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Port 7913 (qo-secure)

IANA assigns port 7913 to qo-secure: QuickObjects secure port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
qo-secure TCP QuickObjects secure port Jonas Bovin -
qo-secure UDP QuickObjects secure port Jonas Bovin -

Check what is listening on port 7913

Linux: is anything listening on TCP 7913?
sudo ss -tlnp 'sport = :7913'
Linux: UDP 7913
sudo ss -ulnp 'sport = :7913'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7913
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7913 '
Windows (Command Prompt)
netstat -ano | findstr :7913
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7913 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7913
From Windows
Test-NetConnection HOST -Port 7913
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7913

Block port 7913 in the firewall

ufw
sudo ufw deny 7913/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7913 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7913 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7913' -Direction Inbound -Protocol TCP -LocalPort 7913 -Action Block
ufw
sudo ufw deny 7913/udp
iptables
sudo iptables -A INPUT -p udp --dport 7913 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7913 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7913' -Direction Inbound -Protocol UDP -LocalPort 7913 -Action Block

Related ports

7902tnos-dp7903tnos-dps7932t2-drm7933t2-brm

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