Overview of services running on Port 50000 TCP.
~197 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			61520	31.207
ftp	NcFTPd		47886	24.291
no match	-/-	-/-	37813	19.181
http	thttpd		11313	5.739
http	SonicWALL		3488	1.769
chat	AIM or ICQ server		2576	1.307
telnet	Alcatel/Thomson SpeedTouch DSL router admin interface		2316	1.175
telnet	Sony PCS-G50 telnetd		1489	0.755
http	NetEngine Server 1.0		1484	0.753
http-proxy	3Proxy http proxy		1385	0.703
upnp	SuperMicro IPMI UPnP		1206	0.612
telnet	Sony PCS-1 telnetd		902	0.458
telnet	Linux telnetd		842	0.427
http	Panasonic BB-HCM331 Network Camera http config		757	0.384
msdtc	Microsoft Distributed Transaction Coordinator		696	0.353
http	AIM	1.0	661	0.335
http	uTorrent WebUI		535	0.271
ssh	OpenSSH	4.3	521	0.264
http	Microsoft HTTPAPI httpd	2.0	520	0.264
http	Apache		511	0.259
http	lighttpd	1.4.19	435	0.221
soap	gSOAP soap	2.7	428	0.217
ssl	TLS	1.0	420	0.213
http	Microsoft IIS httpd		419	0.213
http	SAP J2EE Engine httpd	7.00	405	0.205
http	MiniServ	0.01	394	0.2
http	SAP J2EE Engine httpd	7.01	358	0.182
vnc	VNC		332	0.168
http	mini_httpd	1.19 19dec2003	298	0.151
http	OpenMG Authentication Server		287	0.146
http	Boa HTTPd	0.94.14rc21	276	0.14
socks5			259	0.131
http	Apache Tomcat/Coyote JSP engine	1.1	230	0.117
http	lighttpd	1.4.29	227	0.115
http	Netwave IP camera http config		215	0.109
ssh	OpenSSH	5.3p1 Debian 3ubuntu7	210	0.107
http	SAP J2EE Engine httpd	7.02	203	0.103
telnet	Sony PCS-G70 telnetd		184	0.093
ssh			177	0.09
http	ZNC IRC bouncer http config	0.097 or later	175	0.089
http	Avtech AVN801 network camera	1.0	169	0.086
http	Apache	2.2.22	166	0.084
remoting	MS .NET Remoting services		163	0.083
irc-proxy	psyBNC	2.3.2-7	151	0.077
http	lighttpd		150	0.076
http	thttpd	2.25b	144	0.073
http	MiniServ	1.590	142	0.072
http	Panasonic WV-NS202A webcam http config		140	0.071
http	Apache	2.2.13	140	0.071
ftp	Microsoft ftpd		140	0.071
ftp	FileZilla ftpd	0.9.41 beta	134	0.068
ftp			131	0.066
ssh	OpenSSH	5.5p1 Debian 6+squeeze2	127	0.064
honeywell-ripsd	Honeywell ripsd power management server		125	0.063
http	MiniServ	1.580	124	0.063
ssh	OpenSSH	5.3	122	0.062
http	DrcomServer1.0		120	0.061
http	GoAhead-Webs httpd		117	0.059
upnp	Portable SDK for UPnP devices	1.6.6	115	0.058
telnet	Sony PCS-TL30 telnetd		114	0.058
http	Apache	2.2.14	113	0.057
http	MMadmServ	MMadmServ	111	0.056
irc-proxy	psyBNC	2.3.2-9	100	0.051
http	Apache	2.2.3	100	0.051
http	Apache	2.2.17	100	0.051
http	Apache	1.3.6	100	0.051
telnet	Sony PCS-TL50 telnetd		95	0.048
ssh	OpenSSH	5.9p1 Debian 5ubuntu1	92	0.047
telnet	Sony PCS-11 telnetd		91	0.046
http	GoAhead-Webs		91	0.046
pcanywheredata	Symantec pcAnywhere		89	0.045
ftp	FileZilla ftpd	0.9.40 beta	89	0.045
eggdrop	Eggdrop IRC bot console	1.6.20	87	0.044
http	Httpd	1.0	84	0.043
http	WangWnagSimpleServer	1.0	80	0.041
ssh	OpenSSH	3.9p1	79	0.04
http	Panasonic webcam http config		78	0.04
ftp	Pure-FTPd		76	0.039
http	Apache	2.2.16	73	0.037
http	thttpd	2.25b 29dec2003	72	0.037
http	D-Link DIR-300 WAP http admin		71	0.036
irc-proxy	dircproxy		69	0.035
xml			68	0.034
http	micro_httpd		68	0.034
http	Allegro RomPager	4.51 UPnP/1.0	68	0.034
donkey	MLDonkey multi-network P2P server		68	0.034
upnp	Intel UPnP reference SDK	1.6.6	67	0.034
http	Mbedthis-Appweb	2.0.4	67	0.034
http	GoAhead-Webs embedded httpd		67	0.034
http	Boa HTTPd	0.94.13	65	0.033
backdoor	OptixPro backdoor		65	0.033
http	Hikvision-Webs		63	0.032
http	Polycom SoundPoint VoIP phone http config		62	0.031
http	Muratec Server Ver.1.1		61	0.031
telnet			60	0.03
sybase-adaptive	Sybase Adaptive Server		60	0.03
http	NET-DK	1.0	59	0.03
http	WYM httpd	1.0	58	0.029
http	uc-httpd	1.0.0	58	0.029
http	Microsoft IIS httpd	5.1	58	0.029
http	Boa HTTPd	0.93.15	56	0.028
http	MikroTik router config httpd		55	0.028
http	http server 1.0		55	0.028
vnc	RealVNC Personal		54	0.027
ftp	FileZilla ftpd	0.9.37 beta	54	0.027
vnc			52	0.026
http	lighttpd	1.4.28	51	0.026
ssh	OpenSSH	5.8p1 Debian 1ubuntu3	50	0.025
http	ver2.4 rev0		48	0.024
http	Microsoft HTTPAPI httpd	1.0	48	0.024
http	HTTP Server 1.0		48	0.024
vnc	RealVNC Enterprise		47	0.024
ssh	OpenSSH	5.1p1 Debian 6ubuntu2	47	0.024
http	Apache	2.2.15	47	0.024
ftp	ProFTPD	1.3.3	47	0.024
http	GeoVision GeoHttpServer for webcams		46	0.023
ftp	FileZilla ftpd	0.9.39 beta	46	0.023
http	GM Streaming Server httpd		45	0.023
http	Microsoft IIS httpd	6.0	44	0.022
http	FLPS		44	0.022
ssh	OpenSSH	5.8p1 Debian 7ubuntu1	43	0.022
http	DISKPUMP mobile download server	0.9.6 - gyHong	43	0.022
http	Buffalo AirStation http config		42	0.021
ssh	OpenSSH	5.1p1 Debian 5	41	0.021
http	PDR-M800	1.0	41	0.021
http	MiniServ	1.570	41	0.021
arcserve	ARCserve Discovery		41	0.021
ssh	OpenSSH	5.5p1 Debian 4ubuntu6	40	0.02
irc-proxy	psyBNC	2.3.1	40	0.02
http	SAP J2EE Engine httpd	6.40	40	0.02
http	SAP J2EE Engine		39	0.02
http	Jetty	6.1.5	39	0.02
http	Cross Web Server		39	0.02
http	TibetSystem Server 2.0		38	0.019
http	Router		38	0.019
http	MiniServ	1.550	38	0.019
bittorrent	Bittorrent P2P client		38	0.019
http	Jetty	6.1.x	36	0.018
ssh	OpenSSH	4.2	35	0.018
netbios-ssn			34	0.017
http	Intoto httpd	1.0	34	0.017
http	TP-LINK Router		33	0.017
ssh	OpenSSH	5.5p1 Debian 6+squeeze1	32	0.016
ssh	Dropbear sshd	0.52	32	0.016
pyro	Python Remote Object Nameserver		32	0.016
ssh	OpenSSH	6.0	30	0.015
napster	WinMX or Lopster Napster P2P client		30	0.015
http	Apache	2.2.21	30	0.015
http	MikroTik router http config		29	0.015
smtp			28	0.014
http	Indy httpd	9.0.18	28	0.014
http	Apache	2.2.9	28	0.014
http	RemotelyAnywhere remote PC management httpd	8.0.668	27	0.014
ssh	OpenSSH	5.8	26	0.013
openvpn	OpenVPN		26	0.013
http	TwistedWeb httpd	8.2.0	26	0.013
http	POSIX		26	0.013
ssh	OpenSSH	5.1	25	0.013
ssh	OpenSSH	4.7p1 Debian 8ubuntu3	25	0.013
http	Apache	2.2	25	0.013
http	Apache	1.3.41	25	0.013
ssh	OpenSSH	5.4p1	24	0.012
http-proxy	Squid http proxy		24	0.012
http	Draytek Vigor ADSL router webadmin		24	0.012
http	Apache	2.2.8	24	0.012
ssh	OpenSSH	5.9	23	0.012
http	Transas-NavTech-Server	1.02.0034 Transas-Configuration	23	0.012
http	QNAP TS-219P NAS http config	1.0	23	0.012
ftp	Serv-U ftpd	6.4	23	0.012
ftp	ProFTPD		23	0.012
ssh	OpenSSH	5.5p1 Debian 6	22	0.011
rifa-dvr	Rifatron DVR		22	0.011
http	Router Webserver		22	0.011
http	Microsoft IIS		22	0.011
http	DD-WRT milli_httpd		22	0.011
http	ADH-Web httpd		22	0.011
directconnect	Direct Connect P2P		22	0.011
upnp	MediaTomb UPnP	0.11.0	21	0.011
smtp	Postfix smtpd		21	0.011
secure-socket	CA Secure Socket Adapter		21	0.011
http	TRENDnet TV-IP100 or TV-IP110 webcam display httpd		21	0.011
http	lighttpd	1.4.11	21	0.011
http	iCanWebServer	1.1	21	0.011
http	httpd 1.1		21	0.011
http	D-Link/Airlink IP webcam http config	1.0	21	0.011
http	ChipPC Extreme httpd		21	0.011
ssh	OpenSSH	4.7	20	0.01
http	Mobotix Camera http config		20	0.01
http	MiniServ	1.560	20	0.01
http	fec	1.0 (Funkwerk BOSS)	20	0.01
upnp	Portable SDK for UPnP devices	1.3.1	19	0.01
ssh	OpenSSH	5.2p1	19	0.01
http	Web		19	0.01
http	Transas-NavTech-Server	1.03.0045 Transas-Configuration	19	0.01
http	Microsoft IIS httpd	7.5	19	0.01
http	lighttpd	1.4.23	19	0.01
http	dcs-lig-httpd		19	0.01
http	Apache	1.3.28	19	0.01
ftp	ProFTPD	1.3.4a	19	0.01
http	thttpd	2.19-MX Jul 1 2010	18	0.009
http	Sagem F@st router httpd		18	0.009
http	RapidLogic httpd	1.1	17	0.009
http	lighttpd	1.4.20	17	0.009
http	httpd		17	0.009
http	BBVS	BBVS	17	0.009
http	Apache	0.6.5	17	0.009
ftp	Synology DiskStation NAS ftpd		17	0.009
ftp	Serv-U ftpd	6.0	17	0.009
ftp	ProFTPD	1.3.1	17	0.009
ftp	Gene6 ftpd	3.10.0 build 2	17	0.009
ftp	FileZilla ftpd	0.9.36 beta	17	0.009
ssh	OpenSSH	5.8p2_hpn13v11	16	0.008
ssh	OpenSSH	5.2	16	0.008
http	Milestone XProtect video surveillance http interface		16	0.008
http	CCcam card sharing system http config		16	0.008
ssh	OpenSSH	6.0p1 Debian 2	15	0.008
ssh	OpenSSH	5.3p1 Debian 3ubuntu4	15	0.008
smtp	Microsoft ESMTP	6.0.3790.4675	15	0.008
http	thttpd	2.19-MX Oct 19 2011	15	0.008
http	Small Home Server httpd		15	0.008
http	MiniServ	1.588	15	0.008
http	Microsoft IIS httpd	5.0	15	0.008
http	Airlink 101 or TRENDnet TVIP-422w webcam http config		15	0.008
ftp	vsftpd	2.2.2	15	0.008
ftp	vsftpd	2.0.8 or later	15	0.008
ftp	glFTPd	2.01	15	0.008
ftp	FileZilla ftpd	0.9.34 beta	15	0.008