CyberHunter
Local dataset, no network
// Other services

Port 348: Cabletron Management Protocol

Port 348 is assigned by IANA to csi-sgwp (Cabletron Management Protocol).

348

How csi-sgwp works

Other services
client:348csi-sgwpresponse client:348csi-sgwpresponse

The client sends a request to port 348 and the csi-sgwp 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 348 dangerous?

We have no specific security note for port 348. 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 348

ServicePortTransportDescriptionReferenceUpdated
csi-sgwp 348 TCP, UDP Cabletron Management Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 348, and is it reachable?

Linux

sudo ss -ltnup 'sport = :348'      # process listening on 348
sudo lsof -nP -i :348

macOS

sudo lsof -nP -i :348

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 348 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 348
netstat -ano | findstr :348

From another machine

nmap -p 348 -sV <host>
sudo nmap -sU -p 348 <host>
nc -zv <host> 348

Block it in the firewall

sudo ufw deny 348/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 348" -Direction Inbound -LocalPort 348 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 348 used for?

Port 348 is assigned by IANA to csi-sgwp (Cabletron Management Protocol).

Is port 348 TCP or UDP?

Port 348 is registered for TCP and UDP.

Is it safe to open port 348?

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 348 is open?

On Linux run "ss -ltnup 'sport = :348'", on macOS "lsof -nP -i :348", and on Windows "netstat -ano | findstr :348" to see the local process. From another machine, "nmap -p 348 <host>" shows whether it is reachable.

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