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	Count	Percent
telnet	Cisco IOS telnetd		114931	29.812
telnet			76928	19.954
telnet	Cisco 1721 router telnetd		57323	14.869
no match	-/-	-/-	54231	14.067
http			14836	3.848
telnet	Cisco router telnetd		13512	3.505
http	lf	0.7	4277	1.109
irc	Dancer ircd		4094	1.062
http	SonicWALL		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
http	Apache		2021	0.524
http	Boa HTTPd	0.94.14rc21	1719	0.446
ssl	SSLv3		1684	0.437
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	Apache	2.0.55	607	0.157
http	lighttpd	1.4.19	597	0.155
http	Netwave IP camera http config		552	0.143
http	Microsoft IIS httpd	6.0	522	0.135
http	Apache	2.2.3	517	0.134
irc-proxy	ShroudBNC irc-proxy	1.1 revision 371	486	0.126
http	lighttpd	1.4.29	451	0.117
ftp	Ipswitch notification ftpd		431	0.112
http	Gateway-Webs		411	0.107
http	RemotelyAnywhere remote PC management httpd	10.0.1086	399	0.103
http	GoAhead-Webs httpd		392	0.102
http	Avtech AVN801 network camera	1.0	360	0.093
http	Apache	2.2.19	341	0.088
ftp	vsftpd	2.0.8 or later	318	0.082
http	WangWnagSimpleServer	1.0	312	0.081
telnet	Linux telnetd		295	0.077
http	GoAhead-Webs embedded httpd		286	0.074
telnet	SMC SMC2870W Wireless Ethernet Bridge		284	0.074
http	Microsoft IIS httpd		254	0.066
ssl	TLSv1		238	0.062
http	RemotelyAnywhere remote PC management httpd	8.0.747	226	0.059
vnc	RealVNC Personal		220	0.057
vnc			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		212	0.055
http	thttpd	2.25b 29dec2003	206	0.053
http	Microsoft HTTPAPI httpd	2.0	206	0.053
http	Apache Tomcat/Coyote JSP engine	1.1	206	0.053
http	Boa HTTPd	0.94.13	202	0.052
http	thttpd		196	0.051
rtsp			194	0.05
http	mini_httpd	1.19 19dec2003	186	0.048
ssh	Cisco SSH	1.25	169	0.044
http	uc-httpd	1.0.0	162	0.042
http	GeoVision GeoHttpServer for webcams		150	0.039
http	webserver	1.0	149	0.039
vnc	VNC		148	0.038
http	Cross Web Server		146	0.038
http	Microsoft IIS httpd	7.5	144	0.037
telnet	corporate network!		141	0.037
ftp	vsftpd (before 2.0.8) or WU-FTPD		139	0.036
remoting	MS .NET Remoting services		132	0.034
http	Hikvision-Webs		132	0.034
irc-proxy	psyBNC	2.3.2-7	130	0.034
telnet	ser2net telnetd		126	0.033
ssh	OpenSSH	4.3	125	0.032
telnet	PE-4 Router		119	0.031
http	DrcomServer1.0		119	0.031
ssh			111	0.029
http	RemotelyAnywhere remote PC management httpd	6.20.467	111	0.029
smtp	Postfix smtpd		107	0.028
http	GM Streaming Server httpd		106	0.027
ssh	OpenSSH	5.1p1 Debian 5	101	0.026
http	thttpd	2.25b	100	0.026
http	Microsoft IIS httpd	7.0	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		95	0.025
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	86	0.022
http	thttpd	2.24 26oct2003	85	0.022
http	Apache	2.2.22	85	0.022
http	Microsoft IIS httpd	5.1	83	0.022
telnet	Frontier Internet *		82	0.021
http	Apache	2.2.16	81	0.021
telnet	cisco router pgp-gw3.ccl.ru		79	0.02
rifa-dvr	Rifatron DVR		78	0.02
http	httpd		77	0.02
telnet	GW1-PWQ1.2day.kz		76	0.02
http	Apache	2.2.14	73	0.019
telnet	This Router		72	0.019
http	Mobotix Camera http config		68	0.018
http	Apache	2.0.63	68	0.018
vdr	VDR		66	0.017
ftp	ProFTPD	1.3.3rc3	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	61	0.016
telnet	Cisco 2514 router telnetd		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		56	0.015
ssh	Dropbear sshd	0.51	53	0.014
http	RemotelyAnywhere remote PC management httpd	7.00.531	53	0.014
http	GoAhead-Webs		53	0.014
http	uTorrent WebUI		52	0.013
telnet	cisco router tusm-gw3.ccl.ru		50	0.013
http	Xitami httpd admin port		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	DVR Systems webcam http interface		47	0.012
http	thttpd	2.24	46	0.012
http	Microsoft IIS httpd	5.0	45	0.012
http	Httpd	1.0	44	0.011
http	Bchat		42	0.011
vnc	RealVNC Enterprise		41	0.011
http	CordaServer	7.2.5.3711	41	0.011
ssh	OpenSSH	5.3	40	0.01
http	Network Camera		40	0.01
http	Vivotek 3102 Camera http config		39	0.01
http	Gateway Controller 3560		39	0.01
http	CordaServer	6.0.483	39	0.01
socks5			38	0.01
http	Apache	2.2.17	38	0.01
http	Apache	2.2.15	38	0.01
upnp	Portable SDK for UPnP devices	1.3.1	37	0.01
http	Vivotek IP7131 Network Camera http config		37	0.01
http	DD-WRT milli_httpd		37	0.01
ssl	TLS	1.0	36	0.009
http	Monkey httpd	0.9.3	36	0.009
http	IBM httpd	1.0	36	0.009
http	Apache	2.2.9	36	0.009
http	Apache	1.3.28	36	0.009
telnet	the Sirius Star System !		34	0.009
http	Wireless Network Camera		34	0.009
http	Virata-EmWeb	6.0.1	34	0.009
http	Boa HTTPd	0.92o	34	0.009
telnet	VPN-5 Router		32	0.008
http	RemotelyAnywhere remote PC management httpd	6.00.449	32	0.008
http	Draytek Vigor ADSL router webadmin		31	0.008
http	WYM httpd	1.0	30	0.008
http	MultView WEB Server V1.1		30	0.008
http	lighttpd	1.4.13	30	0.008
http	Gateway Controller 3550		29	0.008
svnserve	Subversion		28	0.007
ssh	Dropbear sshd	0.48	28	0.007
http	thttpd	2.19-MX Jul 1 2010	28	0.007
http	CordaServer	6.0.597	28	0.007
telnet	Openwall GNU/*/Linux telnetd		27	0.007
ssh	OpenSSH	3.9p1	27	0.007
http	World Client WDaemon httpd	4.0	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
http	Apache	2.0.52	27	0.007
ssh	OpenSSH	5.3p1 Debian 3ubuntu7	26	0.007
ssh	Dropbear sshd	0.52	26	0.007
http	Foundry EdgeIron switch http config		26	0.007
http	Apache	2.2.8	26	0.007
dominoconsole	Lotus Domino Console		26	0.007
ssh	OpenSSH	4.7	25	0.006
http	build-in http server		25	0.006
http	Airlink 101 or TRENDnet TVIP-422w webcam http config		25	0.006
shoutcast-publishing	SHOUTcast publishing port		24	0.006
http	nginx	0.7.65	24	0.006
http	D-Link/Airlink IP webcam http config	1.0	24	0.006
http	CordaServer	7.0.1.1366	24	0.006
http	CCcam card sharing system http config		24	0.006
ssh	OpenSSH	5.5p1 Debian 6+squeeze1	23	0.006
http	Jetty	5.1.2	23	0.006
http	Boa HTTPd	0.94.14rc18	23	0.006
http	Boa HTTPd	0.93.15	23	0.006
http	Apache	2.0.53	23	0.006
http	Apache	2	23	0.006
ftp	MikroTik router ftpd	5.14	23	0.006
ssh	OpenSSH	3.1p1	22	0.006
http	thttpd	2.19-MX Oct 19 2011	22	0.006
http	Apache	2.2.21	22	0.006
http	Apache	1.3.41	22	0.006
ftp	Serv-U ftpd	6.3	22	0.006
ftp	ProFTPD		22	0.006
ftp	FileZilla ftpd	0.9.41 beta	22	0.006
vdr	VDR	1.6.0-2	21	0.005
ssh	OpenSSH	5.5p1 Debian 6+squeeze2	21	0.005
smtp	OpenBSD spamd		21	0.005
http	TRENDnet TV-IP110w or TV-IP422W webcam display httpd		21	0.005
http	RemotelyAnywhere remote PC management httpd		21	0.005
http	Apache	2.2.11	21	0.005
giop	CORBA naming service		21	0.005
directconnect	Direct Connect P2P		21	0.005
rtsp	Avtech MPEG4 DVR control rtspd		20	0.005
openvpn	OpenVPN		20	0.005
http	Zope httpd	2.13.8	20	0.005
http	World Client WDaemon httpd	2.2.3	20	0.005
http	thttpd	2.19-MX Dec 8 2009	20	0.005
http	Jetty	6.1.x	20	0.005
telnet	PE-5 Router		19	0.005
ssh	OpenSSH	5.1	19	0.005
http	MiniServ	0.01	19	0.005
http	Apache	2.0.59	19	0.005
ftp	MikroTik router ftpd	5.4	19	0.005
xml			18	0.005
vnc-http	Ultr@VNC		18	0.005
telnet	the BCC terminal server		18	0.005
nntp	INN nntpd		18	0.005
http	RemotelyAnywhere remote PC management httpd	9.1.1016	18	0.005
http	CordaServer	6.0.706	18	0.005
vdr	VDR	1.4.7	17	0.004
telnet	Mulberry Co-op Telco ***		17	0.004
ssh	OpenSSH	5.4p1	17	0.004
smtp	Exim smtpd	4.77	17	0.004
ovm-manager	Oracle VM Manager		17	0.004
meetingmaker	Meeting Maker calendaring		17	0.004
http	thttpd	2.19-MX Apr 26 2011	17	0.004
http	QNAP TS-219P NAS http config	1.0	17	0.004
http	MikroTik router http config		17	0.004
http	CordaServer	7.0.2.1454	17	0.004
ftp	Microsoft ftpd	5.0	17	0.004
telnet	the EmNet Ltd		16	0.004
telnet	cisco router pgp-gw6.ccl.ru		16	0.004
shoutcast	SHOUTcast server	1.9.5	16	0.004
netbios-ssn			16	0.004
http	Vivotek Network Camera		16	0.004
http	uClinux-httpd	0.2.2	16	0.004
http	RemotelyAnywhere remote PC management httpd	7.01.541	16	0.004
http	MiniServ	1.550	16	0.004
http	lighttpd		16	0.004
http	D-Link DCS-900 webcam http config		16	0.004
http	CordaServer (PopChartServer compatible) 5.1.2h		16	0.004
http	CordaServer	7.1.0.2116	16	0.004
http	CordaServer	6.0.727	16	0.004
http	Apache	1.3.33	16	0.004
telnet	cisco router sovetskaia47b-gw1.ccl.ru		15	0.004
telnet	BSD-derived telnetd		15	0.004
ssh	OpenSSH	5.2	15	0.004
ssh	OpenSSH	4.6	15	0.004
smtp	Microsoft Exchange smtpd		15	0.004
http	WebServer		15	0.004
http-proxy	Haproxy http proxy		15	0.004
http	avtech httpd	1.0	15	0.004