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Port 7511 (pafec-lm)

IANA assigns port 7511 to pafec-lm.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pafec-lm TCP pafec-lm Billy Dhillon -
pafec-lm UDP pafec-lm Billy Dhillon -

Check what is listening on port 7511

Linux: is anything listening on TCP 7511?
sudo ss -tlnp 'sport = :7511'
Linux: UDP 7511
sudo ss -ulnp 'sport = :7511'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7511
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7511 '
Windows (Command Prompt)
netstat -ano | findstr :7511
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7511 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7511
From Windows
Test-NetConnection HOST -Port 7511
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7511

Block port 7511 in the firewall

ufw
sudo ufw deny 7511/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7511 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7511 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7511' -Direction Inbound -Protocol TCP -LocalPort 7511 -Action Block
ufw
sudo ufw deny 7511/udp
iptables
sudo iptables -A INPUT -p udp --dport 7511 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7511 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7511' -Direction Inbound -Protocol UDP -LocalPort 7511 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.