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Port 1546 (abbaccuray)

IANA assigns port 1546 to abbaccuray.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
abbaccuray TCP abbaccuray John Wendt -
abbaccuray UDP abbaccuray John Wendt -

Check what is listening on port 1546

Linux: is anything listening on TCP 1546?
sudo ss -tlnp 'sport = :1546'
Linux: UDP 1546
sudo ss -ulnp 'sport = :1546'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1546
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1546 '
Windows (Command Prompt)
netstat -ano | findstr :1546
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1546 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1546
From Windows
Test-NetConnection HOST -Port 1546
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1546

Block port 1546 in the firewall

ufw
sudo ufw deny 1546/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1546 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1546 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1546' -Direction Inbound -Protocol TCP -LocalPort 1546 -Action Block
ufw
sudo ufw deny 1546/udp
iptables
sudo iptables -A INPUT -p udp --dport 1546 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1546 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1546' -Direction Inbound -Protocol UDP -LocalPort 1546 -Action Block

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