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Port 4485 (assyst-dr)

IANA assigns port 4485 to assyst-dr: Assyst Data Repository Service.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
assyst-dr TCP Assyst Data Repository Service Albert Cester -

Registry dates for this port: registered 2008-08-26.

Check what is listening on port 4485

Linux: is anything listening on TCP 4485?
sudo ss -tlnp 'sport = :4485'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4485
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4485 '
Windows (Command Prompt)
netstat -ano | findstr :4485
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4485 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4485
From Windows
Test-NetConnection HOST -Port 4485

Block port 4485 in the firewall

ufw
sudo ufw deny 4485/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4485 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4485 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4485' -Direction Inbound -Protocol TCP -LocalPort 4485 -Action Block

Related ports

4480agtp, agtp-quic4484hpssmgmt4486icms4487prex-tcp

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