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	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	1213	6.619
no match	-/-	859	4.687
http	lighttpd	801	4.371
http	AIM	635	3.465
http	Microsoft IIS httpd	323	1.763
kazaa-peerpoint	KaZaA P2P client Peer Point Manager	259	1.413
http	thttpd	123	0.671
http-proxy	EZproxy web proxy	106	0.578
http	DrcomServer1.0	103	0.562
http	TBS	101	0.551
upnp	Portable SDK for UPnP devices	98	0.535
ssh		81	0.442
http	GoAhead-Webs	81	0.442
http	Apache Tomcat/Coyote JSP engine	71	0.387
http	Netwave IP camera http config	68	0.371
http	Avtech AVN801 network camera	63	0.344
http	PDR-M800	51	0.278
http	Ubuntu	45	0.246
ssh	OpenSSH	42	0.229
http	Boa HTTPd	40	0.218
telnet		39	0.213
http	Net-OS 5.xx UPnP	28	0.153
vnc	VNC	27	0.147
http	WangWnagSimpleServer	27	0.147
nntp	INN nntpd	25	0.136
ftp	Microsoft ftpd	25	0.136
mysql	MySQL	21	0.115
http	uTorrent WebUI	20	0.109
http	uc-httpd	20	0.109
http	Hikvision-Webs	20	0.109
http	mini_httpd	19	0.104
http	nginx	18	0.098
http-proxy	Squid http proxy	17	0.093
http	Mbedthis-Appweb	15	0.082
smtp	Microsoft ESMTP	14	0.076
http-proxy	F5 BIG-IP load balancer http proxy	14	0.076
http	GoAhead-Webs embedded httpd	14	0.076
http	Gadspot/Avtech AV787 webcam http config	14	0.076
http	GeoVision GeoHttpServer for webcams	13	0.071
http	DVR Systems webcam http interface	12	0.065
http	AIM HTTP	12	0.065
ftp	Pure-FTPd	11	0.06
ftp	ProFTPD	10	0.055
ftp	FileZilla ftpd	10	0.055