- Close the port if nothing on the host needs it.
- Identify the process that listens on it (commands below) before opening it in a firewall.
- Expose a service only to the networks that use it.
Port 7784: Seamless Bidirectional Forwarding Detection (S-BFD)
Port 7784 is assigned by IANA to s-bfd (Seamless Bidirectional Forwarding Detection (S-BFD)).
7784
How s-bfd works
Other servicesThe client sends a request to port 7784 and the s-bfd 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
- Other services
Is port 7784 dangerous?
We have no specific security note for port 7784. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 7784
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| s-bfd | 7784 | UDP | Seamless Bidirectional Forwarding Detection (S-BFD) | RFC 7881 | 2016-07-14 |
| - | 7784 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 7784, and is it reachable?
Linux
sudo ss -ltnup 'sport = :7784' # process listening on 7784
sudo lsof -nP -i :7784macOS
sudo lsof -nP -i :7784
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7784 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 7784 netstat -ano | findstr :7784
From another machine
nmap -p 7784 -sV <host> sudo nmap -sU -p 7784 <host> nc -zv <host> 7784
Block it in the firewall
sudo ufw deny 7784/udp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 7784" -Direction Inbound -LocalPort 7784 -Protocol UDP -Action Block # Windows
What is port 7784 used for?
Port 7784 is assigned by IANA to s-bfd (Seamless Bidirectional Forwarding Detection (S-BFD)).
Is port 7784 TCP or UDP?
Port 7784 is registered for UDP.
Is it safe to open port 7784?
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. Close the port if nothing on the host needs it.
How do I check if port 7784 is open?
On Linux run "ss -ltnup 'sport = :7784'", on macOS "lsof -nP -i :7784", and on Windows "netstat -ano | findstr :7784" to see the local process. From another machine, "nmap -p 7784 <host>" shows whether it is reachable.
Other other services ports
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp