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// Network services

Port 15118: v2g Supply Equipment Communication Controller Discovery Protocol

Port 15118 is assigned by IANA to v2g-secc (v2g Supply Equipment Communication Controller Discovery Protocol).

15118

How v2g-secc works

Network services
client:15118v2g-seccresponse client:15118v2g-seccresponse

The client sends a request to port 15118 and the v2g-secc service answers.

Transport
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
Network services
01 Security

Is port 15118 dangerous?

We have no specific security note for port 15118. Its risk depends on the program actually listening on it. General advice for network services services:

  • Answer only the networks that need the service (no open resolvers, relays or reflectors).
  • UDP services can be abused for DDoS amplification: rate-limit or block them at the edge.
  • Disable legacy test services that have no use in production.
02 Registry

IANA registry entries for port 15118

ServicePortTransportDescriptionReferenceUpdated
v2g-secc 15118 UDP v2g Supply Equipment Communication Controller Discovery Protocol - 2011-04-06
-15118-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 15118, and is it reachable?

Linux

sudo ss -ltnup 'sport = :15118'      # process listening on 15118
sudo lsof -nP -i :15118

macOS

sudo lsof -nP -i :15118

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 15118 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 15118
netstat -ano | findstr :15118

From another machine

nmap -p 15118 -sV <host>
sudo nmap -sU -p 15118 <host>
nc -zv <host> 15118

Block it in the firewall

sudo ufw deny 15118/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 15118" -Direction Inbound -LocalPort 15118 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 15118 used for?

Port 15118 is assigned by IANA to v2g-secc (v2g Supply Equipment Communication Controller Discovery Protocol).

Is port 15118 TCP or UDP?

Port 15118 is registered for UDP.

Is it safe to open port 15118?

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. Answer only the networks that need the service (no open resolvers, relays or reflectors).

How do I check if port 15118 is open?

On Linux run "ss -ltnup 'sport = :15118'", on macOS "lsof -nP -i :15118", and on Windows "netstat -ano | findstr :15118" to see the local process. From another machine, "nmap -p 15118 <host>" shows whether it is reachable.

05 Related
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