Overview of services running on Port 6666 TCP.
~116 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
socks5			43714	37.624
no match	-/-	-/-	19125	16.46
socks-proxy	Socks4A		7727	6.65
irc	Unreal ircd		5357	4.611
irc	Dancer ircd		4142	3.565
http			3755	3.232
melange	Melange Chat Server	1.10	2724	2.344
chat	AIM or ICQ server		2569	2.211
telnet	Cisco telnetd		2058	1.771
http	Microsoft IIS httpd		1897	1.633
vnc	VNC		1139	0.98
irc	InspIRCd		1095	0.942
ssh	OpenSSH	4.3	893	0.769
telnet			790	0.68
http	Microsoft HTTPAPI httpd	2.0	757	0.652
irc	ircu ircd		527	0.454
http	Apache Tomcat/Coyote JSP engine	1.1	500	0.43
http-proxy	Squid http proxy	2.7.STABLE9	457	0.393
http	GoAhead-Webs httpd		450	0.387
http	lighttpd	1.4.19	439	0.378
ssh	OpenSSH	5.3	404	0.348
ssh	OpenSSH	5.5p1 Debian 6+squeeze2	394	0.339
irc			379	0.326
http	Virata-EmWeb	6.0.1	378	0.325
http-proxy	Squid http proxy	3.1.19	357	0.307
ca-mq	CA Message Queuing Server		349	0.3
remoting	MS .NET Remoting services		334	0.287
http	Boa HTTPd	0.94.14rc21	332	0.286
irc	IRCnet ircd		286	0.246
irc	ratbox ircd		272	0.234
http-proxy	Squid http proxy	2.6.STABLE21	268	0.231
http	Boa HTTPd	0.93.15	258	0.222
eggdrop	Eggdrop irc bot console	1.6.18	256	0.22
ssh	MikroTik RouterOS sshd		253	0.218
ssl	TLS	1.0	236	0.203
http	Hikvision-Webs		200	0.172
http	ProLinux	1.0	197	0.17
http	thttpd	2.25b	187	0.161
ssh	OpenSSH	5.1p1 Debian 5	184	0.158
directconnect	Direct Connect P2P		175	0.151
vnc	RealVNC Personal		174	0.15
http	Router		168	0.145
vnc	RealVNC Enterprise		158	0.136
http	PROLinux	2.0	146	0.126
smtp			141	0.121
http	lighttpd	1.4.29	140	0.12
http	thttpd	2.24	136	0.117
ftp	Microsoft ftpd		132	0.114
ssh	OpenSSH	5.9p1 Debian 5ubuntu1	130	0.112
http	thttpd		130	0.112
ssh	OpenSSH	3.9p1	126	0.108
ssh	OpenSSH	5.3p1 Debian 3ubuntu7	124	0.107
ftp			122	0.105
irc	IRCnet-based ircd		116	0.1
http	TP-LINK Router		114	0.098
arcserve	ARCserve Discovery		114	0.098
http	nginx	0.8.33	111	0.096
ssh			110	0.095
intranetchat	Intranet Chat Server		108	0.093
http	Boa HTTPd	0.94.13	100	0.086
ssh	OpenSSH	5.5p1 Debian 6+squeeze1	94	0.081
irc	BitlBee IRCd		94	0.081
http	micro_httpd		94	0.081
http	thttpd	2.20c 21nov01	92	0.079
ovm-manager	Oracle VM Manager		89	0.077
telnet	CircleMUD telnetd	3.0	81	0.07
http	nginx		74	0.064
vnc			70	0.06
ftp	Serv-U ftpd	6.4	68	0.059
lexlm	Lexmark language monitor		66	0.057
upnp	Microsoft Windows UPnP		65	0.056
http	MpVodServer	1.2	65	0.056
ftp	vsftpd	2.0.8 or later	64	0.055
ftp	Serv-U ftpd	6.0	63	0.054
http	http server 1.0		62	0.053
http	Apache	2.2.3	62	0.053
ssh	OpenSSH	5.2	60	0.052
xml			59	0.051
http	Microsoft HTTPAPI httpd	1.0	58	0.05
ssh	OpenSSH	5.8p1 Debian 1ubuntu3	55	0.047
napster	WinMX or Lopster Napster P2P client		54	0.046
ftp	FileZilla ftpd		54	0.046
mongodb	MongoDB	4	53	0.046
ftp	Pure-FTPd		53	0.046
ssh	OpenSSH	5.8	51	0.044
http	Ubicom	1.1	51	0.044
http	lighttpd		50	0.043
http	Linksys router http config		49	0.042
ssh	Dropbear sshd	0.52	48	0.041
http	Apache	2.2.9	47	0.04
ssh	OpenSSH	2.3.0 mikrotik 2.9	46	0.04
http	Boa httpd		46	0.04
ssh	OpenSSH	5.8p1 Debian 7ubuntu1	44	0.038
http-proxy	Squid http proxy	2.6.STABLE12	44	0.038
http-proxy	MikroTik http proxy		44	0.038
http	Apache	2.2.16	44	0.038
ftp	ProFTPD		44	0.038
ssh	OpenSSH	5.1	42	0.036
ssh	OpenSSH	3.6.1p2	41	0.035
jabber	Jabber instant messaging server		41	0.035
svnserve	Subversion		40	0.034
http-proxy	Squid http proxy		40	0.034
http	Apache	1.3.26	40	0.034
http	GeoVision GeoHttpServer for webcams		39	0.034
http	Apache	2.2.14	38	0.033
eggdrop	Eggdrop IRC bot console	1.6.20	37	0.032
ssh	WeOnlyDo sshd	2.1.3	36	0.031
http	webserver	1.0	36	0.031
http	MiniServ	0.01	35	0.03
http	lighttpd	1.4.28	35	0.03
ftp	FileZilla ftpd	0.9.41 beta	35	0.03
ftp	FileZilla ftpd	0.9.39 beta	35	0.03
irc-proxy	psyBNC	2.3.1	34	0.029
http	Apache	2.2.22	34	0.029
ssh	OpenSSH	5.5p1 Debian 6	33	0.028
ssh	Dropbear sshd	0.53.1	33	0.028
smtp	Postfix smtpd		33	0.028
shell	w4ck1ng-shell	0.3	33	0.028
irc	Hybrid-based ircd		33	0.028
eggdrop	Eggdrop IRC bot console	1.6.21	33	0.028
http	WYM httpd	1.0	32	0.028
ssh	OpenSSH	5.4p1	29	0.025
irc-proxy	psyBNC	2.3.2-7	29	0.025
http	uTorrent http admin	3.0	29	0.025
http	Router Webserver		29	0.025
http-proxy	Haproxy http proxy		29	0.025
http	Jetty	8.0.y.z-SNAPSHOT	29	0.025
http	MiniServ	1.590	28	0.024
http	InterSect Alliance SNARE http config		28	0.024
http	H3C-Miniware-Webs		28	0.024
http	Jetty	6.1.x	27	0.023
vnc	Apple remote desktop vnc		26	0.022
ssh	OpenSSH	5.6	26	0.022
telnet	Linux telnetd		25	0.022
ssh	OpenSSH	6.0p1 Debian 2	25	0.022
ntop-http	Ntop web interface	3.2	25	0.022
smtp	Microsoft Exchange smtpd		24	0.021
ssh	OpenSSH	5.4	23	0.02
ssh	OpenSSH	5.1p1 Debian 5ubuntu1	23	0.02
ssh	OpenSSH	4.5p1	23	0.02
ftp	FileZilla ftpd	0.9.40 beta	23	0.02
ssh	OpenSSH	5.8p1-hpn13v11	22	0.019
ssh	OpenSSH	4.2	22	0.019
ssh	Dropbear sshd	0.51	22	0.019
http	Microsoft ISA httpd		22	0.019
http	httpd 1.1		22	0.019
http	AR7 embedded httpd		22	0.019
ftp	Synology DiskStation NAS ftpd		22	0.019
ssh	OpenSSH	4.7p1 Debian 8ubuntu1.2	21	0.018
socks4	Connection ok		21	0.018
openvpn	OpenVPN		21	0.018
netbios-ssn			21	0.018
http	lighttpd	1.4.26	21	0.018
http	Boa HTTPd	0.94.11	21	0.018
ssh	OpenSSH	6.0	20	0.017
irc	ngircd		20	0.017
ftp	vsftpd	2.0.5	20	0.017
ftp	FileZilla ftpd	0.9.24 beta	20	0.017
ssh	SCS sshd	2.0.13	19	0.016
ssh	OpenSSH	5.9	19	0.016
ssh	OpenSSH	5.5	19	0.016
ssh	OpenSSH	4.3p2 Debian 9etch3	19	0.016
soap	gSOAP soap	2.7	19	0.016
http	WebLogic httpd		19	0.016
http	Cisco IOS http config		19	0.016
http	Allegro RomPager	4.51 UPnP/1.0	19	0.016
ftp	Dreambox ftpd		19	0.016
ssh	OpenSSH	5.3p1 Debian 3ubuntu6	18	0.015
ssh	OpenSSH	4.7p1 Debian 8ubuntu3	18	0.015
ssh	Cisco SSH	1.25	18	0.015
smtp	Microsoft ESMTP	6.0.3790.4675	18	0.015
java-rmi	Java RMI	3.2.1	18	0.015
http	MS .NET Remoting httpd		18	0.015
http	MiniServ	1.580	18	0.015
http	Allegro RomPager	4.07 UPnP/1.0	18	0.015
ftp	IndiFTPD		18	0.015
ftp	Gene6 ftpd	3.9.0 build 2	18	0.015
upnp	Conexant-EmWeb	6.1.0	17	0.015
ssh	OpenSSH	5.5p1 Debian 4ubuntu6	17	0.015
http	uTorrent WebUI		17	0.015
http	Sagem F@st router httpd		17	0.015
tcpwrapped	BSD TCP Wrappers		16	0.014
http-proxy	CCProxy http proxy		16	0.014
http	Network Camera		16	0.014
http	lighttpd	1.4.20	16	0.014
http	Jetty	6.1.5	16	0.014
http	Apache	2.2.15	16	0.014
ftp	SHARP MX-4100N printer ftpd	01.05.00.0k	16	0.014
ssh	OpenSSH	5.5p1 Debian 4ubuntu4	15	0.013