- Answer only the networks that need the service (no open resolvers, relays or reflectors).
- UDP services can be abused for DDoS amplification: rate-limit or block them at the edge.
- Disable legacy test services that have no use in production.
Port 5794: Simple Peered Discovery Protocol
Port 5794 is assigned by IANA to spdp (Simple Peered Discovery Protocol).
5794
How spdp works
Network servicesThe client sends a request to port 5794 and the spdp service answers.
- Transport
- UDP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
- Network services
Is port 5794 dangerous?
We have no specific security note for port 5794. Its risk depends on the program actually listening on it. General advice for network services services:
IANA registry entries for port 5794
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| spdp | 5794 | UDP | Simple Peered Discovery Protocol | - | 2010-05-27 |
| - | 5794 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 5794, and is it reachable?
Linux
sudo ss -ltnup 'sport = :5794' # process listening on 5794
sudo lsof -nP -i :5794macOS
sudo lsof -nP -i :5794
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5794 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 5794 netstat -ano | findstr :5794
From another machine
nmap -p 5794 -sV <host> sudo nmap -sU -p 5794 <host> nc -zv <host> 5794
Block it in the firewall
sudo ufw deny 5794/udp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 5794" -Direction Inbound -LocalPort 5794 -Protocol UDP -Action Block # Windows
What is port 5794 used for?
Port 5794 is assigned by IANA to spdp (Simple Peered Discovery Protocol).
Is port 5794 TCP or UDP?
Port 5794 is registered for UDP.
Is it safe to open port 5794?
It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Answer only the networks that need the service (no open resolvers, relays or reflectors).
How do I check if port 5794 is open?
On Linux run "ss -ltnup 'sport = :5794'", on macOS "lsof -nP -i :5794", and on Windows "netstat -ano | findstr :5794" to see the local process. From another machine, "nmap -p 5794 <host>" shows whether it is reachable.
Other network services ports
:53 DNS tcp · udp · moderate risk :135 MS RPC tcp · udp · high risk :123 NTP udp · tcp · moderate risk :67 DHCP server udp · tcp · moderate risk :111 rpcbind tcp · udp · high risk :9100 Raw printing (JetDirect) tcp · udp · high risk :631 IPP / CUPS tcp · udp · high risk :5353 mDNS udp · tcp · moderate risk