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// Other services

Port 3495: securitylayer over tcp

Port 3495 is assigned by IANA to seclayer-tcp (securitylayer over tcp).

3495

How seclayer-tcp works

Other services
client:3495seclayer-tcpresponse client:3495seclayer-tcpresponse

The client sends a request to port 3495 and the seclayer-tcp 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 3495 dangerous?

We have no specific security note for port 3495. 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 3495

ServicePortTransportDescriptionReferenceUpdated
seclayer-tcp 3495 TCP, UDP securitylayer over tcp - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3495, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3495'      # process listening on 3495
sudo lsof -nP -i :3495

macOS

sudo lsof -nP -i :3495

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3495 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3495
netstat -ano | findstr :3495

From another machine

nmap -p 3495 -sV <host>
sudo nmap -sU -p 3495 <host>
nc -zv <host> 3495

Block it in the firewall

sudo ufw deny 3495/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3495" -Direction Inbound -LocalPort 3495 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3495 used for?

Port 3495 is assigned by IANA to seclayer-tcp (securitylayer over tcp).

Is port 3495 TCP or UDP?

Port 3495 is registered for TCP and UDP.

Is it safe to open port 3495?

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 3495 is open?

On Linux run "ss -ltnup 'sport = :3495'", on macOS "lsof -nP -i :3495", and on Windows "netstat -ano | findstr :3495" to see the local process. From another machine, "nmap -p 3495 <host>" shows whether it is reachable.

05 Related
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