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Port 6442 (tarp)

IANA assigns port 6442 to tarp: Transitory Application Request Protocol.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tarp TCP Transitory Application Request Protocol Chris Peel 2 -

Registry dates for this port: registered 2014-05-16.

Check what is listening on port 6442

Linux: is anything listening on TCP 6442?
sudo ss -tlnp 'sport = :6442'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6442
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6442 '
Windows (Command Prompt)
netstat -ano | findstr :6442
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6442 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6442
From Windows
Test-NetConnection HOST -Port 6442

Block port 6442 in the firewall

ufw
sudo ufw deny 6442/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6442 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6442 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6442' -Direction Inbound -Protocol TCP -LocalPort 6442 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.