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Port 1548 (axon-lm)

IANA assigns port 1548 to axon-lm: Axon License Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
axon-lm TCP Axon License Manager Mark Pearce -
axon-lm UDP Axon License Manager Mark Pearce -

Check what is listening on port 1548

Linux: is anything listening on TCP 1548?
sudo ss -tlnp 'sport = :1548'
Linux: UDP 1548
sudo ss -ulnp 'sport = :1548'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1548
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1548 '
Windows (Command Prompt)
netstat -ano | findstr :1548
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1548 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1548
From Windows
Test-NetConnection HOST -Port 1548
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1548

Block port 1548 in the firewall

ufw
sudo ufw deny 1548/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1548 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1548 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1548' -Direction Inbound -Protocol TCP -LocalPort 1548 -Action Block
ufw
sudo ufw deny 1548/udp
iptables
sudo iptables -A INPUT -p udp --dport 1548 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1548 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1548' -Direction Inbound -Protocol UDP -LocalPort 1548 -Action Block

Related ports

1546abbaccuray1547laplink1549shivahose, shivasound15503m-image-lm

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