HTTPfy

Port 9995 (palace-4)

IANA assigns port 9995 to palace-4: Palace-4.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
palace-4 TCP Palace-4 Douglas Crockford -
palace-4 UDP Palace-4 Douglas Crockford -

Check what is listening on port 9995

Linux: is anything listening on TCP 9995?
sudo ss -tlnp 'sport = :9995'
Linux: UDP 9995
sudo ss -ulnp 'sport = :9995'
Linux / macOS: which process owns the port
sudo lsof -nP -i :9995
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':9995 '
Windows (Command Prompt)
netstat -ano | findstr :9995
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9995 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 9995
From Windows
Test-NetConnection HOST -Port 9995
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 9995

Block port 9995 in the firewall

ufw
sudo ufw deny 9995/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 9995 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 9995 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 9995' -Direction Inbound -Protocol TCP -LocalPort 9995 -Action Block
ufw
sudo ufw deny 9995/udp
iptables
sudo iptables -A INPUT -p udp --dport 9995 -j DROP
nftables
sudo nft add rule inet filter input udp dport 9995 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 9995' -Direction Inbound -Protocol UDP -LocalPort 9995 -Action Block

Related ports

9993palace-29994palace-39996palace-59997Splunk forwarder receiving

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