Overview of services running on Port 311 TCP.
~59 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
sslSSLv33559160.235
http924815.651
httpSonicWALL36896.243
chatAIM or ICQ server21723.676
httpa_6311591.962
httpApache1.3.2710421.764
no match-/--/-10111.711
httpApache2.2.87241.225
httpAIM1.06091.031
httplighttpd1.4.194620.782
httplighttpd1.4.294190.709
httpApache1.3.261610.272
httpMicrosoft IIS httpd6.01460.247
httpGoAhead-Webs httpd1130.191
ssh1000.169
httpMicrosoft HTTPAPI httpd2.0930.157
httpApache Tomcat/Coyote JSP engine1.1920.156
httpNetwave IP camera http config880.149
httpAvtech AVN801 network camera1.0690.117
httpthttpd2.24660.112
httpMicrosoft IIS httpd620.105
directconnectDirect Connect P2P620.105
httpApache610.103
httpMiniServ1.580540.091
vncVNC510.086
telnet510.086
httpPDR-M8001.0430.073
httpApache2.2.3390.066
httpApache2.2.14340.058
httpBoa HTTPd0.94.14rc21330.056
arcserveARCserve Discovery320.054
httpmini_httpd1.19 19dec2003310.052
http-proxySquid http proxy2.6.STABLE12300.051
httpApache2.2.16270.046
http-proxySquid http proxy2.7.STABLE9240.041
httpHikvision-Webs240.041
sshOpenSSH4.3210.036
ftpMicrosoft ftpd210.036
httpthttpd200.034
httpMbedthis-Appweb2.0.4190.032
httpApache2.2.22190.032
ftp190.032
httpGoAhead-Webs180.03
httpApple Server Monitor http interface180.03
httpuc-httpd1.0.0170.029
httpthttpd2.24 26oct2003170.029
httpApache2.0.53170.029
ftpvsftpd2.0.8 or later170.029
httpthttpd2.25b160.027
httplighttpd1.4.20160.027
httpGadspot/Avtech AV787 webcam http config160.027
httpApache2.2.21160.027