# Thread: Four Servers - Signatures on two

1. Originally Posted by Killswitch
Ask the addon authors for the correct v.2 .bisign and .bikey files for those addons. Unfortunately, it is not uncommon that addon makers fail to get their addons signed correctly... The .bikey files should be in "the arma 2 root folder Key's section", not in 'the modifications "Keys" folder'.
The server runs on v1 signatures as the majority of addons are v1 still.

For the server the signatures in the root Keys section, however for clients the Keys are in the modifications Keys section which is read when they connect to the server.

2. V. 2 .bisign files are backwards-compatible with v1 signature checking. Download the BIS signing tools from DSUtils_2 and use the DSCheckSignatures.exe tool to verify that the troublesome addons have correct signature files.

For your setup, that means running something like this in a command window (cmd.exe, "DOS prompt")
Code:
C:\path\to\DSCheckSignatures.exe E:\ArmA\@FOG\addons\ E:\ArmA\Keys
For the server the signatures in the root Keys section, however for clients the Keys are in the modifications Keys section which is read when they connect to the server.
The addon signatures (*.bisign files) should be where the addons are. The Keys folder on the server should have *.bikey files.

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