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Port 49000 (matahari)

IANA assigns port 49000 to matahari: Matahari Broker.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
matahari TCP Matahari Broker Matahari Project -

Registry dates for this port: registered 2011-08-31.

Check what is listening on port 49000

Linux: is anything listening on TCP 49000?
sudo ss -tlnp 'sport = :49000'
Linux / macOS: which process owns the port
sudo lsof -nP -i :49000
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':49000 '
Windows (Command Prompt)
netstat -ano | findstr :49000
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 49000 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 49000
From Windows
Test-NetConnection HOST -Port 49000

Block port 49000 in the firewall

ufw
sudo ufw deny 49000/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 49000 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 49000 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 49000' -Direction Inbound -Protocol TCP -LocalPort 49000 -Action Block

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