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Port 11999 (wmereporting)

IANA assigns port 11999 to wmereporting: WorldMailExpress.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
wmereporting SCTP WorldMailExpress Greg Foutz -

Registry dates for this port: registered 2006-03.

Check what is listening on port 11999

Linux: is anything listening on TCP 11999?
sudo ss -tlnp 'sport = :11999'
Linux / macOS: which process owns the port
sudo lsof -nP -i :11999
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':11999 '
Windows (Command Prompt)
netstat -ano | findstr :11999
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 11999 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 11999
From Windows
Test-NetConnection HOST -Port 11999

Block port 11999 in the firewall

ufw
sudo ufw deny 11999/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 11999 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 11999 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 11999' -Direction Inbound -Protocol TCP -LocalPort 11999 -Action Block

Related ports

11997wmereceiving11998wmedistribution12000entextxid12001entextnetwk

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