A new update for ps5-payload-klogsrv has been released , the payload developed by developer John Törnblom allows us to redirect /dev/klogto sockets connected to port 3232 of the PlayStation 5 console .

The payload could be useful for homebrew developers working on modified PlayStation 5 consoles, allowing them to monitor errors and debug messages in real time.

Installation and configuration

To use ps5-payload-klogsrv , you need to compile the payload (if you are not using a pre-compiled version) and send it to the PlayStation 5 console .

Prerequisites

Jailbroken PS5: The console must have a vulnerable firmware (e.g. 3.00–4.51, or up to 10.0x with recent updates) and an active exploit (e.g. BD-J or WebKit).
POSIX Machine: A Linux system (e.g. Ubuntu) with ps5-payload-sdk installed.
Network Tools: Tools like netcat (nc), curl or telnet to interact with the socket server.
Network Connection: Your PS5 and PC must be on the same network to communicate.

Compilation (optional, if not using a pre-compiled release)

Installing the SDK:

Download ps5-payload-sdk from GitHub .
Installing dependencies on a Debian-based system:sudo apt-get install bash socat cmake pkg-config clang-15 lld-15
Extract the SDK to a directory, for example:

wget https://github.com/john-tornblom/ps5-payload-sdk/releases/download/releases/v0.10/ps5-payload-sdk.tar.gz
mkdir -p /opt/ps5-payload-sdk-0.10/
tar xvf ps5-payload-sdk.tar.gz -C /opt/ps5-payload-sdk-0.10/

Set the environment variable:export PS5_PAYLOAD_SDK=/opt/ps5-payload-sdk

Compiling klogsrv:

Clone the ps5-payload-dev/klogsrv repository:

git clone https://github.com/ps5-payload-dev/klogsrv
cd klogsrv

Fill in the payload:

export PS5_PAYLOAD_SDK=/opt/ps5-payload-sdk
make

This will generate the file klogsrv.elfin your project directory.

Sending the payload to the PS5

Method 1: Manual via netcat:

Download a pre-built release from GitHub.
Launch an ELF loader on the PS5 (e.g. elfldr.elf) via an exploit (e.g. BD-J or WebKit). The ELF loader listens on port 9021.
Sending the payload to the PS5:

export PS5_HOST=ps5 # Sostituisci "ps5" con l’IP della tua PS5
nc -q0 $PS5_HOST 9021 < klogsrv.elf

Alternative, if using a compressed release:

wget -q -O - https://github.com/ps5-payload-dev/klogsrv/releases/latest/download/Payload.zip | gunzip -c -d | nc -q0 $PS5_HOST 9021

Method 2: Via PS5 Payload Loader:

Use a homebrew app like cy33hc’s PS5 Payload Loader.
Download the file klogsrv.elfand copy it to the folder /data/homebrew/payload-loader/payloadson your PS5 (via FTP or USB).
Launch PS5 JAR Loader from a Blu-ray disc (BD-R/BD-RE) with the cy33hc ISO, then select “Payload Loader” from the Homebrew Launcher to run klogsrv.

Connecting to the socket server

Once klogsrv is running on your PS5, connect to port 3232 from your PC:

export PS5_HOST=ps5 # Sostituisci con l’IP della PS5
nc $PS5_HOST 3232

System logs will be transmitted to the terminal in real time.

Formatting logs (optional)

Use the script klogfmt.pyto format or filter logs:

nc $PS5_HOST 3232 | python klogfmt.py

The script is included in the repository and can be customized to highlight errors or specific information.

Technical details

Port: klogsrv uses port 3232 to transmit logs. Make sure there are no firewalls blocking it.

Compatibility with other payloads

It works well with elfldr.elf(ELF loader), ftpsrv.elf(FTP server on port 2121) and websrv.elf(web server on port 8080), it is also integrated into solutions like etaHEN, which includes klogsrv among its payloads.

Stability

ps5-payload-klogsrv is designed to stay active even in idle mode, thanks to the ELF loader that runs it in the background in the SceRedisServer process. If the payload crashes, the ELF loader continues to run, ensuring robustness.

Limitations

Requires a jailbroken PS5, so it’s limited to vulnerable firmwares.
The network connection must be stable to avoid interruptions.
It does not support full TTY interfaces, so it is not suitable for complex interactive commands.