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Port 4359 (omabcastltkm)

IANA assigns port 4359 to omabcastltkm: OMA BCAST Long-Term Key Messages.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
omabcastltkm TCP OMA BCAST Long-Term Key Messages Frank Hartung -
omabcastltkm UDP OMA BCAST Long-Term Key Messages Frank Hartung -

Registry dates for this port: registered 2007-09-07.

Check what is listening on port 4359

Linux: is anything listening on TCP 4359?
sudo ss -tlnp 'sport = :4359'
Linux: UDP 4359
sudo ss -ulnp 'sport = :4359'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4359
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4359 '
Windows (Command Prompt)
netstat -ano | findstr :4359
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4359 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4359
From Windows
Test-NetConnection HOST -Port 4359
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4359

Block port 4359 in the firewall

ufw
sudo ufw deny 4359/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4359 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4359 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4359' -Direction Inbound -Protocol TCP -LocalPort 4359 -Action Block
ufw
sudo ufw deny 4359/udp
iptables
sudo iptables -A INPUT -p udp --dport 4359 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4359 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4359' -Direction Inbound -Protocol UDP -LocalPort 4359 -Action Block

Related ports

4357qsnet-cond4358qsnet-nucl4360matrix-vnet, matrix_vnet4361nacnl

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