Overview of services running on Port 50021 TCP.
~6 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
chatAIM or ICQ server171126.25
no match-/--/-164925.299
httplighttpd1.4.193595.508
http3315.078
ftp2443.743
httpMicrosoft IIS httpd1342.056
ftpDrayTek Vigor 2820 ADSL router ftpd1.01251.918
ftpMicrosoft ftpd1181.81
httpMicrosoft HTTPAPI httpd2.01131.734
ssh811.243
mongodbMongoDB23781.197
ftpPure-FTPd610.936
vncVNC550.844
ftpvsftpd2.0.5550.844
telnet480.736
ftpMikroTik router ftpd3.30440.675
httpthttpd430.66
ftpFileZilla ftpd0.9.41 beta430.66
ftpvsftpd2.2.2390.598
ftpProFTPD1.3.3350.537
httpWangWnagSimpleServer1.0320.491
ftpvsftpd2.0.7280.43
ftpMikroTik router ftpd5.6270.414
ftpFileZilla ftpd0.9.37 beta260.399
ftpServ-U ftpd6.4250.384
ftpDreambox ftpd240.368
httpBoa HTTPd0.94.14rc21220.338
ftpSynology DiskStation NAS ftpd200.307
ftpProFTPD1.3.3a200.307
ftpFileZilla ftpd0.9.40 beta200.307
ftpvsftpd2.3.2180.276
ftpoftpd180.276
sshOpenSSH4.3150.23
ftpProFTPD1.3.1150.23