Overview of services running on Port 8004 TCP.
~53 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
http			9238	17.136
no match	-/-	-/-	5341	9.907
irc	Dancer ircd		4060	7.531
http	SonicWALL		3763	6.98
chat	AIM or ICQ server		2126	3.944
shoutcast	SHOUTcast server	1.9.8	1293	2.398
http	Microsoft IIS httpd	6.0	1262	2.341
http	Apache		1216	2.256
http	Ubicom	Ubicom	1108	2.055
http	GoAhead-Webs httpd		944	1.751
http	Virata-EmWeb	6.2.0	932	1.729
http	Boa HTTPd	0.94.14rc21	852	1.58
http	lighttpd	1.4.28	757	1.404
http	AIM	1.0	725	1.345
http	Netwave webcam http config		694	1.287
xml			618	1.146
http	Boa HTTPd	0.93.15	592	1.098
http	lighttpd	1.4.30	576	1.068
http	Symantec AntiVirus Scan Engine http config		513	0.952
http	Apache Tomcat/Coyote JSP engine	1.1	468	0.868
http	lighttpd	1.4.29	458	0.85
http	lighttpd	1.4.19	422	0.783
http	Microsoft IIS httpd	7.5	402	0.746
http	lighttpd		388	0.72
ssl	TLS	1.0	379	0.703
http	Icecast streaming media server		353	0.655
http	thttpd		337	0.625
http	Netwave IP camera http config		319	0.592
http	Apache	2.2.22	305	0.566
http	Netgear FS726TP switch http config		284	0.527
http	Apache	2.2.3	265	0.492
http	nginx		251	0.466
irc-proxy	psyBNC	2.3.2-7	247	0.458
http	Tiny WebServer		230	0.427
http	Microsoft IIS httpd		226	0.419
http	thttpd	2.25b 29dec2003	218	0.404
http	mini_httpd	1.19 19dec2003	207	0.384
http	Microsoft IIS httpd	7.0	188	0.349
http	Microsoft HTTPAPI httpd	2.0	174	0.323
http	Apache	2.2.14	164	0.304
http	WindWeb	4.00	139	0.258
http	CherryPy httpd	3.1.2	139	0.258
http	Apache	2.2.16	137	0.254
http-proxy	F5 BIG-IP load balancer http proxy		135	0.25
http	Hikvision-Webs		135	0.25
http	DrcomServer1.0		129	0.239
eggdrop	Eggdrop IRC bot console	1.6.20	124	0.23
http-proxy	Squid http proxy		117	0.217
http	OpenDNS Guide		115	0.213
http	thttpd	2.24 26oct2003	111	0.206
telnet	BusyBox telnetd		109	0.202
http	lighttpd	1.4.18	107	0.198
http	Boa HTTPd	0.94.13	107	0.198
http	WEBrick httpd	1.3.1	101	0.187
http	Avtech AVN801 network camera	1.0	99	0.184
ssh			95	0.176
http	GoAhead-Webs		95	0.176
vnc	VNC		94	0.174
http	keywords 1.0.6		94	0.174
telnet			90	0.167
http	Mongrel httpd	1.1.5	89	0.165
http	uTorrent WebUI		86	0.16
http	Network Camera		82	0.152
http	lighttpd	1.4.20	82	0.152
http	Apache	2.2.8	82	0.152
http	thttpd	2.19-MX Jul 1 2010	81	0.15
http	uTorrent utserver web interface		80	0.148
http	Linux	2.x UPnP	79	0.147
http	Apache	2.2.15	75	0.139
ice	Internet Communications Engine		74	0.137
shoutcast	SHOUTcast server	1.9.5	73	0.135
http	Microsoft HTTPAPI httpd	1.0	73	0.135
http	Mobotix Camera http config		72	0.134
http	dcs-lig-httpd		72	0.134
http	Microsoft IIS httpd	5.0	71	0.132
http	Apache	2.2.21	70	0.13
http	uc-httpd	1.0.0	69	0.128
http	FC		67	0.124
ssh	OpenSSH	3.7p1	66	0.122
ftp			64	0.119
http	PDR-M800	1.0	63	0.117
http	Apache	2.2.9	63	0.117
shoutcast	SHOUTcast server	1.9.7	62	0.115
http	ADAM-6000	8.1.0019	62	0.115
http	Motion Camera httpd	3.2.7	60	0.111
http	Apache	2.2.17	60	0.111
http	thttpd	2.19-MX Oct 19 2011	59	0.109
http	MarkLogic		57	0.106
http	Jetty	6.1.25	56	0.104
http	GoAhead-Webs embedded httpd		56	0.104
http	WebLogic httpd		55	0.102
http	Boa HTTPd	0.94.14rc18	50	0.093
ftp	Microsoft ftpd		48	0.089
http	lighttpd	1.4.26	47	0.087
http	Apache	2.2.11	47	0.087
mongodb	MongoDB	0	46	0.085
http	WindWeb	2.0	44	0.082
http	uIP	1.0	43	0.08
http	GeoVision GeoHttpServer for webcams		43	0.08
http	Vivotek 3102 Camera http config		42	0.078
http	MS .NET Remoting httpd		42	0.078
shoutcast-publishing	SHOUTcast publishing port		41	0.076
http	Apache	1.3.28	41	0.076
http	thttpd	2.19-MX Dec 8 2009	40	0.074
http	Oracle HTTP Server Powered by Apache	1.3.19	40	0.074
http	Apache	1.3.27	40	0.074
http	Tornado httpd	2.2	39	0.072
http	Apache	2.3.8	38	0.07
http	CherryPy httpd	3.0.3	37	0.069
http	Apache	2	37	0.069
http-proxy	Squid http proxy	2.6.STABLE21	36	0.067
http	Microsoft IIS httpd	5.1	36	0.067
http	Mbedthis-Appweb	2.0.4	36	0.067
http	AIP250		36	0.067
http	Mbedthis-Appweb	2.4.2	35	0.065
http	nginx	1.0.11	34	0.063
http	ver2.4 rev0		33	0.061
http	thttpd	2.19-MX Sep 1 2008	33	0.061
http	D-Link/Airlink IP webcam http config	1.0	33	0.061
http	avtech	1.0..Expires	33	0.061
rtsp			32	0.059
http	Vivotek IP7131 Network Camera http config		32	0.059
http	Cisco IOS http config		32	0.059
http	Apache	2.0.53	32	0.059
remoting	MS .NET Remoting services		31	0.058
http	Snom 300 VoIP phone http config		31	0.058
http	Apache	1.3.37	31	0.058
smtp	Communigate Pro SMTP	5.4.6	30	0.056
http	thttpd	2.19-MX Sep 9 2010	30	0.056
http	MikroTik router config httpd		30	0.056
http	Cross Web Server		30	0.056
http	GM Streaming Server httpd		29	0.054
ssh	OpenSSH	5.2	28	0.052
ssh	Dropbear sshd	0.46	28	0.052
irc	Unreal ircd		28	0.052
http	Httpd	1.0	28	0.052
http	Apache	2.2.4	28	0.052
http	Airlink 101 or TRENDnet TVIP-422w webcam http config		28	0.052
giop	CORBA naming service		28	0.052
http	Wireless Network Camera		27	0.05
http	thttpd	2.19-MX Apr 26 2011	27	0.05
http	Panasonic BB-HCM331 Network Camera http config		27	0.05
http	NS700 Media Center		27	0.05
http	Allegro-Software-RomPager	4.30b3	27	0.05
ssh	OpenSSH	3.9p1	26	0.048
http	TRENDnet TV-IP100 or TV-IP110 webcam display httpd		26	0.048
http	mini_httpd		26	0.048
http	Apache	2.4.1	26	0.048
http	Apache	2.2.6	26	0.048
http	Apache	2.2.13	26	0.048
http	Allegro RomPager	4.30b3	26	0.048
http	WYM httpd	1.0	25	0.046
http	Oracle WebLogic Server		25	0.046
http	nginx	0.7.67	25	0.046
http	D-Link DIR-300 WAP http admin		25	0.046
http	DD-WRT milli_httpd		25	0.046
http	Boa HTTPd	0.92o	25	0.046
http	Webs		24	0.045
http	Apache	1.3.41	24	0.045
http	WSGIServer	0.1	23	0.043
http	Icecast streaming media server	2.3.2	23	0.043
http	Fortinet FortiGate 50B firewall http config		23	0.043
http	TornadoServer	2.1.1	22	0.041
http	nginx	1.2.1	22	0.041
http	MiniServ	0.01	22	0.041
http	lighttpd	1.4.15	22	0.041
http	TAS embbed http		21	0.039
http	lighttpd	1.4.31	21	0.039
http	lighttpd	1.4.11	21	0.039
http	Gadspot/Avtech AV787 webcam http config		21	0.039
http	Apache	1.3.33	21	0.039
vnc	RealVNC Enterprise		20	0.037
telnet	BusyBox telnetd	1.5.1 (2009-03-10 11:36:14 KST)	20	0.037
http	PasteWSGIServer	0.5	20	0.037
http	Micro-Web		20	0.037
http	Apache	1.3.39	20	0.037
ftp	vsftpd (before 2.0.8) or WU-FTPD		20	0.037
vnc			19	0.035
ssh	OpenSSH	4.3	19	0.035
http	SAP Web Application Server	1.0;700	19	0.035
http	Oracle Application Server 10g httpd	10.1.3.4.0	19	0.035
http	Microsoft-HTTPAPI	1.0	19	0.035
http	Engine 12.6.1.369		19	0.035
http	DVR Systems webcam http interface		19	0.035
shoutcast	SHOUTcast server	2.0.0.29	18	0.033
http	Vivotek Network Camera		18	0.033
http	thttpd	2.19-MX Feb 27 2009	18	0.033
http	RapidLogic httpd	1.1	18	0.033
http	Microsoft-HTTPAPI	2.0	18	0.033
http	IBM HTTP Server		18	0.033
http	Ecam	1.92	18	0.033
http	D-Link DCS-920 webcam http config		18	0.033
http	Apache	0.6.5	18	0.033
vnc	RealVNC Personal		17	0.032
http	TwistedWeb httpd	10.0.0	17	0.032
http-proxy	EZproxy web proxy		17	0.032
http	ChipPC Extreme httpd		17	0.032
http	Boa HTTPd	0.94.11	17	0.032
http	Allegro RomPager	4.06	17	0.032
http	adf_http_server	2.7.045	17	0.032
http	TRENDnet TV-IP110w or TV-IP422W webcam display httpd		16	0.03
http	Thin	1.3.1	16	0.03
http	RemotelyAnywhere remote PC management httpd	10.0.1086	16	0.03
http	nginx	0.8.54	16	0.03
http	III 100		16	0.03
http	AtHome Video Streaming Server		16	0.03
http	Apache	2.2.19	16	0.03
ftp	vsftpd	2.0.8 or later	16	0.03
upnp	Portable SDK for UPnP devices	1.3.1	15	0.028
shoutcast	SHOUTcast server	1.9.4	15	0.028
jetdirect	JetDirect		15	0.028
http	Secure Computing Sidewinder firewall http admin		15	0.028
http	Router		15	0.028
http	nginx	0.7.65	15	0.028
http	MochiWeb	1.0 (Any of you quaids got a smint	15	0.028
http	http server 1.0		15	0.028
http	D-Link DCS-2120 webcam http config		15	0.028
http	BaseHTTPServer	0.2	15	0.028
http	Apache	2.2.20	15	0.028
http	Apache	2.0.55	15	0.028