Overview of services running on Port 8881 TCP.
~33 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
http		8670	25.792
irc	Dancer ircd	3978	11.834
http	SonicWALL	3693	10.986
chat	AIM or ICQ server	2074	6.17
http	Microsoft IIS httpd	1768	5.26
no match	-/-	1564	4.653
http	lighttpd	1514	4.504
http	Apache	1292	3.844
http	AIM	720	2.142
ssl	TLS	484	1.44
http	Apache Tomcat/Coyote JSP engine	438	1.303
http	Allegro RomPager	296	0.881
http	IBM WebSphere Application Server	268	0.797
http	Ipswitch IMail Monitor web service	258	0.768
http	Boa HTTPd	250	0.744
http	sw-cp-server httpd	236	0.702
http	Netwave webcam http config	235	0.699
http	nginx	226	0.672
ftp	ProFTPD	203	0.604
http	thttpd	199	0.592
ssh	OpenSSH	183	0.544
http-proxy	Squid http proxy	180	0.535
http	Netwave IP camera http config	165	0.491
http	udpxy multicast UDP-to-HTTP	143	0.425
http	GoAhead-Webs httpd	138	0.411
http	Indy	135	0.402
http	DrcomServer1.0	129	0.384
http	mini_httpd	123	0.366
http	OpenDNS Guide	121	0.36
http	Hikvision-Webs	115	0.342
http	uTorrent utserver web interface	110	0.327
http	MikroTik router config httpd	101	0.3
http	GoAhead-Webs	100	0.297
http	Jetty	98	0.292
ssh		95	0.283
http	Rex media encoder http config	81	0.241
ssh	MikroTik RouterOS sshd	78	0.232
http	Avtech AVN801 network camera	77	0.229
http	NAI EPO Agent framework	74	0.22
vnc	VNC	69	0.205
http	Network Associates ePolicy Orchestrator	69	0.205
http	Linux	68	0.202
telnet		54	0.161
http	PDR-M800	54	0.161
http	uc-httpd	53	0.158
http	ADAM-6000	50	0.149
http	webserver	48	0.143
http	uTorrent WebUI	47	0.14
http	BaseHTTPServer	47	0.14
http	GoAhead-Webs embedded httpd	45	0.134
ftp	Microsoft ftpd	45	0.134
http	Microsoft HTTPAPI httpd	44	0.131
http	Mbedthis-Appweb	43	0.128
http	WYM httpd	39	0.116
http	GeoVision GeoHttpServer for webcams	36	0.107
http	Cisco IOS http config	32	0.095
http	TwistedWeb httpd	29	0.086
http	Dungeon8	28	0.083
http	Router	27	0.08
upnp	Portable SDK for UPnP devices	26	0.077
http	Cross Web Server	26	0.077
http	RemotelyAnywhere remote PC management httpd	25	0.074
http	Draytek Vigor ADSL router webadmin	25	0.074
http	CherryPy httpd	25	0.074
http	Gadspot/Avtech AV787 webcam http config	24	0.071
shoutcast-publishing	SHOUTcast publishing port	23	0.068
mysql	MySQL	22	0.065
http	HTTPD 1.0	22	0.065
ice	Internet Communications Engine	21	0.062
http	Tornado httpd	21	0.062
http	ESET NOD32 anti-virus update httpd	21	0.062
http	D-Link DIR-300 WAP http admin	21	0.062
http	DVR Systems webcam http interface	20	0.059
ftp		20	0.059
http	Caucho Resin JSP engine	19	0.057
smtp	Microsoft ESMTP	18	0.054
http	TornadoServer	18	0.054
http-proxy	MikroTik http proxy	18	0.054
http	Microsoft-HTTPAPI	18	0.054
http	Httpd	18	0.054
http	httpd	18	0.054
http	dcs-lig-httpd	18	0.054
http	WebLogic httpd	17	0.051
http	Intoto httpd	17	0.051
http	NetBox httpd	16	0.048
ftp	vsftpd (before 2.0.8) or WU-FTPD	16	0.048
vnc	RealVNC Enterprise	15	0.045
http	Yawcam webcam viewer httpd	15	0.045
http	TP-LINK Router	15	0.045
http	MiniServ	15	0.045
http	MikroTik router http config	15	0.045
eggdrop	Eggdrop IRC bot console	15	0.045
directconnect	Direct Connect P2P	15	0.045
soap	gSOAP soap	14	0.042
http-proxy	F5 BIG-IP load balancer http proxy	14	0.042
http	Grandstream HT502 VoIP router http config	14	0.042
http	Ecam	14	0.042
http	WebServer	13	0.039
http	Virata-EmWeb	13	0.039
http	QNAP TS-219P NAS http config	13	0.039
http	DD-WRT milli_httpd	13	0.039
http	AIM HTTP	13	0.039
ftp	Serv-U ftpd	13	0.039
vnc	RealVNC Personal	12	0.036
ssh	Cisco SSH	12	0.036
http	Network Camera	12	0.036
ssh	Dropbear sshd	11	0.033
remoting	MS .NET Remoting services	11	0.033
http	Zope httpd	11	0.033
http	Linksys router http config	11	0.033
java-rmi	Java RMI	10	0.03
http	WSGIServer	10	0.03
http	Transmission BitTorrent management httpd	10	0.03
http	Sun GlassFish	10	0.03
http-proxy	EZproxy web proxy	10	0.03
http	iChat(www.ichat.net.cn)	10	0.03
ftp	vsftpd	10	0.03
ftp	FileZilla ftpd	10	0.03