- 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 7701: SCF nFAPI defining MAC/PHY split
Port 7701 is assigned by IANA to nfapi (SCF nFAPI defining MAC/PHY split).
7701
How nfapi works
Other servicesThe client sends a request to port 7701 and the nfapi service answers.
- Transport
- SCTP
- 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 7701 dangerous?
We have no specific security note for port 7701. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 7701
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| nfapi | 7701 | SCTP | SCF nFAPI defining MAC/PHY split | - | 2017-01-24 |
| - | 7701 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 7701, and is it reachable?
Linux
sudo ss -ltnup 'sport = :7701' # process listening on 7701
sudo lsof -nP -i :7701macOS
sudo lsof -nP -i :7701
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7701 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 7701 netstat -ano | findstr :7701
From another machine
nmap -p 7701 -sV <host> nc -zv <host> 7701
Block it in the firewall
sudo ufw deny 7701/sctp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 7701" -Direction Inbound -LocalPort 7701 -Protocol SCTP -Action Block # Windows
What is port 7701 used for?
Port 7701 is assigned by IANA to nfapi (SCF nFAPI defining MAC/PHY split).
Is port 7701 TCP or UDP?
Port 7701 is registered for SCTP.
Is it safe to open port 7701?
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 7701 is open?
On Linux run "ss -ltnup 'sport = :7701'", on macOS "lsof -nP -i :7701", and on Windows "netstat -ano | findstr :7701" to see the local process. From another machine, "nmap -p 7701 <host>" shows whether it is reachable.
Other other services ports
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