Overview of services running on Port 4000 TCP.
~190 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
no match	-/-	-/-	101245	53.221
http			19118	10.05
irc	Dancer ircd		4093	2.152
http	SonicWALL		3721	1.956
http	Apache	2.2.16	3304	1.737
eggdrop	Eggdrop IRC bot console	1.6.21	3167	1.665
ssh	Cisco/3com IPSSHd	6.5.0	2722	1.431
ssl	SSLv3		2624	1.379
chat	AIM or ICQ server		2456	1.291
http	wg_httpd	1.0(based Boa	2370	1.246
rifa-dvr	Rifatron DVR		1938	1.019
donkey	MLDonkey multi-network P2P server control port		1924	1.011
ssh	OpenSSH	4.3	1567	0.824
arcserve	ARCserve Discovery		1230	0.647
http	TopsecOS		1179	0.62
http	WEBrick httpd	1.3.1	1156	0.608
diablo2	Diablo 2 game server		1098	0.577
http	Apache	2.2.14	893	0.469
http	Httpd	1.0	791	0.416
http	Avtech AVN801 network camera	1.0	757	0.398
http	GeoVision GeoHttpServer for webcams		710	0.373
http	AIM	1.0	709	0.373
http	Microsoft IIS httpd	6.0	662	0.348
telnet	the MIPU Telnet Server		652	0.343
http	Apache		652	0.343
http	SNF	0.1	651	0.342
http	Cross Web Server		623	0.327
http	Thin	1.2.4	618	0.325
http	Netwave IP camera http config		607	0.319
http	Boa HTTPd	0.94.14rc21	559	0.294
http	Virata-EmWeb	6.0.1	526	0.277
http	mini_httpd	1.19 19dec2003	515	0.271
http	lighttpd	1.4.29	493	0.259
http-proxy	3proxy http proxy		489	0.257
http	Thin	1.3.1	485	0.255
http	lighttpd	1.4.19	478	0.251
http	Boa HTTPd	0.94.13	470	0.247
vnc	VNC		450	0.237
http	Apache	2.2.22	438	0.23
mysql	MySQL	5.0.51a-24+lenny5-log	434	0.228
audioworks	AudioWorks sound server		387	0.203
http	uc-httpd	1.0.0	378	0.199
http	Hikvision-Webs		377	0.198
http	Apache	2.2.15	319	0.168
http	Apache Tomcat/Coyote JSP engine	1.1	286	0.15
http	D-Link DIR-300 WAP http admin		280	0.147
http	Draytek Vigor ADSL router webadmin		267	0.14
http	ALT-N SecurityGateway httpd	2.0.7	254	0.134
http	Microsoft HTTPAPI httpd	2.0	240	0.126
http	GoAhead-Webs httpd		233	0.122
http	Microsoft IIS httpd	7.5	222	0.117
http	Gadspot/Avtech AV787 webcam http config		218	0.115
http	TBS	R2 UPnP	210	0.11
telnet			204	0.107
socks-proxy	Socks4A		203	0.107
http	Apache	1.3.22	197	0.104
http	PDR-M800	1.0	194	0.102
mysql	MySQL	4.1.18	191	0.1
http	Thin	1.4.1	189	0.099
http	thin 1.2.11 codename Bat-Shit Crazy		189	0.099
svnserve	Subversion		182	0.096
http	Mongrel httpd	1.1.5	175	0.092
http	DVR Systems webcam http interface		175	0.092
ftp	Microsoft ftpd		175	0.092
telnet	Linux telnetd		170	0.089
http	thttpd	2.25b 29dec2003	170	0.089
http	Microsoft IIS httpd		169	0.089
http	Apache	2.2.3	168	0.088
http	Mbedthis-Appweb	2.0.4	165	0.087
http	Apache	1.3.6	156	0.082
http	GoAhead-Webs embedded httpd		153	0.08
irc-proxy	ShroudBNC irc-proxy	1.2 revision 1080	152	0.08
ssh			151	0.079
http	thttpd		150	0.079
telnet	MLDonkey telnetd	3.1.0	145	0.076
http	WangWnagSimpleServer	1.0	144	0.076
http	Gemtek	0.899	139	0.073
http	lighttpd	1.4.26	138	0.073
http	GoldStar iPECS 50B PBX http config		132	0.069
http	Microsoft IIS httpd	5.0	131	0.069
remoting	MS .NET Remoting services		130	0.068
http	IBM_HTTP_Server	6.0.2.27 Apache	126	0.066
http	Secure Computing Sidewinder firewall http admin		122	0.064
vnc	RealVNC Personal		121	0.064
irc	Unreal ircd		119	0.063
http-proxy	EZproxy web proxy		116	0.061
ericom	Ericom PowerTermWebConnect	1.0	116	0.061
upnp	Portable SDK for UPnP devices	1.3.1	113	0.059
http	Microsoft IIS httpd	7.0	112	0.059
http	DrcomServer1.0		109	0.057
http	Apache	2.2.8	106	0.056
telnet	SMC SMC2870W Wireless Ethernet Bridge		100	0.053
http	lighttpd	1.4.28	99	0.052
http	Apache	2.2.9	99	0.052
http	Catalyst Framework httpd	5.90007	95	0.05
http	Apache	2.2.2	95	0.05
ice	Internet Communications Engine		94	0.049
http	lighttpd	1.4.20	93	0.049
http	Apache	2.2.17	93	0.049
ftp			93	0.049
telnet	MLDonkey telnetd	3.0.7	91	0.048
http	Airlink 101 or TRENDnet TVIP-422w webcam http config		90	0.047
ntop-http	Ntop web interface	3.3	86	0.045
shoutcast	SHOUTcast server	1.9.8	85	0.045
http	Apache	2.2.13	85	0.045
http	ALT-N SecurityGateway httpd	2.0.6	84	0.044
vnc			82	0.043
soap	gSOAP soap	2.6	81	0.043
http	Apache	2.2.21	81	0.043
http	thttpd	2.25b	80	0.042
http	RemotelyAnywhere remote PC management httpd	8.0.668	80	0.042
http	OracleAS Web Cache 10g	9.0.4.0.0	80	0.042
http	Netgear DG834 router http config		80	0.042
http	Apache	1.3.9 (Unix) (Red Hat	79	0.042
http	thttpd	2.24 26oct2003	78	0.041
telnet	MLDonkey telnetd	2.9.3	77	0.04
http	uTorrent WebUI		77	0.04
http	Network Camera		76	0.04
http	Techno Vision Security System http config	2.0	75	0.039
http	nginx	1.0.10	74	0.039
telnet	MLDonkey telnetd	3.0.3	73	0.038
http	Microsoft IIS httpd	5.1	73	0.038
ssh	OpenSSH	5.3	72	0.038
http	WindWeb	2.0	70	0.037
telnet	MLDonkey telnetd	3.0.0	69	0.036
ssl	TLS	1.0	69	0.036
telnet	MLDonkey telnetd	3.0.6	68	0.036
http	Netgear DG834G router http config		68	0.036
http	GM Streaming Server httpd		68	0.036
rtsp			67	0.035
http	Ubuntu	lucid UPnP	67	0.035
ssh	OpenSSH	5.1p1 Debian 5	65	0.034
http	Thin	1.2.7	64	0.034
http	MS .NET Remoting httpd		64	0.034
http	World Client WDaemon httpd	4.0	61	0.032
http	streamts		60	0.032
telnet	MLDonkey telnetd	3.0.0.CVS	58	0.03
ssh	OpenSSH	3.9p1	58	0.03
http	Allegro RomPager	4.07 UPnP/1.0	58	0.03
secure-socket	CA Secure Socket Adapter		57	0.03
vnc	RealVNC Enterprise		53	0.028
telnet	MLDonkey telnetd	3.0.1	53	0.028
activemq	Apache ActiveMQ		51	0.027
upnp	Microsoft Windows UPnP		50	0.026
ssh	OpenSSH	5.5p1 Debian 6+squeeze2	50	0.026
directconnect	Direct Connect P2P		50	0.026
http-proxy	MikroTik http proxy		49	0.026
http	Boa httpd		48	0.025
socks5			47	0.025
http	dcs-lig-httpd		47	0.025
ftp	FileZilla ftpd	0.9.41 beta	46	0.024
http	Allegro RomPager	4.51 UPnP/1.0	45	0.024
tandem-print	Sharp printer tandem printing		44	0.023
http	TwistedWeb httpd	8.2.0	44	0.023
http	TRENDnet TV-IP100 or TV-IP110 webcam display httpd		44	0.023
http	Apache	1.3.28	44	0.023
http	thttpd	2.24	43	0.023
http	ALT-N SecurityGateway httpd	2.0.4	42	0.022
ftp	Serv-U ftpd		42	0.022
http	nginx		41	0.022
http	Apache	1.3.41	40	0.021
ftp	Pure-FTPd		40	0.021
http	uClinux-httpd	0.2.2	38	0.02
telnet	MLDonkey telnetd	3.1.1	37	0.019
http-proxy	CCProxy http proxy		37	0.019
http	nginx	0.8.54	37	0.019
telnet	MLDonkey telnetd	3.1.2	36	0.019
http-proxy	Squid http proxy	2.7.STABLE9	36	0.019
http	Vivotek IP7131 Network Camera http config		35	0.018
http	lighttpd		35	0.018
http	GoAhead-Webs		35	0.018
http	Apache	2.2.11	35	0.018
http	TP-LINK Router		34	0.018
http	Node.js		34	0.018
http	DVR		34	0.018
ftp	vsftpd	2.0.8 or later	34	0.018
ssh	Dropbear sshd	0.52	33	0.017
http	Intoto httpd	1.0	33	0.017
ssl	Microsoft IIS SSL		32	0.017
http	MiniServ	0.01	32	0.017
openvpn	OpenVPN		31	0.016
http	WYM httpd	1.0	31	0.016
xml			30	0.016
ssh	OpenSSH	5.3p1 Debian 3ubuntu7	30	0.016
ssh	OpenSSH	4.3p2	30	0.016
rtsp	Avtech MPEG4 DVR control rtspd		30	0.016
http	QNAP TS-219P NAS http config	1.0	30	0.016
http	DD-WRT milli_httpd		30	0.016
http	TRENDnet TV-IP110w or TV-IP422W webcam display httpd		29	0.015
http	MS-SDK-HttpServer	1.0	29	0.015
http	ImagiaTek		29	0.015
ftp	MikroTik router ftpd	3.30	29	0.015
http	Jetty	6.1.x	28	0.015
http	HTTPServer		28	0.015
telnet	MLDonkey telnetd	2.9.5.CVS	27	0.014
smtp	Postfix smtpd		27	0.014
http	RemotelyAnywhere remote PC management httpd	10.0.1086	27	0.014
http	PasteWSGIServer	0.5	27	0.014
http	Linksys router http config		27	0.014
http	Apache	2.0.53	27	0.014
donkey	MLDonkey multi-network P2P server control port	2.8.2	27	0.014
ssh	OpenSSH	5.9p1 Debian 5ubuntu1	26	0.014
ssh	OpenSSH	5.8	26	0.014
http	Netgear DG834GT router http config		26	0.014
http	MiniServ	1.580	26	0.014
http	MikroTik router config httpd		26	0.014
http	Icecast streaming media server		26	0.014
http	httpd 1.1		26	0.014
vnc-http	Ultr@VNC		24	0.013
lns	Legalis Intranet legal information server		24	0.013
http	Vivotek 3102 Camera http config		24	0.013
http	TRMB	1.0	24	0.013
http	MoxaHttp	1.0	24	0.013
http	Apache	2.0.54	24	0.013
telnet	the MRV Communications' LX Series Server		23	0.012
mysql	MySQL		23	0.012
http	W3MFC	1.68	23	0.012
http	Router		23	0.012
http	nginx	1.0.0	23	0.012
http	Apache	2.2.6	23	0.012
ssh	OpenSSH	5.4p1	22	0.012
http	Z-World Rabbit		22	0.012
http	httpd		22	0.012
telnet	the MRV Communications' LX Series Console Server		21	0.011
telnet	MLDonkey telnetd	2.9.5	21	0.011
ssh	Cisco SSH	1.25	21	0.011
smtp	Microsoft Exchange smtpd		21	0.011
nntp	INN nntpd		21	0.011
netbios-ssn			21	0.011
http-proxy	Squid http proxy	2.6.STABLE21	21	0.011
http	Microsoft HTTPAPI httpd	1.0	21	0.011
http	HP Integrated Lights-Out http config		21	0.011
http	D-Link/Airlink IP webcam http config	1.0	21	0.011
http	Boa HTTPd	0.93.15	21	0.011
http	Apache	0.6.5	21	0.011
ssh	OpenSSH	5.8p1 Debian 7ubuntu1	20	0.011
http	nginx	1.2.1	20	0.011
http	nginx	0.7.67	20	0.011
http	http server 1.0		20	0.011
http	Apache	2.2.20	20	0.011
http	Apache	1.3.27	20	0.011
ftp	Gene6 ftpd	3.9.0 build 2	20	0.011
ssh	OpenSSH	5.5p1 Debian 6+squeeze1	19	0.01
ssh	OpenSSH	5.2	19	0.01
http	Vivotek Network Camera		19	0.01
http	http server	everfocus	19	0.01
http	Apache	2.2.4	19	0.01
ftp	ProFTPD	1.3.1	19	0.01
ftp	ProFTPD		19	0.01
telnet	Efficient router telnetd	5.3.20	18	0.009
http	uhttpd	1.0.0	18	0.009
http	thttpd	2.23beta1 26may2002	18	0.009
http	T-Com Speedport W 501V WAP http config		18	0.009
ftp	vsftpd (before 2.0.8) or WU-FTPD		18	0.009
ftp	Microsoft ftpd	5.0	18	0.009
smtp			17	0.009
http	Thin	1.2.8	17	0.009
http	Thin	1.2.5	17	0.009
http	Sagem F@st router httpd		17	0.009
http	ProvideX-WebServer	1.3.16	17	0.009
http	NEC Electra Elite IPK II WebPro		17	0.009
http	Mobotix Camera http config		17	0.009
http	Lantronix XPort embedded ethernet http config		17	0.009
http	DreamConnection WebServer V0.2		17	0.009
http	CherryPy httpd	3.2.0	17	0.009
ftp	FileZilla ftpd	0.9.40 beta	17	0.009
vnc	Apple remote desktop vnc		16	0.008
telnet	MLDonkey telnetd	3.1.0.CVS	16	0.008
telnet	Draytek Vigor ADSL router telnetd		16	0.008
ssh	Dropbear sshd	0.51	16	0.008
smtp	Microsoft ESMTP	6.0.3790.4675	16	0.008
http	Wireless Network Camera		16	0.008
http	WebServer		16	0.008
http	Ubicom httpd	1.1	16	0.008
http-proxy	F5 BIG-IP load balancer http proxy		16	0.008
http	Jetty	6.1.5	16	0.008
http	build-in http server		16	0.008
http	Apache	2.2.19	16	0.008
http	Apache	1.3.33	16	0.008
ftp	FileZilla ftpd	0.9.37 beta	16	0.008
telnet	MLDonkey telnetd	2.9.6	15	0.008
ssh	OpenSSH	5.8p2_hpn13v11	15	0.008
ssh	OpenSSH	5.5	15	0.008
http	WebFS httpd	1.21	15	0.008
http	T-Com Speedport W 501V http config		15	0.008
http	RemotelyAnywhere remote PC management httpd	8.0.605	15	0.008
http	Oracle-Web-Cache	10g (10.1.2)	15	0.008
http	MultView WEB Server V1.1		15	0.008
http	D-Link DCS-920 webcam http config		15	0.008
http	D-Link DCS-910 webcam http config		15	0.008
http	Buffalo AirStation http config		15	0.008
http	Apache	2.0.55	15	0.008
http	ALT-N SecurityGateway httpd	2.0.2	15	0.008
http	4D_v12 httpd	12.3.0	15	0.008
ftp	FileZilla ftpd	0.9.29 beta	15	0.008