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feat(hosts/orion): improve security options

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This commit is contained in:
Price Hiller 2024-09-27 02:36:09 -05:00
parent f95b8f164e
commit 24ae20c854
Signed by: Price
GPG Key ID: C3FADDE7A8534BEB
3 changed files with 50 additions and 8 deletions
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6
hosts/orion/modules/polkit.nix
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@ -1,6 +0,0 @@
{ ... }:
{
security.polkit = {
enable = true;
};
}

49
hosts/orion/modules/security.nix Normal file
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@ -0,0 +1,49 @@
{ ... }:
{
security = {
polkit = {
enable = true;
};
sudo.execWheelOnly = true;
auditd.enable = true;
audit = {
enable = true;
rules = [
# Program Executions
"-a exit,always -F arch=b64 -S execve -F key=progexec"
# Home path access/modification
"-a always,exit -F arch=b64 -F dir=/home -F perm=war -F key=homeaccess"
# Kexec usage
"-a always,exit -F arch=b64 -S kexec_load -F key=KEXEC"
# Root directory access/modification
"-a always,exit -F arch=b64 -F dir=/root -F key=roothomeaccess -F perm=war"
# Failed Modifications of critcal paths
"-a always,exit -F arch=b64 -S open -F dir=/etc -F success=0 -F key=unauthedfileaccess"
"-a always,exit -F arch=b64 -S open -F dir=/bin -F success=0 -F key=unauthedfileaccess"
"-a always,exit -F arch=b64 -S open -F dir=/var -F success=0 -F key=unauthedfileaccess"
"-a always,exit -F arch=b64 -S open -F dir=/home -F success=0 -F key=unauthedfileaccess"
"-a always,exit -F arch=b64 -S open -F dir=/srv -F success=0 -F key=unauthedfileaccess"
"-a always,exit -F arch=b64 -S open -F dir=/boot -F success=0 -F key=unauthedfileaccess"
"-a always,exit -F arch=b64 -S open -F dir=/nix -F success=0 -F key=unauthedfileaccess"
"-a always,exit -F arch=b64 -S open -F dir=/persist -F success=0 -F key=unauthedfileaccess"
# File deletion events by users
"-a always,exit -F arch=b64 -S rmdir -S unlink -S unlinkat -S rename -S renameat -F auid>=1000 -F auid!=-1 -F key=delete"
# Root command executions
"-a always,exit -F arch=b64 -F euid=0 -F auid>=1000 -F auid!=-1 -S execve -F key=rootcmd"
];
};
};
boot.kernel.sysctl = {
"net.ipv4.conf.all.log_martions" = true;
"net.ipv4.conf.all.rp_filter" = 1;
"net.ipv4.conf.default.log_martions" = true;
"net.ipv4.conf.default.rp_filter" = 1;
"net.ipv4.icmp_echo_ignore_broadcasts" = 1;
};
}

1
hosts/orion/os/boot.nix
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@ -39,7 +39,6 @@ in
};
kernelPackages = pkgs.linuxPackages_latest;
kernelModules = [ "kvm-intel" ];
kernelParams = [ "audit=1" ];
extraModulePackages = [ ];
initrd = {
availableKernelModules = [