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// Other services

Port 248: bhfhs

Port 248 is assigned by IANA to bhfhs (bhfhs).

248

How bhfhs works

Other services
client:248bhfhsresponse client:248bhfhsresponse

The client sends a request to port 248 and the bhfhs service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Well-known (0-1023)
Category
Other services
01 Security

Is port 248 dangerous?

We have no specific security note for port 248. Its risk depends on the program actually listening on it. General advice for other services services:

  • 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.
02 Registry

IANA registry entries for port 248

ServicePortTransportDescriptionReferenceUpdated
bhfhs 248 TCP, UDP bhfhs - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 248, and is it reachable?

Linux

sudo ss -ltnup 'sport = :248'      # process listening on 248
sudo lsof -nP -i :248

macOS

sudo lsof -nP -i :248

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 248 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 248
netstat -ano | findstr :248

From another machine

nmap -p 248 -sV <host>
sudo nmap -sU -p 248 <host>
nc -zv <host> 248

Block it in the firewall

sudo ufw deny 248/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 248" -Direction Inbound -LocalPort 248 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 248 used for?

Port 248 is assigned by IANA to bhfhs (bhfhs).

Is port 248 TCP or UDP?

Port 248 is registered for TCP and UDP.

Is it safe to open port 248?

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 248 is open?

On Linux run "ss -ltnup 'sport = :248'", on macOS "lsof -nP -i :248", and on Windows "netstat -ano | findstr :248" to see the local process. From another machine, "nmap -p 248 <host>" shows whether it is reachable.

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