105 lines
2.6 KiB
Nix
105 lines
2.6 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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let
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testServiceConfigs = {
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zpool_ssds = "";
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zpool_hdds = "";
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};
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securityModule = import ../modules/security.nix;
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sshModule =
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{
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config,
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lib,
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pkgs,
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...
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}:
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{
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imports = [
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(import ../services/ssh.nix {
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inherit config lib pkgs;
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username = "testuser";
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})
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];
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};
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in
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pkgs.testers.runNixOSTest {
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name = "fail2ban-ssh";
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nodes = {
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server =
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{
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config,
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lib,
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pkgs,
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...
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}:
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{
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imports = [
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securityModule
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sshModule
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];
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# Override for testing - enable password auth
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services.openssh.settings.PasswordAuthentication = lib.mkForce true;
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users.users.testuser = {
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isNormalUser = true;
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password = "correctpassword";
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};
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networking.firewall.allowedTCPPorts = [ 22 ];
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};
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client = {
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environment.systemPackages = with pkgs; [
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sshpass
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openssh
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];
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};
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};
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testScript = ''
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import time
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start_all()
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server.wait_for_unit("sshd.service")
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server.wait_for_unit("fail2ban.service")
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server.wait_for_open_port(22)
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time.sleep(2)
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with subtest("Verify sshd jail is active"):
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status = server.succeed("fail2ban-client status")
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assert "sshd" in status, f"sshd jail not found in: {status}"
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with subtest("Generate failed SSH login attempts"):
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# Use -4 to force IPv4, timeout and NumberOfPasswordPrompts=1 to ensure quick failure
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# maxRetry is 3 in our config, so 4 attempts should trigger a ban
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for i in range(4):
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client.execute(
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"timeout 5 sshpass -p 'wrongpassword' ssh -4 -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ConnectTimeout=3 -o NumberOfPasswordPrompts=1 testuser@server echo test 2>/dev/null || true"
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)
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time.sleep(1)
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with subtest("Verify IP is banned"):
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# Wait for fail2ban to process the logs and apply the ban
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time.sleep(5)
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status = server.succeed("fail2ban-client status sshd")
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print(f"sshd jail status: {status}")
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# Check that at least 1 IP is banned
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import re
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match = re.search(r"Currently banned:\s*(\d+)", status)
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assert match and int(match.group(1)) >= 1, f"Expected at least 1 banned IP, got: {status}"
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with subtest("Verify banned client cannot connect"):
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# Use -4 to test with same IP that was banned
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exit_code = client.execute("timeout 3 nc -4 -z -w 2 server 22")[0]
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assert exit_code != 0, "Connection should be blocked for banned IP"
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'';
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}
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