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Port 10543 (MOS-soap)

IANA assigns port 10543 to MOS-soap: MOS SOAP Default Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
MOS-soap TCP MOS SOAP Default Port Eric Thorniley -
MOS-soap UDP MOS SOAP Default Port Eric Thorniley -

Registry dates for this port: registered 2007-09-17.

Check what is listening on port 10543

Linux: is anything listening on TCP 10543?
sudo ss -tlnp 'sport = :10543'
Linux: UDP 10543
sudo ss -ulnp 'sport = :10543'
Linux / macOS: which process owns the port
sudo lsof -nP -i :10543
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':10543 '
Windows (Command Prompt)
netstat -ano | findstr :10543
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 10543 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 10543
From Windows
Test-NetConnection HOST -Port 10543
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 10543

Block port 10543 in the firewall

ufw
sudo ufw deny 10543/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 10543 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 10543 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 10543' -Direction Inbound -Protocol TCP -LocalPort 10543 -Action Block
ufw
sudo ufw deny 10543/udp
iptables
sudo iptables -A INPUT -p udp --dport 10543 -j DROP
nftables
sudo nft add rule inet filter input udp dport 10543 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 10543' -Direction Inbound -Protocol UDP -LocalPort 10543 -Action Block

Related ports

10541MOS-upper10542MOS-aux10544MOS-soap-opt10548serverdocs

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