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Port 3181 (bmcpatrolagent)

IANA assigns port 3181 to bmcpatrolagent: BMC Patrol Agent.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
bmcpatrolagent TCP BMC Patrol Agent - -
bmcpatrolagent UDP BMC Patrol Agent - -

Check what is listening on port 3181

Linux: is anything listening on TCP 3181?
sudo ss -tlnp 'sport = :3181'
Linux: UDP 3181
sudo ss -ulnp 'sport = :3181'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3181
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3181 '
Windows (Command Prompt)
netstat -ano | findstr :3181
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3181 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3181
From Windows
Test-NetConnection HOST -Port 3181
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3181

Block port 3181 in the firewall

ufw
sudo ufw deny 3181/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3181 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3181 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3181' -Direction Inbound -Protocol TCP -LocalPort 3181 -Action Block
ufw
sudo ufw deny 3181/udp
iptables
sudo iptables -A INPUT -p udp --dport 3181 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3181 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3181' -Direction Inbound -Protocol UDP -LocalPort 3181 -Action Block

Related ports

3179h2gf-w-2m3180mc-brk-srv3182bmcpatrolrnvu3183cops-tls

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