Overview of services running on Port 3531 TCP.
~18 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	Count	Percent
http			3877	21.156
irc	Dancer ircd		3550	19.371
http	SonicWALL		3394	18.52
chat	AIM or ICQ server		1407	7.678
http	Apache	2.2.8	922	5.031
no match	-/-	-/-	859	4.687
http	AIM	1.0	635	3.465
http	lighttpd	1.4.29	409	2.232
http	lighttpd	1.4.19	363	1.981
kazaa-peerpoint	KaZaA P2P client Peer Point Manager		259	1.413
http	Microsoft IIS httpd	6.0	209	1.14
http-proxy	EZproxy web proxy		106	0.578
http	DrcomServer1.0		103	0.562
http	TBS	R2 UPnP	101	0.551
upnp	Portable SDK for UPnP devices	1.3.1	98	0.535
ssh			81	0.442
http	GoAhead-Webs		81	0.442
http	thttpd	2.24 26oct2003	72	0.393
http	Apache Tomcat/Coyote JSP engine	1.1	71	0.387
http	Netwave IP camera http config		68	0.371
http	Avtech AVN801 network camera	1.0	63	0.344
http	Apache		61	0.333
http	PDR-M800	1.0	51	0.278
http	Microsoft IIS httpd	7.5	51	0.278
http	Ubuntu	lucid UPnP	45	0.246
telnet			39	0.213
http	Apache	2.2.14	35	0.191
http	Apache	2.2.3	32	0.175
http	Net-OS 5.xx UPnP	1.0	28	0.153
http	Microsoft IIS httpd	7.0	28	0.153
vnc	VNC		27	0.147
http	WangWnagSimpleServer	1.0	27	0.147
nntp	INN nntpd		25	0.136
http	Boa HTTPd	0.94.14rc21	24	0.131
ftp	Microsoft ftpd		24	0.131
http	thttpd	2.25b 29dec2003	23	0.126
http	uTorrent WebUI		20	0.109
http	uc-httpd	1.0.0	20	0.109
http	Hikvision-Webs		20	0.109
http	Apache	2.2.22	20	0.109
http	mini_httpd	1.19 19dec2003	19	0.104
http	thttpd		17	0.093
http	Microsoft IIS httpd		16	0.087
http	Apache	1.3.28	16	0.087
http	Mbedthis-Appweb	2.0.4	15	0.082
http	Apache	2.2.16	15	0.082