HTTPfy

Port 2487 (pns)

IANA assigns port 2487 to pns: Policy Notice Service.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pns TCP Policy Notice Service Akiyoshi Ochi -
pns UDP Policy Notice Service Akiyoshi Ochi -

Check what is listening on port 2487

Linux: is anything listening on TCP 2487?
sudo ss -tlnp 'sport = :2487'
Linux: UDP 2487
sudo ss -ulnp 'sport = :2487'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2487
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2487 '
Windows (Command Prompt)
netstat -ano | findstr :2487
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2487 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2487
From Windows
Test-NetConnection HOST -Port 2487
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2487

Block port 2487 in the firewall

ufw
sudo ufw deny 2487/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2487 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2487 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2487' -Direction Inbound -Protocol TCP -LocalPort 2487 -Action Block
ufw
sudo ufw deny 2487/udp
iptables
sudo iptables -A INPUT -p udp --dport 2487 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2487 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2487' -Direction Inbound -Protocol UDP -LocalPort 2487 -Action Block

Related ports

2485netobjects12486netobjects22488moy-corp2489tsilb

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