HTTPfy

Port 6389 (clariion-evr01)

IANA assigns port 6389 to clariion-evr01.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
clariion-evr01 TCP clariion-evr01 Dave DesRoches -
clariion-evr01 UDP clariion-evr01 Dave DesRoches -

Check what is listening on port 6389

Linux: is anything listening on TCP 6389?
sudo ss -tlnp 'sport = :6389'
Linux: UDP 6389
sudo ss -ulnp 'sport = :6389'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6389
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6389 '
Windows (Command Prompt)
netstat -ano | findstr :6389
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6389 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6389
From Windows
Test-NetConnection HOST -Port 6389
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6389

Block port 6389 in the firewall

ufw
sudo ufw deny 6389/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6389 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6389 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6389' -Direction Inbound -Protocol TCP -LocalPort 6389 -Action Block
ufw
sudo ufw deny 6389/udp
iptables
sudo iptables -A INPUT -p udp --dport 6389 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6389 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6389' -Direction Inbound -Protocol UDP -LocalPort 6389 -Action Block

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