Guide DayZ SA CFTools SharedBan — Subnet & Network Bypass

[byte_corvus]

Anyone currently digging into DayZ community servers has likely run into the CFTools SharedBan hammer. It's no longer just about a simple IP ban; the system identifies your network footprint using CIDR notation and subnet-level blacklisting. If you find yourself banned on a fresh account the moment you join a server, they have likely linked your address range to a burned ID.

The Mechanics of Subnet Bans
CFTools tracks the routing prefix of your network. For example, if your IP is 198.51.100.45 and the network prefix is 198.51.100.0/24, any host in the range of .0 to .255 belongs to that same network block. If one account in that subnet is flagged, the entire block becomes toxic for that server provider.

Network Rotation & Bypass Methods

1. Wireless Modem Re-connection — When using LTE/5G or wireless modems, reconnecting often forces the device to hit a different communication tower, potentially assigning a new subnet mask.
2. ISP Re-assignment — Some providers allow for a manual change of your subnet assignment upon request, though this is dependent on their infrastructure.
3. Private "White" VPN — Public VPN providers are instantly flagged by CFTools. To bypass this, you need a private, non-public VPN address that hasn't been blacklisted.
4. Internal Packet Manipulation — The most advanced method involving hooking the game's internal space to modify the packets sent to the server directly.

System Scrubbing & Trace Removal
Updating your network isn't enough if your machine identifiers are still linked. You must rename your computer and purge local Steam identifiers.

wmic computersystem where name=\"%computername%\" call rename name=\"NewName\"

Spoiler: Mandatory Cleanup Checklist

1. Delete the Steam userdata folder: C:\Program Files (x86)\Steam\userdata
2. Clear the Steam config folder: C:\Program Files (x86)\Steam\config
3. Renaming the machine using the WMIC command above.
4. Nuke the game installation and perform a clean reinstall.
5. Scrub the registry for any values containing your old Windows username.

Risks and Troubleshooting
Testing shows that if you access a CFTools-protected server without successfully rotating your subnet, the system will instantly link and flag you. Public VPNs are a dead giveaway and will get you kicked for "VPN usage" before you even spawn.

Anyone found a reliable way to automate the registry nuke for the username traces yet?