-1.38
Mac OS X9810.029780.020.26
Darwin9310.029390.02-0.90
Mandriva6660.016770.01-1.68
Sun Cobalt5820.016050.01-3.85
Netware5530.015280.014.68
APMServ5030.015040.01-0.25
Trustix2270.002280.00-0.49
ASPLinux1310.001440.00-9.07
OpenVMS1120.001180.00-5.13
OpenPKG800.00810.00-1.29
OS/2790.00750.005.28
BlueQuartz740.00760.00-2.68
IBM640.00590.008.42
ALT Linux530.00520.001.87
UnitedLinux330.00330.00-0.05
Asianux300.00280.007.09
White Box240.00240.00-0.05
ClarkConnect110.00110.00-0.05
OpenNA80.0080.00-0.05
rPath60.0060.00-0.05
Lineox50.0050.00-0.05
iSeries40.0040.00-0.05
Tao30.0030.00-0.05
Haansoft30.0030.00-0.05
Cygwin20.0020.00-0.05
Miracle10.0010.00-0.05
PCLinuxOS10.0010.00-0.05

Reporting by Installation (Sample size: 611,148 IP Addresses)
The following graph and table are based on the same underlying data set as in the previous graphs and table, but with the distinction that we count unique IP addresses instead of unique hostnames, thus getting a more accurate representation of the number of actual web servers installed. (See Web Survey by IP for more details).

In this month's survey, 2,231,448 distinct IP Addresses hosted Apache servers, but only 611,148 (27.39%) revealed sufficient information to detect the host OS. The data below is based on this subset of servers that revealed the host OS.

OS/Distribution September 2019
IP Address Count
September 2019
%
August 2019
IP Address Count
August 2019
%
Growth
%
Ubuntu207,99134.03208,27934.000.10
CentOS158,35525.91159,10025.97-0.23
Debian150,10524.56150,14324.510.22
Windows42,5826.9742,4936.940.45
Red Hat17,3732.8417,5882.87-0.98
FreeBSD15,1762.4815,2932.50-0.53
Fedora7,8661.297,8741.290.14
SuSE7,2431.197,3801.20-1.62
Scientific Linux1,6270.271,6360.27-0.31
Oracle8790.148960.15-1.66
Turbolinux4460.074410.071.38
Netware3470.063330.054.46
Darwin2810.052760.052.06
Mandriva2360.042390.04-1.02
Sun Cobalt1510.021560.03-2.97
Gentoo1190.021220.02-2.22
OpenVMS630.01670.01-5.74
APMServ570.01590.01-3.16
Mac OS X500.01480.014.42
IBM320.01320.010.24
OpenPKG250.00260.00-3.61
ASPLinux230.00270.00-14.61
Trustix200.00190.005.52
Asianux170.00150.0013.61
OS/2170.00150.0013.61
BlueQuartz140.00150.00-6.44
White Box140.00140.000.24
ALT Linux120.00120.000.24
ClarkConnect60.0060.000.24
UnitedLinux50.0050.000.24
OpenNA40.0040.000.24
rPath30.0030.000.24
iSeries20.0020.000.24
Lineox20.0020.000.24
Cygwin10.0010.000.24
PCLinuxOS10.0010.000.24
Tao10.0010.000.24
Haansoft10.0010.000.24
Miracle10.0010.000.24

Note: Readers are cautioned that the Growth percentages are based on a server's market share penetration rather than the absolute number of servers we detected. Thus, it is possible for the number of servers to increase, while the growth is actually a negative value.





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