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	Count	Percent
no match	-/-	101245	53.221
http		19118	10.05
http	Apache	7207	3.788
irc	Dancer ircd	4093	2.152
http	SonicWALL	3721	1.956
eggdrop	Eggdrop IRC bot console	3170	1.666
ssh	Cisco/3com IPSSHd	2722	1.431
ssl	SSLv3	2624	1.379
chat	AIM or ICQ server	2456	1.291
http	wg_httpd	2370	1.246
ssh	OpenSSH	2302	1.21
donkey	MLDonkey multi-network P2P server control port	1956	1.028
rifa-dvr	Rifatron DVR	1938	1.019
http	Thin	1408	0.74
http	lighttpd	1384	0.728
http	Microsoft IIS httpd	1369	0.72
arcserve	ARCserve Discovery	1230	0.647
http	TopsecOS	1179	0.62
http	WEBrick httpd	1156	0.608
http	Boa HTTPd	1099	0.578
diablo2	Diablo 2 game server	1098	0.577
telnet	MLDonkey telnetd	839	0.441
mysql	MySQL	819	0.431
http	Httpd	791	0.416
http	Avtech AVN801 network camera	757	0.398
http	GeoVision GeoHttpServer for webcams	710	0.373
http	AIM	709	0.373
telnet	the MIPU Telnet Server	652	0.343
http	SNF	651	0.342
http	thttpd	643	0.338
http	Cross Web Server	623	0.327
http	Netwave IP camera http config	607	0.319
http	Virata-EmWeb	534	0.281
http	mini_httpd	527	0.277
http-proxy	3proxy http proxy	489	0.257
vnc	VNC	450	0.237
http	ALT-N SecurityGateway httpd	424	0.223
audioworks	AudioWorks sound server	387	0.203
http	uc-httpd	378	0.199
http	Hikvision-Webs	377	0.198
http	nginx	351	0.185
http	Apache Tomcat/Coyote JSP engine	286	0.15
http	D-Link DIR-300 WAP http admin	280	0.147
http	Draytek Vigor ADSL router webadmin	267	0.14
http	Microsoft HTTPAPI httpd	261	0.137
http	GoAhead-Webs httpd	233	0.122
http	Gadspot/Avtech AV787 webcam http config	218	0.115
http	Mongrel httpd	212	0.111
http	TBS	210	0.11
telnet		204	0.107
socks-proxy	Socks4A	203	0.107
http	PDR-M800	194	0.102
ftp	Microsoft ftpd	193	0.101
http	thin 1.2.11 codename Bat-Shit Crazy	189	0.099
svnserve	Subversion	182	0.096
http	RemotelyAnywhere remote PC management httpd	180	0.095
http	DVR Systems webcam http interface	175	0.092
http	Mbedthis-Appweb	172	0.09
telnet	Linux telnetd	170	0.089
irc-proxy	ShroudBNC irc-proxy	155	0.081
http	GoAhead-Webs embedded httpd	153	0.08
ssh		151	0.079
http	WangWnagSimpleServer	144	0.076
http	Gemtek	139	0.073
http-proxy	Squid http proxy	134	0.07
http	GoldStar iPECS 50B PBX http config	132	0.069
remoting	MS .NET Remoting services	130	0.068
http	World Client WDaemon httpd	126	0.066
http	IBM_HTTP_Server	126	0.066
ftp	FileZilla ftpd	124	0.065
http	Secure Computing Sidewinder firewall http admin	122	0.064
vnc	RealVNC Personal	121	0.064
ftp	ProFTPD	120	0.063
irc	Unreal ircd	119	0.063
http	Allegro RomPager	118	0.062
http-proxy	EZproxy web proxy	116	0.061
ericom	Ericom PowerTermWebConnect	116	0.061
upnp	Portable SDK for UPnP devices	114	0.06
http	OracleAS Web Cache 10g	114	0.06
http	DrcomServer1.0	109	0.057
ntop-http	Ntop web interface	107	0.056
http	Catalyst Framework httpd	102	0.054
telnet	SMC SMC2870W Wireless Ethernet Bridge	100	0.053
shoutcast	SHOUTcast server	100	0.053
http	Jetty	97	0.051
ice	Internet Communications Engine	94	0.049
ftp		93	0.049
soap	gSOAP soap	92	0.048
http	Airlink 101 or TRENDnet TVIP-422w webcam http config	90	0.047
vnc		82	0.043
http	Netgear DG834 router http config	80	0.042
http	MiniServ	79	0.042
http	uTorrent WebUI	77	0.04
http	Network Camera	76	0.04
ssh	Dropbear sshd	75	0.039
http	Techno Vision Security System http config	75	0.039
http	WindWeb	72	0.038
ssl	TLS	69	0.036
ftp	Serv-U ftpd	69	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	67	0.035
http	MS .NET Remoting httpd	64	0.034
http	TwistedWeb httpd	62	0.033
http	streamts	60	0.032
secure-socket	CA Secure Socket Adapter	57	0.03
vnc	RealVNC Enterprise	53	0.028
activemq	Apache ActiveMQ	51	0.027
upnp	Microsoft Windows UPnP	50	0.026
http	Indy	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
tandem-print	Sharp printer tandem printing	44	0.023
http	TRENDnet TV-IP100 or TV-IP110 webcam display httpd	44	0.023
ftp	Pure-FTPd	40	0.021
http	GoAhead-Webs	39	0.021
http	uClinux-httpd	38	0.02
http-proxy	CCProxy http proxy	37	0.019
ftp	vsftpd	36	0.019
http	Vivotek IP7131 Network Camera http config	35	0.018
http	TP-LINK Router	34	0.018
http	Node.js	34	0.018
http	DVR	34	0.018
http	Intoto httpd	33	0.017
ftp	MikroTik router ftpd	33	0.017
ftp	Gene6 ftpd	33	0.017
ssl	Microsoft IIS SSL	32	0.017
http	Rex media encoder http config	32	0.017
openvpn	OpenVPN	31	0.016
http	WYM httpd	31	0.016
http	ProvideX-WebServer	31	0.016
xml		30	0.016
rtsp	Avtech MPEG4 DVR control rtspd	30	0.016
http	QNAP TS-219P NAS http config	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	29	0.015
http	ImagiaTek	29	0.015
http	CherryPy httpd	29	0.015
smtp	Microsoft ESMTP	28	0.015
http	HTTPServer	28	0.015
smtp	Postfix smtpd	27	0.014
http	W3MFC	27	0.014
http	PasteWSGIServer	27	0.014
http	Linksys router http config	27	0.014
http	Netgear DG834GT router http config	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	24	0.013
http	MoxaHttp	24	0.013
telnet	the MRV Communications' LX Series Server	23	0.012
http	Router	23	0.012
http	httpd	23	0.012
http	4D_v12 httpd	23	0.012
irc-proxy	psyBNC	22	0.012
http	Z-World Rabbit	22	0.012
http	WebServer	22	0.012
telnet	the MRV Communications' LX Series Console Server	21	0.011
ssh	Cisco SSH	21	0.011
smtp	Microsoft Exchange smtpd	21	0.011
nntp	INN nntpd	21	0.011
netbios-ssn		21	0.011
http	HP Integrated Lights-Out http config	21	0.011
http	D-Link/Airlink IP webcam http config	21	0.011
http	http server 1.0	20	0.011
eggdrop	Eggdrop irc bot console	20	0.011
telnet	Efficient router telnetd	19	0.01
http	Vivotek Network Camera	19	0.01
http	uhttpd	19	0.01
http	Oracle-Web-Cache	19	0.01
http	http server	19	0.01
telnet	CircleMUD telnetd	18	0.009
http	T-Com Speedport W 501V WAP http config	18	0.009
http	HttpFileServer httpd	18	0.009
ftp	vsftpd (before 2.0.8) or WU-FTPD	18	0.009
smtp		17	0.009
http	Sagem F@st router httpd	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	CCcam card sharing system http config	17	0.009
vnc	Apple remote desktop vnc	16	0.008
telnet	Draytek Vigor ADSL router telnetd	16	0.008
http	Wireless Network Camera	16	0.008
http	Ubicom httpd	16	0.008
http-proxy	F5 BIG-IP load balancer http proxy	16	0.008
http	build-in http server	16	0.008
ssh	SunSSH	15	0.008
http	WebFS httpd	15	0.008
http	T-Com Speedport W 501V http config	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	Caucho Resin JSP engine	15	0.008
http	Buffalo AirStation http config	15	0.008
vnc-http	RealVNC	14	0.007
ssh	WeOnlyDo sshd	14	0.007
ssh	Bitvise WinSSHD	14	0.007
http	WindRiver-WebServer	14	0.007
http	uTorrent utserver web interface	14	0.007
http	TornadoServer	14	0.007
http	Microsoft ISA httpd	14	0.007
http	Gnway Web Server	14	0.007
citrix-ica	Citrix Metaframe XP ICA	14	0.007
telnet	Cisco 1721 router telnetd	13	0.007
telnet	Allied Telesis x900-series switch telnetd	13	0.007
ssl	TLSv1	13	0.007
http	OwnServer1.0	13	0.007
vnc-http	VNC Server Enterprise Edition httpd	12	0.006
ssh	MikroTik RouterOS sshd	12	0.006
insight-manager	Consul InSight Manager	12	0.006
http	webserver	12	0.006
http	WebLogic httpd	12	0.006
http	webcamXP httpd	12	0.006
http	TeamViewer httpd	12	0.006
http	statusd	12	0.006
http	Net-OS 5.xx UPnP	12	0.006
http	Microsoft-HTTPAPI	12	0.006
http	HTTP Software 1.1	12	0.006
http	AIM HTTP	12	0.006
memcache	memcached	11	0.006
http	Oracle 9iAS Web Cache	11	0.006
http	NetTalk-WebServer	11	0.006
http	emBetter	11	0.006
http	Dreambox httpd	11	0.006
damewaremr	DameWare Mini Remote Control	11	0.006
storagecraft-image	StorageCraft Image Manager	10	0.005
http	VPON Server	10	0.005
http	Ubicom	10	0.005
http	Transmission BitTorrent management httpd	10	0.005
http	SonicWALL firewall http config	10	0.005
http	m0n0wall FreeBSD firewall web interface	10	0.005
http	Lotus Domino httpd	10	0.005
http	Keil-EWEB	10	0.005
http	David WebBox httpd	10	0.005
bandwidth-test	MikroTik bandwidth-test server	10	0.005