Overview of services running on Port 2001 TCP.
~385 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	Info	OS	Devicetype	Count	Percent
telnet	Cisco IOS telnetd			IOS	switch	114931	29.814
telnet						75074	19.475
telnet	Cisco 1721 router telnetd			IOS	router	57323	14.87
no match						54231	14.068
http						14681	3.808
telnet	Cisco router telnetd			IOS	router	13512	3.505
http	lf	0.7				4277	1.109
irc	Dancer ircd					4094	1.062
http	SonicWALL				firewall	3943	1.023
http	lighttpd	1.4.20				2688	0.697
chat	AIM or ICQ server					2612	0.678
http	lighttpd	1.4.28				2199	0.57
http	lighttpd	1.4.26				2106	0.546
telnet			Usually a Cisco/3com switch	IOS	switch	1854	0.481
http	Boa HTTPd	0.94.14rc21				1719	0.446
ssl	SSLv3					1684	0.437
http	Apache					1349	0.35
http	RemotelyAnywhere remote PC management httpd	8.0.668				1037	0.269
telnet	Pocket CMD telnetd					728	0.189
http	ConfSrv					713	0.185
http	AIM	1.0				690	0.179
http	lighttpd	1.4.19				594	0.154
http	Apache		HTTP Admin			567	0.147
http	Netwave IP camera http config				webcam	552	0.143
http	Microsoft IIS httpd	6.0		Windows		522	0.135
irc-proxy	ShroudBNC irc-proxy	1.1 revision 371				486	0.126
http	Apache	2.2.3	(CentOS)			463	0.12
http	lighttpd	1.4.29				451	0.117
ftp	Ipswitch notification ftpd			Windows		431	0.112
http	Gateway-Webs					411	0.107
http	Apache	2.0.55	(Win32)			407	0.106
http	RemotelyAnywhere remote PC management httpd	10.0.1086				399	0.104
http	Avtech AVN801 network camera	1.0	UPnP 1.0		webcam	360	0.093
http	GoAhead-Webs httpd					335	0.087
http	Apache	2.2.19	(CentOS)			332	0.086
ftp	vsftpd	2.0.8 or later				318	0.082
http	WangWnagSimpleServer	1.0				312	0.081
telnet	Linux telnetd			Linux		295	0.077
http	GoAhead-Webs embedded httpd					286	0.074
telnet	SMC SMC2870W Wireless Ethernet Bridge				bridge	284	0.074
http	Microsoft IIS httpd					251	0.065
ssl	TLSv1					238	0.062
http	RemotelyAnywhere remote PC management httpd	8.0.747				226	0.059
vnc	RealVNC Personal		protocol 4.0			220	0.057
vnc			protocol 3			220	0.057
http	RemotelyAnywhere remote PC management httpd	8.0.597				220	0.057
http	lf	0.1				218	0.057
ftp	Microsoft ftpd			Windows		212	0.055
http	thttpd	2.25b 29dec2003				206	0.053
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		206	0.053
http	Boa HTTPd	0.94.13				202	0.052
http	Apache Tomcat/Coyote JSP engine	1.1				201	0.052
rtsp						194	0.05
http	Apache	2.0.55				193	0.05
http	mini_httpd	1.19 19dec2003				186	0.048
http	uc-httpd	1.0.0				162	0.042
http	GeoVision GeoHttpServer for webcams				webcam	150	0.039
http	webserver	1.0				149	0.039
http	Cross Web Server					146	0.038
http	Microsoft IIS httpd	7.5		Windows		144	0.037
telnet	corporate network!					141	0.037
ftp	vsftpd (before 2.0.8) or WU-FTPD					139	0.036
http	Hikvision-Webs					132	0.034
irc-proxy	psyBNC	2.3.2-7				130	0.034
remoting	MS .NET Remoting services					129	0.033
http	thttpd		Panasonic BB-HCM511 IP camera http config			124	0.032
ssh	OpenSSH	4.3	protocol 2.0			123	0.032
telnet	PE-4 Router					119	0.031
http	DrcomServer1.0					119	0.031
http	RemotelyAnywhere remote PC management httpd	6.20.467				111	0.029
telnet	ser2net telnetd		Debian; serial port /dev/ttyS1	Linux		109	0.028
smtp	Postfix smtpd					107	0.028
http	GM Streaming Server httpd				webcam	106	0.027
vnc	VNC		protocol 3.8			104	0.027
ssh	OpenSSH	5.1p1 Debian 5	protocol 2.0	Linux		101	0.026
http	thttpd	2.25b				100	0.026
http	Microsoft IIS httpd	7.0		Windows		98	0.025
http	dcs-lig-httpd					96	0.025
http	lf	0.6				95	0.025
http	D-Link DIR-300 WAP http admin				WAP	95	0.025
ssh			protocol 1.5			94	0.024
http	PDR-M800	1.0				90	0.023
ftp						89	0.023
http	RemotelyAnywhere remote PC management httpd	8.0.605				88	0.023
vdr	VDR	1.7.21			media device	86	0.022
http	thttpd	2.24 26oct2003				85	0.022
http	Microsoft IIS httpd	5.1		Windows		83	0.022
telnet	Frontier Internet *					82	0.021
http	Apache		SSL-only mode			80	0.021
telnet	cisco router pgp-gw3.ccl.ru					79	0.02
rifa-dvr	Rifatron DVR				webcam	78	0.02
http			General User			78	0.02
ssh	Cisco SSH	1.25	protocol 1.99	IOS		77	0.02
telnet	GW1-PWQ1.2day.kz					76	0.02
http	httpd					75	0.019
telnet	This Router					72	0.019
http	Mobotix Camera http config				webcam	68	0.018
vdr	VDR				media device	66	0.017
ftp	ProFTPD	1.3.3rc3		Unix		66	0.017
http	RemotelyAnywhere remote PC management httpd	9.0.856				65	0.017
nbd	Network Block Device					63	0.016
ftp	Serv-U ftpd	6.4		Windows		61	0.016
telnet	Cisco 2514 router telnetd			IOS	router	59	0.015
ssh	Cisco SSH	1.25	protocol 2.0	IOS		59	0.015
ftp	Pure-FTPd					58	0.015
http	RemotelyAnywhere remote PC management httpd	7.10.552				56	0.015
http	Gadspot/Avtech AV787 webcam http config				webcam	56	0.015
ssh	Dropbear sshd	0.51	protocol 2.0	Linux		53	0.014
http	RemotelyAnywhere remote PC management httpd	7.00.531				53	0.014
http	uTorrent WebUI			Windows		52	0.013
telnet	cisco router tusm-gw3.ccl.ru					50	0.013
http	Xitami httpd admin port					50	0.013
http	GoAhead-Webs					50	0.013
http	Mbedthis-Appweb	2.0.4				49	0.013
arcserve	ARCserve Discovery					49	0.013
http-proxy	Squid http proxy					48	0.012
http	Apache	2.0.63	(Win32)			48	0.012
http	DVR Systems webcam http interface				webcam	47	0.012
http	thttpd	2.24				46	0.012
http	Microsoft IIS httpd	5.0		Windows		45	0.012
http	Httpd	1.0				44	0.011
http	Bchat					42	0.011
vnc	RealVNC Enterprise		protocol 4.1			41	0.011
http	GoAhead-Webs httpd		Ovislink WAP http config		WAP	41	0.011
http	CordaServer	7.2.5.3711				41	0.011
ssh	OpenSSH	5.3	protocol 2.0			40	0.01
http	Vivotek 3102 Camera http config				webcam	39	0.01
http	CordaServer	6.0.483				39	0.01
http	Gateway Controller 3560		Gateway Controller 3560			38	0.01
upnp	Portable SDK for UPnP devices	1.3.1	Linux 2.6.21; UPnP 1.0	Linux		37	0.01
http	Vivotek IP7131 Network Camera http config				webcam	37	0.01
ssl	TLS	1.0				36	0.009
http	Monkey httpd	0.9.3		Linux		36	0.009
http	IBM httpd	1.0				36	0.009
http	DD-WRT milli_httpd			Linux	WAP	35	0.009
telnet	the Sirius Star System !					34	0.009
http	Boa HTTPd	0.92o				34	0.009
ssh	Cisco SSH	1.25	protocol 1.5	IOS		33	0.009
http	Apache	2.2.3				33	0.009
telnet	VPN-5 Router					32	0.008
socks5						32	0.008
http	RemotelyAnywhere remote PC management httpd	6.00.449				32	0.008
http	Draytek Vigor ADSL router webadmin				broadband router	31	0.008
http	Virata-EmWeb	6.0.1	Netscreen administrative web server		firewall	30	0.008
http	MultView WEB Server V1.1					30	0.008
http	lighttpd	1.4.13				30	0.008
http	Gateway Controller 3550		Gateway Controller 3550			29	0.008
svnserve	Subversion					28	0.007
ssh	Dropbear sshd	0.48	protocol 2.0	Linux		28	0.007
http	thttpd	2.19-MX Jul 1 2010			WAP	28	0.007
http	CordaServer	6.0.597				28	0.007
telnet	Openwall GNU/*/Linux telnetd			Linux		27	0.007
http	World Client WDaemon httpd	4.0	Alt-N MDaemon webmail	Windows		27	0.007
http	thttpd					27	0.007
http	RemotelyAnywhere remote PC management httpd	10.0.2100				27	0.007
http-proxy	Squid http proxy	2.7.STABLE9				27	0.007
ssh	OpenSSH	5.3p1 Debian 3ubuntu7	Ubuntu Linux; protocol 2.0	Linux		26	0.007
ssh	Dropbear sshd	0.52	protocol 2.0	Linux		26	0.007
http	Foundry EdgeIron switch http config				switch	26	0.007
ssh	OpenSSH	4.7	protocol 2.0			25	0.006
http	build-in http server					25	0.006
http	Airlink 101 or TRENDnet TVIP-422w webcam http config				webcam	25	0.006
shoutcast-publishing	SHOUTcast publishing port					24	0.006
http	thttpd		Panasonic Network Camera http config			24	0.006
http	nginx	0.7.65				24	0.006
http	D-Link/Airlink IP webcam http config	1.0			webcam	24	0.006
http	CordaServer	7.0.1.1366				24	0.006
http	CCcam card sharing system http config					24	0.006
http	Apache		Interface ADMIN			24	0.006
ssh	OpenSSH	5.5p1 Debian 6+squeeze1	protocol 2.0	Linux		23	0.006
http	Boa HTTPd	0.94.14rc18				23	0.006
http	Boa HTTPd	0.93.15				23	0.006
http	Apache	2.2.14	(Ubuntu)			23	0.006
http	Apache	2				23	0.006
ftp	MikroTik router ftpd	5.14			router	23	0.006
ssh	OpenSSH	3.1p1	protocol 1.99			22	0.006
http	thttpd	2.19-MX Oct 19 2011			WAP	22	0.006
ftp	Serv-U ftpd	6.3		Windows		22	0.006
ftp	FileZilla ftpd	0.9.41 beta		Windows		22	0.006
vdr	VDR	1.6.0-2			media device	21	0.005
ssh	OpenSSH	5.5p1 Debian 6+squeeze2	protocol 2.0	Linux		21	0.005
smtp	OpenBSD spamd					21	0.005
http	TRENDnet TV-IP110w or TV-IP422W webcam display httpd				webcam	21	0.005
http	RemotelyAnywhere remote PC management httpd					21	0.005
giop	CORBA naming service					21	0.005
directconnect	Direct Connect P2P			Windows		21	0.005
ssh	OpenSSH	3.9p1	protocol 1.99			20	0.005
rtsp	Avtech MPEG4 DVR control rtspd					20	0.005
openvpn	OpenVPN					20	0.005
http	Zope httpd	2.13.8	python 2.7.2, linux2; ZServer/1.1			20	0.005
http	World Client WDaemon httpd	2.2.3	Alt-N MDaemon webmail	Windows		20	0.005
http	thttpd	2.19-MX Dec 8 2009			WAP	20	0.005
http	Jetty	6.1.x				20	0.005