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Port 4085 (ezmessagesrv)

IANA assigns port 4085 to ezmessagesrv: EZNews Newsroom Message Service.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ezmessagesrv TCP EZNews Newsroom Message Service Gerald R Jensen -

Registry dates for this port: registered 2008-06-05.

Check what is listening on port 4085

Linux: is anything listening on TCP 4085?
sudo ss -tlnp 'sport = :4085'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4085
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4085 '
Windows (Command Prompt)
netstat -ano | findstr :4085
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4085 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4085
From Windows
Test-NetConnection HOST -Port 4085

Block port 4085 in the firewall

ufw
sudo ufw deny 4085/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4085 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4085 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4085' -Direction Inbound -Protocol TCP -LocalPort 4085 -Action Block

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