Overview of services running on Port 591 TCP.
~14 Thousand IP addresses observed from May to December 2012
To get raw lists of the data go to Download. For an explanation of what this data is and how it was obtained, see Paper.

Servicename	Product	Version	Info	OS	Devicetype	Count	Percent
http						3649	24.559
http	SonicWALL				firewall	3545	23.859
chat	AIM or ICQ server					1559	10.493
no match						935	6.293
http	AIM	1.0				671	4.516
http	FileMaker Web Publishing httpd					560	3.769
http	lighttpd	1.4.19				379	2.551
http	lighttpd	1.4.29				256	1.723
http	Microsoft IIS httpd	6.0		Windows		189	1.272
http	DrcomServer1.0					110	0.74
http	Network Associates ePolicy Orchestrator					91	0.612
http	Apache Tomcat/Coyote JSP engine	1.1				89	0.599
http	Netwave IP camera http config				webcam	88	0.592
ssh			protocol 1.5			85	0.572
http	FileMakerPro httpd	4.0				82	0.552
http	GoAhead-Webs					81	0.545
http	thttpd	2.24 26oct2003				78	0.525
http	Microsoft IIS httpd	7.5		Windows		74	0.498
http	Avtech AVN801 network camera	1.0	UPnP 1.0		webcam	70	0.471
http	FileMakerPro httpd	5.0				58	0.39
http	WebCompanion httpd 6.0v3		FileMakerPro 6.0v4			50	0.337
http	PDR-M800	1.0				50	0.337
http	Microsoft IIS httpd	7.0		Windows		47	0.316
smtp						42	0.283
telnet						41	0.276
http	WebCompanion httpd 6.0v1		FileMakerPro 6.0v4			41	0.276
http	Apache					39	0.262
http	mini_httpd	1.19 19dec2003				37	0.249
http	Boa HTTPd	0.94.14rc21				35	0.236
vnc	VNC		protocol 3.8			32	0.215
http	Apache		SSL-only mode			28	0.188
http	thttpd	2.25b 29dec2003				27	0.182
http	Hikvision-Webs					26	0.175
http	Microsoft IIS httpd					25	0.168
http	uc-httpd	1.0.0				24	0.162
http	Apache	2.2.3	(CentOS)			23	0.155
ftp	Microsoft ftpd			Windows		22	0.148
http	Mbedthis-Appweb	2.0.4				20	0.135