HTTPfy

Port 3110 (sim-control)

IANA assigns port 3110 to sim-control: simulator control port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sim-control TCP simulator control port Ian Bell -
sim-control UDP simulator control port Ian Bell -

Check what is listening on port 3110

Linux: is anything listening on TCP 3110?
sudo ss -tlnp 'sport = :3110'
Linux: UDP 3110
sudo ss -ulnp 'sport = :3110'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3110
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3110 '
Windows (Command Prompt)
netstat -ano | findstr :3110
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3110 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3110
From Windows
Test-NetConnection HOST -Port 3110
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3110

Block port 3110 in the firewall

ufw
sudo ufw deny 3110/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3110 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3110 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3110' -Direction Inbound -Protocol TCP -LocalPort 3110 -Action Block
ufw
sudo ufw deny 3110/udp
iptables
sudo iptables -A INPUT -p udp --dport 3110 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3110 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3110' -Direction Inbound -Protocol UDP -LocalPort 3110 -Action Block

Related ports

3108geolocate3109personnel3111wsynch3112ksysguard

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