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Port 4034 (ubxd)

IANA assigns port 4034 to ubxd: Ubiquinox Daemon.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ubxd TCP Ubiquinox Daemon Kit Smithers -
ubxd UDP Ubiquinox Daemon Kit Smithers -

Check what is listening on port 4034

Linux: is anything listening on TCP 4034?
sudo ss -tlnp 'sport = :4034'
Linux: UDP 4034
sudo ss -ulnp 'sport = :4034'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4034
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4034 '
Windows (Command Prompt)
netstat -ano | findstr :4034
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4034 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4034
From Windows
Test-NetConnection HOST -Port 4034
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4034

Block port 4034 in the firewall

ufw
sudo ufw deny 4034/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4034 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4034 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4034' -Direction Inbound -Protocol TCP -LocalPort 4034 -Action Block
ufw
sudo ufw deny 4034/udp
iptables
sudo iptables -A INPUT -p udp --dport 4034 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4034 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4034' -Direction Inbound -Protocol UDP -LocalPort 4034 -Action Block

Related ports

4032vrts-auth-port4033sanavigator4035wap-push-http4036wap-push-https

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