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	Count	Percent
http		3676	24.741
http	SonicWALL	3545	23.859
chat	AIM or ICQ server	1559	10.493
no match	-/-	935	6.293
http	AIM	671	4.516
http	lighttpd	668	4.496
http	FileMaker Web Publishing httpd	560	3.769
http	Apache	438	2.948
http	Microsoft IIS httpd	365	2.457
http	Network Associates ePolicy Orchestrator	149	1.003
http	FileMakerPro httpd	140	0.942
http	thttpd	135	0.909
http	DrcomServer1.0	110	0.74
http	Apache Tomcat/Coyote JSP engine	94	0.633
http	WebCompanion httpd 6.0v1	92	0.619
http	Netwave IP camera http config	88	0.592
ssh		87	0.586
http	GoAhead-Webs	81	0.545
http	Avtech AVN801 network camera	70	0.471
http	WebCompanion httpd 6.0v3	69	0.464
ssh	OpenSSH	59	0.397
http	Boa HTTPd	52	0.35
http	PDR-M800	50	0.337
telnet		42	0.283
smtp		42	0.283
vnc	VNC	40	0.269
http	mini_httpd	37	0.249
http	WebCompanion httpd 6.0Jv1	28	0.188
http	Hikvision-Webs	26	0.175
http	uc-httpd	24	0.162
http	nginx	24	0.162
ftp	Microsoft ftpd	23	0.155
mysql	MySQL	22	0.148
http	Mbedthis-Appweb	21	0.141
http	WebCompanion httpd 5.5v3	20	0.135
http-proxy	Squid http proxy	19	0.128
http	Gadspot/Avtech AV787 webcam http config	19	0.128
http	FileMakerPro	17	0.114
http	Cross Web Server	17	0.114
smtp	Microsoft ESMTP	16	0.108
http	uTorrent WebUI	16	0.108
http	WebCompanion httpd 5.5v4	15	0.101
directconnect	Direct Connect P2P	15	0.101
http	GoAhead-Webs embedded httpd	14	0.094
http	WebCompanion httpd 6.0v2	13	0.087
http-proxy	F5 BIG-IP load balancer http proxy	13	0.087
http	Microsoft HTTPAPI httpd	13	0.087
http	WebCompanion httpd 6.0Jv3	12	0.081
http	Secure Computing Sidewinder firewall http admin	12	0.081
http	GeoVision GeoHttpServer for webcams	12	0.081
ftp	ProFTPD	12	0.081
ftp		12	0.081
http	AIM HTTP	11	0.074
ftp	Serv-U ftpd	11	0.074
http	NAI EPO Agent framework	10	0.067