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Port 5785 (3par-rcopy)

IANA assigns port 5785 to 3par-rcopy: 3PAR Inform Remote Copy.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
3par-rcopy TCP 3PAR Inform Remote Copy Don Marselle -
3par-rcopy UDP 3PAR Inform Remote Copy Don Marselle -

Registry dates for this port: registered 2008-04-09.

Check what is listening on port 5785

Linux: is anything listening on TCP 5785?
sudo ss -tlnp 'sport = :5785'
Linux: UDP 5785
sudo ss -ulnp 'sport = :5785'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5785
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5785 '
Windows (Command Prompt)
netstat -ano | findstr :5785
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5785 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5785
From Windows
Test-NetConnection HOST -Port 5785
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5785

Block port 5785 in the firewall

ufw
sudo ufw deny 5785/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5785 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5785 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5785' -Direction Inbound -Protocol TCP -LocalPort 5785 -Action Block
ufw
sudo ufw deny 5785/udp
iptables
sudo iptables -A INPUT -p udp --dport 5785 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5785 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5785' -Direction Inbound -Protocol UDP -LocalPort 5785 -Action Block

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All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.