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Port 11111 (vce)

IANA assigns port 11111 to vce: Viral Computing Environment (VCE).

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vce TCP Viral Computing Environment (VCE) Fred Cohen -
vce UDP Viral Computing Environment (VCE) Fred Cohen -

Check what is listening on port 11111

Linux: is anything listening on TCP 11111?
sudo ss -tlnp 'sport = :11111'
Linux: UDP 11111
sudo ss -ulnp 'sport = :11111'
Linux / macOS: which process owns the port
sudo lsof -nP -i :11111
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':11111 '
Windows (Command Prompt)
netstat -ano | findstr :11111
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 11111 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 11111
From Windows
Test-NetConnection HOST -Port 11111
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 11111

Block port 11111 in the firewall

ufw
sudo ufw deny 11111/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 11111 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 11111 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 11111' -Direction Inbound -Protocol TCP -LocalPort 11111 -Action Block
ufw
sudo ufw deny 11111/udp
iptables
sudo iptables -A INPUT -p udp --dport 11111 -j DROP
nftables
sudo nft add rule inet filter input udp dport 11111 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 11111' -Direction Inbound -Protocol UDP -LocalPort 11111 -Action Block

Related ports

11109sgi-dmfmgr11110sgi-soap11112dicom11161suncacao-snmp

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