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// Other services

Port 12013: Vipera Messaging Service over SSL Communication

Port 12013 is assigned by IANA to vipera-ssl (Vipera Messaging Service over SSL Communication).

12013

How vipera-ssl works

Other services
client:12013#%&@!x9response? client:12013#%&@!x9response?

The client sends a request to port 12013 and the vipera-ssl service answers. Everything is encrypted: someone on the path only sees unreadable bytes.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
EncryptedTLS or built-in crypto
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 12013 dangerous?

We have no specific security note for port 12013. 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 12013

ServicePortTransportDescriptionReferenceUpdated
vipera-ssl 12013 TCP, UDP Vipera Messaging Service over SSL Communication - 2008-01-16

// source: IANA service name and port number registry

03 Check it

Which program uses port 12013, and is it reachable?

Linux

sudo ss -ltnup 'sport = :12013'      # process listening on 12013
sudo lsof -nP -i :12013

macOS

sudo lsof -nP -i :12013

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 12013 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 12013
netstat -ano | findstr :12013

From another machine

nmap -p 12013 -sV <host>
sudo nmap -sU -p 12013 <host>
nc -zv <host> 12013

Block it in the firewall

sudo ufw deny 12013/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 12013" -Direction Inbound -LocalPort 12013 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 12013 used for?

Port 12013 is assigned by IANA to vipera-ssl (Vipera Messaging Service over SSL Communication).

Is port 12013 TCP or UDP?

Port 12013 is registered for TCP and UDP.

Is it safe to open port 12013?

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 12013 is open?

On Linux run "ss -ltnup 'sport = :12013'", on macOS "lsof -nP -i :12013", and on Windows "netstat -ano | findstr :12013" to see the local process. From another machine, "nmap -p 12013 <host>" shows whether it is reachable.

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