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Port 6148 (ricardo-lm)

IANA assigns port 6148 to ricardo-lm: Ricardo North America License Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ricardo-lm TCP Ricardo North America License Manager M Flemming -
ricardo-lm UDP Ricardo North America License Manager M Flemming -

Check what is listening on port 6148

Linux: is anything listening on TCP 6148?
sudo ss -tlnp 'sport = :6148'
Linux: UDP 6148
sudo ss -ulnp 'sport = :6148'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6148
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6148 '
Windows (Command Prompt)
netstat -ano | findstr :6148
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6148 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6148
From Windows
Test-NetConnection HOST -Port 6148
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6148

Block port 6148 in the firewall

ufw
sudo ufw deny 6148/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6148 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6148 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6148' -Direction Inbound -Protocol TCP -LocalPort 6148 -Action Block
ufw
sudo ufw deny 6148/udp
iptables
sudo iptables -A INPUT -p udp --dport 6148 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6148 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6148' -Direction Inbound -Protocol UDP -LocalPort 6148 -Action Block

Related ports

1522ricardo-lm6146lonewolf-lm6147montage-lm6149tal-pod6159efb-aci

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