Overview of services running on Port 4001 TCP.
~294 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
telnet	Cisco router telnetd	134782	45.756
no match	-/-	107633	36.54
http		12429	4.219
ftp	vsftpd	7397	2.511
telnet	Cisco telnetd	4965	1.686
irc	Dancer ircd	4045	1.373
http	SonicWALL	3361	1.141
chat	AIM or ICQ server	2301	0.781
eggdrop	Eggdrop IRC bot console	2198	0.746
ssl	SSLv3	1742	0.591
http	lighttpd	1675	0.569
donkey	MLDonkey multi-network P2P server	786	0.267
http	Apache	778	0.264
upnp	Portable SDK for UPnP devices	716	0.243
mysql	MySQL	700	0.238
http	Microsoft IIS httpd	660	0.224
http	AIM	562	0.191
http	SNF	423	0.144
http	Microsoft HTTPAPI httpd	384	0.13
ssh	OpenSSH	365	0.124
http	thttpd	344	0.117
irc-proxy	psyBNC	314	0.107
http	Boa HTTPd	249	0.085
http	Netwave IP camera http config	242	0.082
telnet		208	0.071
http	Apache Tomcat/Coyote JSP engine	169	0.057
http	GoAhead-Webs httpd	153	0.052
http	OracleAS Web Cache 10g	143	0.049
vnc	VNC	139	0.047
http	wg_httpd	135	0.046
http-proxy	Squid http proxy	126	0.043
ssh		122	0.041
http	WangWnagSimpleServer	113	0.038
http	Mongrel httpd	112	0.038
ftp	Microsoft ftpd	108	0.037
remoting	MS .NET Remoting services	106	0.036
http	nginx	99	0.034
http	TBS	96	0.033
http	Thin	94	0.032
http	Avtech AVN801 network camera	93	0.032
rtsp		81	0.027
oracle-tns	Oracle TNS Listener	80	0.027
http	Z-World Rabbit	69	0.023
ice	Internet Communications Engine	67	0.023
http-proxy	EZproxy web proxy	64	0.022
http	Indy	62	0.021
http	Ubuntu	59	0.02
http	Secure Computing Sidewinder firewall http admin	59	0.02
http	PDR-M800	59	0.02
http	mini_httpd	58	0.02
secure-socket	CA Secure Socket Adapter	52	0.018
arcserve	ARCserve Discovery	52	0.018
ssl	TLSv1	51	0.017
http	Hikvision-Webs	50	0.017
http	Jetty	48	0.016
ftp	Serv-U ftpd	46	0.016
ftp	FileZilla ftpd	39	0.013
vnc		36	0.012
http	Cisco IOS http config	36	0.012
ftp	ProFTPD	36	0.012
http	uc-httpd	34	0.012
http	ImagiaTek	33	0.011
ftp		33	0.011
http	uTorrent WebUI	31	0.011
http	GeoVision GeoHttpServer for webcams	31	0.011
http	RemotelyAnywhere remote PC management httpd	29	0.01
http	Net-OS 5.xx UPnP	29	0.01
http	MiniServ	29	0.01
http	Mbedthis-Appweb	29	0.01
citrix-ica	Citrix Metaframe XP ICA	28	0.01
http	Cross Web Server	27	0.009
ssh	Dropbear sshd	26	0.009
http	WEBrick httpd	26	0.009
http	GoAhead-Webs	26	0.009
http	Gadspot/Avtech AV787 webcam http config	26	0.009
http	WebFS httpd	25	0.008
vnc-http	Ultr@VNC	24	0.008
ssl	TLS	24	0.008
ericom	Ericom PowerTermWebConnect	24	0.008
bnetd	bnetd open source Blizzard Battlenet server	23	0.008
http	Httpd	22	0.007
http	DVR Systems webcam http interface	22	0.007
upnp	Microsoft Windows UPnP	21	0.007
http	MS .NET Remoting httpd	21	0.007
vnc	RealVNC Personal	20	0.007
ssl	Microsoft IIS SSL	20	0.007
irc	Unreal ircd	19	0.006
http	WebLogic httpd	19	0.006
dominoconsole	Lotus Domino Console	19	0.006
directconnect	Direct Connect P2P	19	0.006
openvpn	OpenVPN	18	0.006
http	thin 1.2.11 codename Bat-Shit Crazy	18	0.006
http	SimpleSever	18	0.006
ftp	Pure-FTPd	18	0.006
shoutcast-publishing	SHOUTcast publishing port	17	0.006
http	GoAhead-Webs embedded httpd	17	0.006
http	D-Link DIR-300 WAP http admin	17	0.006
http	CCcam card sharing system http config	17	0.006
soap	gSOAP soap	16	0.005
smtp	Microsoft ESMTP	16	0.005
http	Dispatcher Server V3	16	0.005
http	Allegro RomPager	16	0.005
http	httpd	15	0.005
vnc	RealVNC Enterprise	14	0.005
http-proxy	F5 BIG-IP load balancer http proxy	14	0.005
http	JDav server 1.0	14	0.005
http	D-Link/Airlink IP webcam http config	14	0.005
socks-proxy	Socks4A	13	0.004
netbios-ssn		13	0.004
http	WYM httpd	13	0.004
http	World Client WDaemon httpd	13	0.004
http	TRENDnet TV-IP110w or TV-IP422W webcam display httpd	13	0.004
http-proxy	3proxy http proxy	13	0.004
http	dcs-lig-httpd	13	0.004
xml		12	0.004
socks5		12	0.004
smtp	Microsoft Exchange smtpd	11	0.004
http	QNAP TS-219P NAS http config	11	0.004
http	GM Streaming Server httpd	11	0.004
http	emBetter	11	0.004
http	AIM HTTP	11	0.004
eggdrop	Eggdrop irc bot console	11	0.004
smtp	Postfix smtpd	10	0.003
http	CherryPy httpd	10	0.003
http	Boa httpd	10	0.003