Tomster/Linux-Setup-Scripts
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2
Fedora-Server-40.sh
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@ -110,8 +110,6 @@ sudo dnf remove -y cockpit*
# Install hardened_malloc
sudo dnf copr enable secureblue/hardened_malloc -y
sudo dnf install -y hardened_malloc
echo 'libhardened_malloc.so' | sudo tee /etc/ld.so.preload
sudo chmod 644 /etc/ld.so.preload
# Install appropriate virtualization drivers
if [ "$virtualization" = 'kvm' ]; then

2
Fedora-Workstation-40.sh
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@ -176,8 +176,6 @@ sudo dnf -y upgrade
# Install hardened_malloc
sudo dnf copr enable secureblue/hardened_malloc -y
sudo dnf install -y hardened_malloc
echo 'libhardened_malloc.so' | sudo tee /etc/ld.so.preload
sudo chmod 644 /etc/ld.so.preload
# Install packages that I use
sudo dnf -y install adw-gtk3-theme gnome-console gnome-shell-extension-appindicator gnome-shell-extension-blur-my-shell gnome-shell-extension-background-logo

44
etc/sysctl.d/99-server.conf
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@ -3,30 +3,30 @@
dev.tty.ldisc_autoload = 0
# https://access.redhat.com/solutions/1985633
# Seems dangerous.
# Seems dangerous
fs.binfmt_misc.status = 0
# https://madaidans-insecurities.github.io/guides/linux-hardening.html#sysctl-userspace
# Enable fs.protected sysctls.
# Enable fs.protected sysctls
fs.protected_regular = 2
fs.protected_fifos = 2
fs.protected_symlinks = 1
fs.protected_hardlinks = 1
# https://madaidans-insecurities.github.io/guides/linux-hardening.html#core-dumps
# Disable coredumps.
# Disable coredumps
# For additional safety, disable coredumps using ulimit and systemd too.
kernel.core_pattern=|/bin/false
fs.suid_dumpable = 0
# Restrict dmesg to CAP_SYS_LOG.
# Restrict dmesg to CAP_SYS_LOG
# https://www.kernel.org/doc/Documentation/sysctl/kernel.txt
kernel.dmesg_restrict = 1
# https://www.kernel.org/doc/Documentation/sysctl/kernel.txt
# https://madaidans-insecurities.github.io/guides/linux-hardening.html#sysctl-kernel
# https://kernsec.org/wiki/index.php/Bug_Classes/Kernel_pointer_leak
# Restrict access to /proc.
# Restrict access to /proc
kernel.kptr_restrict = 2
# Not needed, I don't do livepatching and reboot regularly.
@ -38,10 +38,10 @@ kernel.kexec_load_disabled = 1
kernel.unprivileged_bpf_disabled = 1
net.core.bpf_jit_harden = 2
# Docker running as root do not require unpriv user ns, which is dangerous, so we disabe it.
# Docker running as root do not require unpriv user ns, which is dangerous, so we disabe it
kernel.unprivileged_userns_clone = 0
# Needed for gVisor, which is used on almost all of my servers.
# Needed for gVisor, which is used on almost all of my servers
kernel.yama.ptrace_scope = 1
# https://madaidans-insecurities.github.io/guides/linux-hardening.html#sysctl
@ -57,60 +57,60 @@ kernel.perf_event_paranoid = 4
kernel_io_uring_disable = 2
# https://madaidans-insecurities.github.io/guides/linux-hardening.html#sysctl-kernel
# Disable sysrq.
# Disable sysrq
kernel.sysrq = 0
# https://www.stigviewer.com/stig/red_hat_enterprise_linux_6/2020-09-03/finding/V-217911
# Not running a router here, so no redirects.
# Not running a router here, so no redirects
net.ipv4.conf.*.send_redirects = 0
net.ipv4.conf.*.accept_redirects = 0
net.ipv6.conf.*.accept_redirects = 0
# Check if the source of the IP address is reachable through the same interface it came in.
# Basic IP spoofing mitigation.
# Check if the source of the IP address is reachable through the same interface it came in
# Basic IP spoofing mitigation
net.ipv4.conf.*.rp_filter = 1
# Respond to ICMP
net.ipv4.icmp_echo_ignore_all = 0
net.ipv6.icmp.echo_ignore_all = 0
# Ignore Bogus ICMP responses.
# Ignore Bogus ICMP responses
net.ipv4.icmp_ignore_bogus_error_responses = 1
# Enable IP Forwarding.
# Enable IP Forwarding
# Almost all of my servers run Docker anyways, and Docker absolutely requires this.
net.ipv4.ip_forward = 1
net.ipv6.conf.all.forwarding = 1
# https://www.stigviewer.com/stig/red_hat_enterprise_linux_6/2016-06-05/finding/V-38537
# Ignore bogus icmp response.
# Ignore bogus icmp response
net.ipv4.icmp_ignore_bogus_error_responses = 1
# Protection against time-wait assasination attacks.
# Protection against time-wait assasination attacks
net.ipv4.tcp_rfc1337 = 1
# Enable SYN cookies.
# Basic SYN flood mitigation.
# Enable SYN cookies
# Basic SYN flood mitigation
net.ipv4.tcp_syncookies = 1
# https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf
# Make sure TCP timestamp is enabled.
# Make sure TCP timestamp is enabled
net.ipv4.tcp_timestamps = 1
# https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf
# Disable TCP SACK.
# Disable TCP SACK
# We have good networking :)
net.ipv4.tcp_sack = 0
# No SACK, therefore no Duplicated SACK.
# No SACK, therefore no Duplicated SACK
net.ipv4.tcp_dsack = 0
# Improve ALSR effectiveness for mmap.
# Improve ALSR effectiveness for mmap
vm.mmap_rnd_bits = 32
vm.mmap_rnd_compat_bits = 16
# https://madaidans-insecurities.github.io/guides/linux-hardening.html#sysctl-kernel
# Restrict userfaultfd to CAP_SYS_PTRACE.
# Restrict userfaultfd to CAP_SYS_PTRACE
# https://bugs.archlinux.org/task/62780
# Interestingly enough, Arch does not even have userfaultfd in their kernel, so it is
# probably not used in the real world at all.

40
etc/sysctl.d/99-workstation.conf
View File

@ -4,11 +4,11 @@ dev.tty.ldisc_autoload = 0
# https://access.redhat.com/solutions/1985633
# Seems dangerous.
# Roseta need this though, so if you use it change it to 1.
# Roseta need this though, so if you use it change it to 1
fs.binfmt_misc.status = 0
# https://madaidans-insecurities.github.io/guides/linux-hardening.html#sysctl-userspace
# Enable fs.protected sysctls.
# Enable fs.protected sysctls
fs.protected_regular = 2
fs.protected_fifos = 2
fs.protected_symlinks = 1
@ -20,14 +20,14 @@ fs.protected_hardlinks = 1
kernel.core_pattern=|/bin/false
fs.suid_dumpable = 0
# Restrict dmesg to CAP_SYS_LOG.
# Restrict dmesg to CAP_SYS_LOG
# https://www.kernel.org/doc/Documentation/sysctl/kernel.txt
kernel.dmesg_restrict = 1
# https://www.kernel.org/doc/Documentation/sysctl/kernel.txt
# https://madaidans-insecurities.github.io/guides/linux-hardening.html#sysctl-kernel
# https://kernsec.org/wiki/index.php/Bug_Classes/Kernel_pointer_leak
# Restrict access to /proc.
# Restrict access to /proc
kernel.kptr_restrict = 2
# Not needed, I don't do livepatching and reboot regularly.
@ -39,7 +39,7 @@ kernel.kexec_load_disabled = 1
kernel.unprivileged_bpf_disabled = 1
net.core.bpf_jit_harden = 2
# Needed for Flatpak and Bubblewrap.
# Needed for Flatpak and Bubblewrap
kernel.unprivileged_userns_clone = 1
# Disable ptrace. Not needed on workstations.
@ -56,60 +56,60 @@ kernel.perf_event_paranoid = 4
kernel_io_uring_disable = 2
# https://madaidans-insecurities.github.io/guides/linux-hardening.html#sysctl-kernel
# Disable sysrq.
# Disable sysrq
kernel.sysrq = 0
# https://www.stigviewer.com/stig/red_hat_enterprise_linux_6/2020-09-03/finding/V-217911
# Not running a router here, so no redirects.
# Not running a router here, so no redirects
net.ipv4.conf.*.send_redirects = 0
net.ipv4.conf.*.accept_redirects = 0
net.ipv6.conf.*.accept_redirects = 0
# Check if the source of the IP address is reachable through the same interface it came in
# Basic IP spoofing mitigation.
# Basic IP spoofing mitigation
net.ipv4.conf.*.rp_filter = 1
# Do not respond to ICMP.
# Do not respond to ICMP
net.ipv4.icmp_echo_ignore_all = 1
net.ipv6.icmp.echo_ignore_all = 1
# Ignore Bogus ICMP responses.
# Ignore Bogus ICMP responses
net.ipv4.icmp_ignore_bogus_error_responses = 1
# Enable IP Forwarding.
# Enable IP Forwarding
# Needed for VM networking and whatnot.
net.ipv4.ip_forward = 1
net.ipv6.conf.all.forwarding = 1
# https://www.stigviewer.com/stig/red_hat_enterprise_linux_6/2016-06-05/finding/V-38537
# Ignore bogus icmp response.
# Ignore bogus icmp response
net.ipv4.icmp_ignore_bogus_error_responses = 1
# Protection against time-wait assasination attacks.
# Protection against time-wait assasination attacks
net.ipv4.tcp_rfc1337 = 1
# Enable SYN cookies.
# Basic SYN flood mitigation.
# Enable SYN cookies
# Basic SYN flood mitigation
net.ipv4.tcp_syncookies = 1
# https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf
# Make sure TCP timestamp is enabled.
# Make sure TCP timestamp is enabled
net.ipv4.tcp_timestamps = 1
# https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf
# Disable TCP SACK.
# Disable TCP SACK
# We have good networking :)
net.ipv4.tcp_sack = 0
# No SACK, therefore no Duplicated SACK.
# No SACK, therefore no Duplicated SACK
net.ipv4.tcp_dsack = 0
# Improve ALSR effectiveness for mmap.
# Improve ALSR effectiveness for mmap
vm.mmap_rnd_bits = 32
vm.mmap_rnd_compat_bits = 16
# https://madaidans-insecurities.github.io/guides/linux-hardening.html#sysctl-kernel
# Restrict userfaultfd to CAP_SYS_PTRACE.
# Restrict userfaultfd to CAP_SYS_PTRACE
# https://bugs.archlinux.org/task/62780
# Interestingly enough, Arch does not even have userfaultfd in their kernel, so it is
# probably not used in the real world at all.