Port 8445Copy peer synchronization

TCP/8445 is used by Copy for peer synchronization.

transport: tcp
in transit: encrypted
assignment: official
risk: 1/10
lookups: 0

Technical Details

what runs on :8445

Copy peer synchronization is registered on port :8445 over tcp to Copy, assigned September 2012. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :8445

this machine

# linux
sudo ss -tlpn 'sport = :8445'

# macos / bsd
sudo lsof -nP -i :8445

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :8445

another host

nmap -sV -p T:8445 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :8445

risk score

1/ 10safe

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

file transfer averages 3.4 across 176 ports — this one sits 2.4 below.

in transit

encrypted

payloads are protected on the wire

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

no security notes recorded for :8445 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :8445
service: Copy peer synchronization
transport: TCP
encryption: tls / encrypted
assignment: iana registered
risk: 1/10safe
category: File Transfer
usage: The IANA assignment identifies TCP port 8445 as Copy's peer synchronization feature. It is a vendor-specific service that engineers are most likely to encounter on systems running Copy software.
lookups: 0rank 993
added: 2026-09-14
updated: 2026-09-14
references: IANA service name registry — port 8445

Something wrong?

This record is maintained by the engineers who use port 8445. 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 2026-09-14.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

all 176 in file transfer →

the 8 most looked-up other ports in file transfer — 176 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:17500	Dropbox LAN Sync	TCPUDP	File Transfer	caution	43.7k
:548	Apple Filing Protocol	TCP	File Transfer	caution	36.8k
:7000	Vuze HTTPS Tracker	TCPtls	Security	caution	28.9k
:1337	PowerFolder P2P	TCP	Security	caution	27.1k
:9001	SharePoint Authoring		Web Services	caution	26.3k
:8080	FilePhile Relay	UDP	File Transfer	caution	25.6k
:1337	WASTE Encrypted Sharing	TCP	Security	caution	22.9k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :8445Copy peer synchronization

Technical Details

Security Information

Related Ports

Port 8445Copy peer synchronization