From 19a99b7d91491ee003a426bf7aae71b4cffa6d7f Mon Sep 17 00:00:00 2001
From: Tommy <contact@tommytran.io>
Date: Wed, 25 Jan 2023 06:18:44 -0500
Subject: [PATCH] Setup unbound

Signed-off-by: Tommy <contact@tommytran.io>
---
 install.sh | 74 ++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 64 insertions(+), 10 deletions(-)

diff --git a/install.sh b/install.sh
index d9c3803..6c575dd 100644
--- a/install.sh
+++ b/install.sh
@@ -186,9 +186,6 @@ EOF
 
     dnf install -y tuned
     tune-adm profile latency-performance
-
-    systemctl disable --now sshd.service
-    systemctl enable --now sshd.socket
 }
 
 install_pterodactyl() {
@@ -572,15 +569,76 @@ ssl_certs(){
 }
 
 linux_hardening(){
+
+    dnf install -y unbound
+
+    echo 'server:
+  chroot: ""
+  auto-trust-anchor-file: "/var/lib/unbound/root.key"
+  trust-anchor-signaling: yes
+  root-key-sentinel: yes
+  tls-ciphers: "PROFILE=SYSTEM"
+  hide-http-user-agent: yes
+  hide-identity: yes
+  hide-trustanchor: yes
+  hide-version: yes
+  deny-any: yes
+  do-not-query-localhost: yes
+  harden-algo-downgrade: yes
+  harden-large-queries: yes
+  harden-referral-path: yes
+  ignore-cd-flag: yes
+  max-udp-size: 3072
+  module-config: "validator iterator"
+  qname-minimisation-strict: yes
+  unwanted-reply-threshold: 10000000
+  use-caps-for-id: yes
+  outgoing-port-permit: 1024-65535
+  prefetch: yes
+  prefetch-key: yes
+forward-zone:
+  name: "."
+  forward-tls-upstream: yes
+  forward-addr: 8.8.8.8#dns.google
+  forward-addr: 8.8.4.4#dns.google
+  forward-addr: 2001:4860:4860::8888#dns.google
+  forward-addr: 2001:4860:4860::8844#dns.google' | sudo tee /etc/unbound/unbound.conf
+  
+    mkdir -p /etc/systemd/system/unbound.service.d
+    echo $'[Service]
+MemoryDenyWriteExecute=true
+PrivateDevices=true
+PrivateTmp=true
+ProtectHome=true
+ProtectClock=true
+ProtectControlGroups=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+# This breaks using socket options like \'so-rcvbuf\'. Explicitly disable for visibility.
+ProtectKernelTunables=true
+ProtectProc=invisible
+RestrictAddressFamilies=AF_INET AF_INET6 AF_NETLINK AF_UNIX
+RestrictRealtime=true
+SystemCallArchitectures=native
+SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module mount @obsolete @resources
+RestrictNamespaces=yes
+LockPersonality=yes' | sudo tee /etc/systemd/system/unbound.service.d/override.conf
+
+    systemctl enable --now unbound
+
+    mkdir -p /etc/systemd/system/sshd.service.d
+    curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/limits.conf -o /etc/systemd/system/sshd.service.d/limits.conf
+    systemctl restart sshd
+
+    curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/chrony.conf -o /etc/chrony.conf
+    systemctl restart chronyd
+
     curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/modprobe.d/30_security-misc.conf -o /etc/modprobe.d/30_security-misc.conf
     curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/sysctl.d/30_security-misc.conf -o /etc/sysctl.d/30_security-misc.conf
     sed -i 's/kernel.yama.ptrace_scope=2/kernel.yama.ptrace_scope=3/g' /etc/sysctl.d/30_security-misc.conf
     curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/sysctl.d/30_silent-kernel-printk.conf -o /etc/sysctl.d/30_silent-kernel-printk.conf
     sysctl -p
 
-    curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/chrony.conf -o /etc/chrony.conf
-    systemctl restart chronyd
-
     mkdir -p /etc/systemd/system/NetworkManager.service.d
     curl https://gitlab.com/divested/brace/-/raw/master/brace/usr/lib/systemd/system/NetworkManager.service.d/99-brace.conf -o /etc/systemd/system/NetworkManager.service.d/99-brace.conf
     systemctl restart NetworkManager
@@ -589,10 +647,6 @@ linux_hardening(){
     curl https://gitlab.com/divested/brace/-/raw/master/brace/usr/lib/systemd/system/irqbalance.service.d/99-brace.conf -o /etc/systemd/system/irqbalance.service.d/99-brace.conf
     systemctl restart irqbalance
 
-    mkdir -p /etc/systemd/system/sshd.service.d
-    curl https://raw.githubusercontent.com/GrapheneOS/infrastructure/main/systemd/system/sshd.service.d/limits.conf -o /etc/systemd/system/sshd.service.d/limits.conf
-    systemctl restart sshd
-
     if [ "$lsb_dist" = "rhel" ]; then
         insights-client --register
         dnf install -y yara