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Open ports statistics for 2021

 ·  β˜• 3 min read

The year 2021 is behind us which means that the time has come for us to take a look at how the internet changed over its 365 days.

As always, the data, on which the following charts are based, have been gathered using Shodan. Therefore bear in mind that although the charts should give us a good enough view of more significant changes, they may not be completely accurate (see the first post with quarterly statistics.

It should be mentioned that since Shodan started offering a new service called Trends few months back, which enables one to quickly view similar charts as the ones bellow for arbitrary search queries, this may be the last post in the “Open port statistics” series, since these are somewhat superfluous given the new service… Althoug, since Shodan Trends displays only “high-level” charts with significantly lower level of precission (it seems that it uses either an average or a median for each month, whereas the following charts show precise values returned by Shodan on each day in the year), maybe I’ll decide to keep posting these at least on a yearly basis - we’ll see…

Should you be interested in the port situation in the Czech Republic, you may find corresponding charts here.

Bellow, you may find charts for the following protocols and ports:

Web

E-mail

SSL/TLS

Industrial Control Systems (ICS)


SSH (port 22)

SSH

Telnet (port 23)

Telnet

DNS (port 53)

DNS

NTP (port 123)

NTP

SNMP (port 161)

SNMP

SMB (port 445)

SMB

RDP (port 3389)

RDP

Web

HTTP (port 80)

HTTP

HTTPS (port 443)

HTTPS

TLS 1.3 (port 443)

HTTPS/TLS 1.3

TLS 1.2 (port 443)

HTTPS/TLS 1.2

TLS 1.1 (port 443)

HTTPS/TLS 1.1

TLS 1.0 (port 443)

HTTPS/TLS 1.0

SSL 3.0 (port 443)

HTTPS/SSL 3.0

SSL 2.0 (port 443)

HTTPS/SSL 2.0

E-mail

SMTP (port 25)

SMTP

SMTPS (port 465)

SMTPS

IMAP (port 143)

IMAP

IMAPS (port 993)

IMAPS

POP3 (port 110)

POP3

POP3S (port 995)

POP3S

SSL/TLS

TLS 1.3 (all ports)

HTTPS/TLS 1.3

TLS 1.2 (all ports)

HTTPS/TLS 1.2

TLS 1.1 (all ports)

HTTPS/TLS 1.1

TLS 1.0 (all ports)

HTTPS/TLS 1.0

SSL 3.0 (all ports)

HTTPS/SSL 3.0

SSL 2.0 (all ports)

HTTPS/SSL 2.0

Industrial Control Systems

All ICS protocols

All ICS protocols

Modbus (port 502)

Modbus

EIBnet/IP (port 3671)

EIBnet

BACnet/IP (port 47808)

BACnet