Port 21010Notezilla LAN Server

TCP port 21010 is used by Notezilla's LAN Server for sharing or syncing notes between Notezilla installations on a local network.

inNetwork Services

transport: tcp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as Notezilla Server

Technical Details

what runs on :21010

The assignment identifies a Notezilla LAN Server endpoint over TCP on port 21010. It is a proprietary application service for Notezilla clients on a local network, not a standardized protocol; public documentation does not establish its handshake, framing, or whether the application can use a different configured port. Do not assume TLS or any other encryption from the port number.

Security Information

exposure of :21010

risk score

2/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

network services averages 2.6 across 1,934 ports — this one sits 0.6 below.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

Keep this service reachable only by the Notezilla clients and users that need it, typically using a LAN firewall rule; it is not intended as a public internet service. A reachable server could expose or affect users' notes, but public information does not establish its authentication, encryption, or a specific vulnerability, so assess those controls in the installed version.

Record

iana registry entry

port: :21010
service: Notezilla LAN Server
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services
usage: This is the registered endpoint for Conceptworld's Notezilla LAN Server, used with the Notezilla sticky-notes application. It is encountered on a network where that server component is installed and configured, rather than as a general-purpose network service.
lookups: 0rank 993
added: 2026-10-18
updated: 2026-10-18
references: IANA service name registry — port 21010

Something wrong?

This record is maintained by the engineers who use port 21010. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-18.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :21010Notezilla LAN Server

Technical Details

Security Information

Related Ports

Port 21010Notezilla LAN Server