HTTPfy

Port 1247 (visionpyramid)

IANA assigns port 1247 to visionpyramid: VisionPyramid.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
visionpyramid TCP VisionPyramid Gavin Hutchinson -
visionpyramid UDP VisionPyramid Gavin Hutchinson -

Check what is listening on port 1247

Linux: is anything listening on TCP 1247?
sudo ss -tlnp 'sport = :1247'
Linux: UDP 1247
sudo ss -ulnp 'sport = :1247'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1247
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1247 '
Windows (Command Prompt)
netstat -ano | findstr :1247
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1247 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1247
From Windows
Test-NetConnection HOST -Port 1247
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1247

Block port 1247 in the firewall

ufw
sudo ufw deny 1247/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1247 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1247 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1247' -Direction Inbound -Protocol TCP -LocalPort 1247 -Action Block
ufw
sudo ufw deny 1247/udp
iptables
sudo iptables -A INPUT -p udp --dport 1247 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1247 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1247' -Direction Inbound -Protocol UDP -LocalPort 1247 -Action Block

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