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Port 3783 (bim-pem)

IANA assigns port 3783 to bim-pem: Impact Mgr./PEM Gateway.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
bim-pem TCP Impact Mgr./PEM Gateway Walter G Giroir -
bim-pem UDP Impact Mgr./PEM Gateway Walter G Giroir -

Registry dates for this port: registered 2003-07.

Check what is listening on port 3783

Linux: is anything listening on TCP 3783?
sudo ss -tlnp 'sport = :3783'
Linux: UDP 3783
sudo ss -ulnp 'sport = :3783'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3783
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3783 '
Windows (Command Prompt)
netstat -ano | findstr :3783
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3783 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3783
From Windows
Test-NetConnection HOST -Port 3783
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3783

Block port 3783 in the firewall

ufw
sudo ufw deny 3783/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3783 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3783 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3783' -Direction Inbound -Protocol TCP -LocalPort 3783 -Action Block
ufw
sudo ufw deny 3783/udp
iptables
sudo iptables -A INPUT -p udp --dport 3783 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3783 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3783' -Direction Inbound -Protocol UDP -LocalPort 3783 -Action Block

Related ports

3781abcvoice-port3782iso-tp0s3784bfd-control3785bfd-echo

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