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Port 7902 (tnos-dp)

IANA assigns port 7902 to tnos-dp: TNOS shell Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tnos-dp TCP TNOS shell Protocol Rene Kurt -
tnos-dp UDP TNOS shell Protocol Rene Kurt -

Registry dates for this port: registered 2005-08.

Check what is listening on port 7902

Linux: is anything listening on TCP 7902?
sudo ss -tlnp 'sport = :7902'
Linux: UDP 7902
sudo ss -ulnp 'sport = :7902'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7902
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7902 '
Windows (Command Prompt)
netstat -ano | findstr :7902
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7902 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7902
From Windows
Test-NetConnection HOST -Port 7902
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7902

Block port 7902 in the firewall

ufw
sudo ufw deny 7902/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7902 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7902 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7902' -Direction Inbound -Protocol TCP -LocalPort 7902 -Action Block
ufw
sudo ufw deny 7902/udp
iptables
sudo iptables -A INPUT -p udp --dport 7902 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7902 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7902' -Direction Inbound -Protocol UDP -LocalPort 7902 -Action Block

Related ports

7900mevent7901tnos-sp7903tnos-dps7913qo-secure

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