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Port 29167 (otmp)

IANA assigns port 29167 to otmp: ObTools Message Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
otmp TCP ObTools Message Protocol Paul Clark -
otmp UDP ObTools Message Protocol Paul Clark -

Registry dates for this port: registered 2006-02.

Check what is listening on port 29167

Linux: is anything listening on TCP 29167?
sudo ss -tlnp 'sport = :29167'
Linux: UDP 29167
sudo ss -ulnp 'sport = :29167'
Linux / macOS: which process owns the port
sudo lsof -nP -i :29167
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':29167 '
Windows (Command Prompt)
netstat -ano | findstr :29167
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 29167 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 29167
From Windows
Test-NetConnection HOST -Port 29167
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 29167

Block port 29167 in the firewall

ufw
sudo ufw deny 29167/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 29167 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 29167 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 29167' -Direction Inbound -Protocol TCP -LocalPort 29167 -Action Block
ufw
sudo ufw deny 29167/udp
iptables
sudo iptables -A INPUT -p udp --dport 29167 -j DROP
nftables
sudo nft add rule inet filter input udp dport 29167 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 29167' -Direction Inbound -Protocol UDP -LocalPort 29167 -Action Block

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