Overview of services running on Port 993 TCP.
~4.8 Million 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
ssl	SSLv3		4189034	87.319
ssl	TLSv1		538845	11.232
ssl/imap	Cyrus imapd		16126	0.336
psql	Pervasive.SQL Server - Relational Engine		11415	0.238
ssl	Microsoft IIS SSL		11226	0.234
no match	-/-	-/-	6970	0.145
ssl	TLS	1.0	3664	0.076
http	SonicWALL		3389	0.071
http			2981	0.062
chat	AIM or ICQ server		2573	0.054
imap	Microsoft Exchange imapd		2150	0.045
http	lighttpd	1.4.19	578	0.012
imap	MailEnable imapd		557	0.012
http	AIM	1.0	338	0.007
imap	Dovecot imapd		294	0.006
imap			293	0.006
http	Microsoft IIS httpd		265	0.006
imap	Courier Imapd		256	0.005
http	lighttpd	1.4.29	251	0.005
http	Microsoft HTTPAPI httpd	2.0	182	0.004
http	thttpd	2.24	168	0.004
smtp	Microsoft Exchange smtpd		167	0.003
http	GoAhead-Webs httpd		167	0.003
openvpn	OpenVPN		157	0.003
imap	SmarterMail imapd		153	0.003
imap	hMailServer imapd		146	0.003
ssl	SSLv2		137	0.003
http	DrcomServer1.0		117	0.002
tcpwrapped	BSD TCP Wrappers		111	0.002
http	Apache Tomcat/Coyote JSP engine	1.1	109	0.002
ssh			105	0.002
smtp			103	0.002
http	Secure Computing Sidewinder firewall http admin		91	0.002
vnc	VNC		90	0.002
http	Netwave IP camera http config		79	0.002
ssh	OpenSSH	4.3	77	0.002
http	Boa HTTPd	0.94.14rc21	75	0.002
http	Apache	2.2.14	72	0.002
http	CCProxy		71	0.001
http	Avtech AVN801 network camera	1.0	71	0.001
ssl	multi-vendor SSL		70	0.001
arcserve	ARCserve Discovery		70	0.001
http	Hikvision-Webs		67	0.001
smtp	Postfix smtpd		58	0.001
telnet			57	0.001
http	thttpd	2.25b	57	0.001
ssh	OpenSSH	5.5p1 Debian 6+squeeze2	56	0.001
http	PDR-M800	1.0	56	0.001
ssh	OpenSSH	5.3p1 Debian 3ubuntu7	54	0.001
pop3	MailEnable POP3 Server		53	0.001
imap	Microsoft Exchange 2007-2010 imapd		53	0.001
http	Microsoft IIS httpd	6.0	50	0.001
imap	Binc imapd		48	0.001
ssh	Dropbear sshd	0.52	45	0.001
http	Apache	2.2.22	45	0.001
imap-proxy	nginx imap proxy		43	0.001
http-proxy	Squid http proxy	2.6.STABLE12	43	0.001
http	mini_httpd	1.19 19dec2003	39	0.001
ssh	OpenSSH	5.1p1 Debian 5	38	0.001
http	Apache	2.2.3	38	0.001
http	Apache		35	0.001
imap	Axigen imapd	8.1.0	31	0.001
http	thttpd		31	0.001
ftp	Microsoft ftpd		29	0.001
ssh	OpenSSH	5.9p1 Debian 5ubuntu1	28	0.001
ftp	vsftpd	2.0.8 or later	28	0.001
ssh	OpenSSH	5.8	27	0.001
http	Apache	2.2.16	27	0.001
smtp	Microsoft ESMTP	6.0.3790.4675	26	0.001
ssh	OpenSSH	5.4p1	25	0.001
ssh	OpenSSH	5.3	25	0.001
imap	Microsoft Exchange Server 2003 imapd	6.5.7638.1	25	0.001
ssh	OpenSSH	5.2	24	0.001
socks-proxy	CCProxy socks proxy		24	0.001
ftp			24	0.001
ssh	OpenSSH	5.8p2_hpn13v11	23	0.0
http-proxy	Squid http proxy	2.7.STABLE9	23	0.0
ftp	WS FTPd	5.0.5	22	0.0
http	uTorrent WebUI		21	0.0
http	Gadspot/Avtech AV787 webcam http config		21	0.0
ssh	OpenSSH	5.5p1 Debian 6	20	0.0
ssh	OpenSSH	3.9p1	20	0.0
pop3	Dovecot pop3d		19	0.0
http	uc-httpd	1.0.0	19	0.0
http	Boa HTTPd	0.94.13	19	0.0
http	Apache	2.2.15	19	0.0
xml			18	0.0
vnc	RealVNC Enterprise		18	0.0
ssh	OpenSSH	5.8p1 Debian 7ubuntu1	18	0.0
msdtc	Microsoft Distributed Transaction Coordinator		18	0.0
http	http server 1.0		18	0.0
http	Apache	2.2.9	18	0.0
ssh	OpenSSH	5.9	17	0.0
ssh	OpenSSH	4.5p1	17	0.0
http-proxy	Squid http proxy	3.1.6	17	0.0
vnc	RealVNC Personal		15	0.0
ssh	OpenSSH	6.0	15	0.0
ssh	OpenSSH	5.4p1_hpn13v11	15	0.0
http	Mbedthis-Appweb	2.0.4	15	0.0
http	Cross Web Server		15	0.0
ftp	Pure-FTPd		15	0.0