HTTPfy

Port 1597 (orbplus-iiop)

IANA assigns port 1597 to orbplus-iiop.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
orbplus-iiop TCP orbplus-iiop Robert A Kukura -
orbplus-iiop UDP orbplus-iiop Robert A Kukura -

Check what is listening on port 1597

Linux: is anything listening on TCP 1597?
sudo ss -tlnp 'sport = :1597'
Linux: UDP 1597
sudo ss -ulnp 'sport = :1597'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1597
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1597 '
Windows (Command Prompt)
netstat -ano | findstr :1597
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1597 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1597
From Windows
Test-NetConnection HOST -Port 1597
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1597

Block port 1597 in the firewall

ufw
sudo ufw deny 1597/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1597 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1597 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1597' -Direction Inbound -Protocol TCP -LocalPort 1597 -Action Block
ufw
sudo ufw deny 1597/udp
iptables
sudo iptables -A INPUT -p udp --dport 1597 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1597 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1597' -Direction Inbound -Protocol UDP -LocalPort 1597 -Action Block

Related ports

1595radio1596radio-sm, radio-bc1598picknfs1599simbaservices

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