V8.03.768.2025.06.09

Signed-off-by: Marc S. Weidner <msw@coresecret.dev>

config/includes.chroot/etc/ssh/sshd_config

@@ -9,7 +9,7 @@
 # SPDX-PackageName: CISS.debian.live.builder
 # SPDX-Security-Contact: security@coresecret.eu
 
-### Version Master V8.03.644.2025.06.07
+### Version Master V8.03.768.2025.06.09
 
 ### https://www.ssh-audit.com/
 ### ssh -Q cipher | cipher-auth | compression | kex | kex-gss | key | key-cert | key-plain | key-sig | mac | protocol-version | sig

config/includes.chroot/etc/sysctl.d/99_local.hardened

@@ -9,7 +9,7 @@
 # SPDX-PackageName: CISS.debian.live.builder
 # SPDX-Security-Contact: security@coresecret.eu
 
-### Version Master V8.03.644.2025.06.07
+### Version Master V8.03.768.2025.06.09
 
 ### https://docs.kernel.org/
 ### https://github.com/a13xp0p0v/kernel-hardening-checker/

config/includes.chroot/preseed/.iso/preseed_hash_generator.sh

@@ -10,7 +10,7 @@
 # SPDX-PackageName: CISS.debian.live.builder
 # SPDX-Security-Contact: security@coresecret.eu
 
-declare -gr VERSION="Master V8.03.644.2025.06.07"
+declare -gr VERSION="Master V8.03.768.2025.06.09"
 
 ### VERY EARLY CHECK FOR DEBUGGING
 if [[ $* == *" --debug "* ]]; then

config/includes.chroot/preseed/preseed.cfg

@@ -112,4 +112,4 @@ d-i preseed/late_command string sh /preseed/.ash/3_di_preseed_late_command.sh
 
 # Please consider donating to my work at: https://coresecret.eu/spenden/
 ###########################################################################################
-# Written by: ./preseed_hash_generator.sh Version: Master V8.03.644.2025.06.07 at: 10:18:37.9542
+# Written by: ./preseed_hash_generator.sh Version: Master V8.03.768.2025.06.09 at: 10:18:37.9542

config/includes.chroot/root/.bashrc

@@ -33,6 +33,7 @@
 
 trap ' "${SHELL}" /root/.ciss/clean_logout.sh ' 0
 source /root/.ciss/alias
+source /root/.ciss/f2bchk.sh
 source /root/.ciss/shortcuts
 source /root/.ciss/scan_libwrap
 

config/includes.chroot/root/.ciss/alias

@@ -158,14 +158,22 @@ genpasswdhash() {
 # shellcheck disable=SC2317
 scurl() {
   if [[ $# -ne 2 ]]; then
-    printf "\e[91m❌ Error: Usage: scurl <URL> <path/to/file>. \e[0m\n" >&2
+    printf "\e[91m❌ Error: Usage: scurl <URL> <path/to/file>.\e[0m\n" >&2
     return 1
   fi
-
-  if ! curl --proto '=https' --tlsv1.3 -sSf -o "${2}" "${1}"; then
-    printf "\e[91m❌ Error: Download failed for URL: '%s'. \e[0m\n" "${1}" >&2
+  declare url="$1"
+  declare output_path="$2"
+  if ! curl --doh-url "https://dns01.eddns.eu/dns-query" \
+            --doh-cert-status \
+            --tlsv1.3 \
+            -sSf \
+            -o "${output_path}" \
+            "${url}"
+  then
+    printf "\e[91m❌ Error: Download failed for URL: '%s'.\e[0m\n" "${url}" >&2
     return 2
   fi
+  return 0
 }
 
 ###########################################################################################
@@ -177,14 +185,23 @@ scurl() {
 # shellcheck disable=SC2317
 swget() {
   if [[ $# -ne 2 ]]; then
-    printf "\e[91m❌ Error: Usage: swget <URL> <path/to/file>. \e[0m\n" >&2
+    printf "\e[91m❌ Error: Usage: swget <URL> <path/to/file>.\e[0m\n" >&2
     return 1
   fi
-
-  if ! wget --no-clobber --https-only --secure-protocol=TLSv1_3 -qO "${2}" "${1}"; then
-    printf "\e[91m❌ Error: Download failed for URL: '%s'. \e[0m\n" "${1}" >&2
+  declare url="$1"
+  declare output_path="$2"
+  mkdir -p "$(dirname "${output_path}")"
+  if ! wget --show-progress \
+            --no-clobber \
+            --https-only \
+            --secure-protocol=TLSv1_3 \
+            -qO "${output_path}" \
+            "${url}"
+  then
+    printf "\e[91m❌ Error: Download failed for URL: '%s'.\e[0m\n" "$url" >&2
     return 2
   fi
+  return 0
 }
 
 ###########################################################################################

config/includes.chroot/root/.ciss/f2bchk.sh

@@ -0,0 +1,87 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+
+#######################################
+# Wrapper for fail2ban filter checks against logs.
+# Usage: f2bchk --mode=ignored || --mode=matched  || --mode=missed \
+#               --filter=/etc/fail2ban/filter.d/ufw.aggressive.conf \
+#               --log=/var/log/ufw.log \
+#               --output=/tmp/f2bchk.log
+# Globals:
+#   DEFAULT_FILTER
+#   DEFAULT_LOG
+#   DEFAULT_MODE
+# Arguments:
+#  None
+# Returns:
+#   1 In case of any errors
+#######################################
+f2bchk(){
+  # Declare default values (readonly)
+  declare -r DEFAULT_MODE="matched"
+  declare -r DEFAULT_FILTER="/etc/fail2ban/filter.d/ufw.aggressive.conf"
+  declare -r DEFAULT_LOG="/var/log/ufw.log"
+
+  declare mode="${DEFAULT_MODE}"
+  declare filter="${DEFAULT_FILTER}"
+  declare log="${DEFAULT_LOG}"
+  declare output=""
+  declare arg=""
+
+  for arg in "$@"; do
+    case "${arg}" in
+      --mode=*)   mode="${arg#--mode=}";;
+      --filter=*) filter="${arg#--filter=}";;
+      --log=*)    log="${arg#--log=}";;
+      --output=*) output="${arg#--output=}";;
+      *)
+        printf "\e[31m[ERROR]\e[0m Unknown argument: %s\n" "${arg}"
+        return 1
+        ;;
+    esac
+  done
+
+  declare flag suffix
+  case "${mode}" in
+    ignored) flag="--print-all-ignored"; suffix="all.ignored";;
+    matched) flag="--print-all-matched"; suffix="all.matched";;
+    missed)  flag="--print-all-missed";  suffix="all.missed";;
+    *)
+      printf "\e[31m[ERROR]\e[0m Invalid mode: %s\n" "${mode}"
+      return 1
+      ;;
+  esac
+
+  if [[ -z "${output}" ]]; then
+    declare filter_name="${filter##*/}"
+    filter_name="${filter_name%.conf}"
+    output="/tmp/${filter_name}.${suffix}.log"
+  fi
+  if [[ ! -r "${log}" ]]; then
+    printf "\e[31m[ERROR]\e[0m Log file '%s' not found or not readable.\n" "${log}"
+    return 1
+  fi
+  if [[ ! -r "${filter}" ]]; then
+    printf "\e[31m[ERROR]\e[0m Filter file '%s' not found or not readable.\n" "${filter}"
+    return 1
+  fi
+
+  printf "\e[33m[INFO]\e[0m Running: fail2ban-regex %s %s %s\n" "${log}" "${filter}" "${flag}"
+  if fail2ban-regex "${log}" "${filter}" "${flag}" >| "${output}"; then
+    printf "\e[32m[SUCCESS]\e[0m Saved log to %s\n" "$output"
+    printf "You can view it with: cat %s\n" "$output"
+  else
+    printf "\e[31m[ERROR]\e[0m fail2ban-regex execution failed.\n"
+    return 1
+  fi
+}
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh