Deadlock Server Picker for Linux

DISCLAIMER: This project was vibecoded with AI assistance. While functional, use it at your own risk. I'm not responsible for any issues that may arise from using this software.

A native Linux tool to block/unblock Deadlock game server relays using iptables or nftables, with an interactive TUI.

Features

• Interactive TUI with live server status display
• Block/unblock specific servers or entire regions
• Built-in region presets (NA, EU, Asia, etc.)
• Custom presets — save and load your favorite server configs
• Ping monitoring with latency display and history tracking
• Geographic server locations with multi-column display
• Dry-run mode for testing without firewall changes
• Auto-detects iptables vs nftables
• Automatic firewall cleanup on exit

Requirements

• Linux
• Python 3.10+
• iptables or nftables
• Root/sudo access

Installation

From AUR (Arch Linux)

yay -S deadlock-server-picker

From Source

git clone https://github.com/shibne/DeadlockServerPicker-linux.git
cd DeadlockServerPicker-linux
pip install -e .

Usage

Launch the TUI:

dsp
# or
deadlock-server-picker

For testing without modifying firewall rules:

dsp --dry-run

TUI Commands

Once inside the TUI, type commands at the >>> prompt:

Command	Description
list [region]	Show all servers with geographic info (alias: l, ls)
block <server>	Block a specific server
unblock <server>	Unblock a specific server
allow <region>	Allow only a region (block all others)
block-region <region>	Block all servers in a region
unblock-region <region>	Unblock all servers in a region
regions	List available regions (alias: r)
ping [region]	Ping servers with live progress
history [server]	Show latency history
best	Show servers with best latency
preset	List/create/delete custom presets
status	Show current blocking status (alias: s)
reset	Unblock all servers
help	Show all commands (alias: h, ?)
clear	Clear output (alias: c)
quit	Exit (alias: q)

Region Aliases

Alias	Region
na, nae, naw	North America / East / West
sa	South America
eu, euw, eue	Europe / West / East
asia, apac	Asia / Asia Pacific
india, jp, kr	India / Japan / Korea
oce	Oceania
me	Middle East
af	Africa

How It Works

The tool fetches server relay data from Valve's Steam API and creates iptables/nftables rules to block traffic to specific server IPs. Blocked servers are skipped during matchmaking.

Rules are created in a dedicated DEADLOCK_SERVER_PICKER chain to avoid interfering with other firewall rules. All rules are automatically cleaned up when exiting the TUI.

FAQ

Will I get banned?

No. This tool only manages local firewall rules and does not modify any game files.

Why am I still connecting to blocked servers?

Steam Datagram Relay may find alternative routes. For best results, only block servers you don't want rather than blocking everything except one region.

Why does it need sudo?

iptables/nftables requires elevated privileges to add or remove firewall rules.

License

GPL-3.0

Credits

• Inspired by FN-FAL113's CS2 Server Picker for Windows
• Built with Claude

Disclaimer

This is an unofficial, community-made tool. It is not affiliated with, endorsed by, or associated with Valve Corporation in any way.

Use at your own risk. I am not responsible for any damages, issues, or consequences that may arise from using this software. This includes but is not limited to system instability, network issues, or any other problems that may occur. By using this tool, you accept full responsibility for any outcomes.