HTTPfy

Port 7491 (telops-lmd)

IANA assigns port 7491 to telops-lmd.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
telops-lmd TCP telops-lmd David Spencer -
telops-lmd UDP telops-lmd David Spencer -

Check what is listening on port 7491

Linux: is anything listening on TCP 7491?
sudo ss -tlnp 'sport = :7491'
Linux: UDP 7491
sudo ss -ulnp 'sport = :7491'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7491
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7491 '
Windows (Command Prompt)
netstat -ano | findstr :7491
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7491 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7491
From Windows
Test-NetConnection HOST -Port 7491
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7491

Block port 7491 in the firewall

ufw
sudo ufw deny 7491/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7491 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7491 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7491' -Direction Inbound -Protocol TCP -LocalPort 7491 -Action Block
ufw
sudo ufw deny 7491/udp
iptables
sudo iptables -A INPUT -p udp --dport 7491 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7491 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7491' -Direction Inbound -Protocol UDP -LocalPort 7491 -Action Block

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