Overview of services running on Port 6600 TCP.
~25 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
irc	Dancer ircd	3655	14.509
http	SonicWALL	3477	13.802
http		3252	12.909
no match	-/-	2935	11.651
irc	Unreal ircd	1604	6.367
chat	AIM or ICQ server	1598	6.343
telnet	Cisco telnetd	1516	6.018
http	lighttpd	850	3.374
vnc	VNC	730	2.898
http	AIM	666	2.644
ssh	Dropbear sshd	611	2.425
telnet		548	2.175
http	Apache	427	1.695
http	Microsoft IIS httpd	391	1.552
http	Indy	220	0.873
http	thttpd	141	0.56
http	Apache Tomcat/Coyote JSP engine	127	0.504
soap	gSOAP soap	125	0.496
http	DrcomServer1.0	122	0.484
ssh	OpenSSH	112	0.445
ssh		89	0.353
http	GoAhead-Webs	82	0.326
http	Boa HTTPd	78	0.31
http	Netwave IP camera http config	75	0.298
http	Avtech AVN801 network camera	75	0.298
telnet	the MRV Communications' LX Series Server	74	0.294
http-proxy	Squid http proxy	63	0.25
http	PDR-M800	52	0.206
ssl	TLS	42	0.167
vnc	RealVNC Enterprise	39	0.155
vnc		36	0.143
http	mini_httpd	36	0.143
http	uc-httpd	33	0.131
vnc-http	Ultr@VNC	31	0.123
mysql	MySQL	31	0.123
http	GoAhead-Webs embedded httpd	31	0.123
ftp	Microsoft ftpd	28	0.111
vnc	RealVNC Personal	23	0.091
shoutcast	SHOUTcast server	23	0.091
xml		22	0.087
vnc-http	RealVNC	22	0.087
ftp	vsftpd (before 2.0.8) or WU-FTPD	22	0.087
http	Gadspot/Avtech AV787 webcam http config	21	0.083
http	DVR Systems webcam http interface	20	0.079
http-proxy	EZproxy web proxy	19	0.075
http	nginx	19	0.075
http	Hikvision-Webs	19	0.075
ftp	ProFTPD	19	0.075
http	uTorrent WebUI	18	0.071
irc-proxy	psyBNC	17	0.067
http	Mbedthis-Appweb	17	0.067
smtp	Microsoft ESMTP	15	0.06
telnet	the MRV Communications' LX Series Console Server	14	0.056
http	RemotelyAnywhere remote PC management httpd	14	0.056
http-proxy	F5 BIG-IP load balancer http proxy	14	0.056
http	Jetty	14	0.056
http	Secure Computing Sidewinder firewall http admin	13	0.052
http	GoAhead-Webs httpd	13	0.052
ftp		13	0.052
redis	Redis key-value store	12	0.048
http	Microsoft HTTPAPI httpd	12	0.048
ftp	vsftpd	12	0.048
smtp		11	0.044
http	WebLogic httpd	11	0.044
ftp	Serv-U ftpd	11	0.044
ftp	FileZilla ftpd	11	0.044
ssh	MikroTik RouterOS sshd	10	0.04
smtp	Microsoft Exchange smtpd	10	0.04
http	GeoVision GeoHttpServer for webcams	10	0.04
http	ESET NOD32 anti-virus update httpd	10	0.04
http	Cross Web Server	10	0.04
http	AIM HTTP	10	0.04