CyberHunter
Local dataset, no network
// Other services

Port 3762: GBS SnapMail Protocol

Port 3762 is assigned by IANA to gbs-smp (GBS SnapMail Protocol).

3762

How gbs-smp works

Other services
client:3762gbs-smpresponse client:3762gbs-smpresponse

The client sends a request to port 3762 and the gbs-smp 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
Registered (1024-49151)
Category
Other services
01 Security

Is port 3762 dangerous?

We have no specific security note for port 3762. 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 3762

ServicePortTransportDescriptionReferenceUpdated
gbs-smp 3762 TCP, UDP GBS SnapMail Protocol - 2003-06

// source: IANA service name and port number registry

03 Check it

Which program uses port 3762, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3762'      # process listening on 3762
sudo lsof -nP -i :3762

macOS

sudo lsof -nP -i :3762

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3762 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3762
netstat -ano | findstr :3762

From another machine

nmap -p 3762 -sV <host>
sudo nmap -sU -p 3762 <host>
nc -zv <host> 3762

Block it in the firewall

sudo ufw deny 3762/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3762" -Direction Inbound -LocalPort 3762 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3762 used for?

Port 3762 is assigned by IANA to gbs-smp (GBS SnapMail Protocol).

Is port 3762 TCP or UDP?

Port 3762 is registered for TCP and UDP.

Is it safe to open port 3762?

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 3762 is open?

On Linux run "ss -ltnup 'sport = :3762'", on macOS "lsof -nP -i :3762", and on Windows "netstat -ano | findstr :3762" to see the local process. From another machine, "nmap -p 3762 <host>" shows whether it is reachable.

05 Related
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