sysctl.conf

# https://github.com/drduh/config/blob/master/sysctl.conf
# https://sysctl-explorer.net/
#kernel.modules_disabled = 1
#net.ipv4.ip_forward = 1
#user.max_user_namespaces = 0
dev.tty.ldisc_autoload = 0
dev.tty.legacy_tiocsti = 0
fs.protected_fifos = 2
fs.protected_hardlinks = 1
fs.protected_regular = 2
fs.protected_symlinks = 1
fs.suid_dumpable = 0
kernel.core_uses_pid = 1
kernel.dmesg_restrict = 1
kernel.kexec_load_disabled = 1
kernel.kptr_restrict = 2
kernel.perf_event_paranoid = 3
kernel.printk = 3 3 3 3
kernel.randomize_va_space = 2
kernel.sysrq = 4
kernel.unprivileged_bpf_disabled = 1
kernel.unprivileged_userns_clone = 0
kernel.yama.ptrace_scope = 3
net.core.bpf_jit_harden = 2
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.all.log_martians = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.all.shared_media = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.default.log_martians = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.secure_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.default.shared_media = 0
net.ipv4.icmp_echo_ignore_all = 1
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.ipv4.tcp_dsack = 0
net.ipv4.tcp_rfc1337 = 1
net.ipv4.tcp_sack = 0
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_timestamps = 0
net.ipv6.conf.all.accept_ra = 0
net.ipv6.conf.all.accept_redirects = 0
net.ipv6.conf.all.accept_source_route = 0
net.ipv6.conf.all.forwarding = 0
net.ipv6.conf.all.use_tempaddr = 2
net.ipv6.conf.default.accept_ra = 0
net.ipv6.conf.default.accept_ra_defrtr = 0
net.ipv6.conf.default.accept_ra_pinfo = 0
net.ipv6.conf.default.accept_ra_rtr_pref = 0
net.ipv6.conf.default.accept_redirects = 0
net.ipv6.conf.default.accept_source_route = 0
net.ipv6.conf.default.autoconf = 0
net.ipv6.conf.default.dad_transmits = 0
net.ipv6.conf.default.max_addresses = 1
net.ipv6.conf.default.router_solicitations = 0
net.ipv6.conf.default.use_tempaddr = 2
net.ipv6.conf.eth0.accept_ra_rtr_pref = 0
vm.unprivileged_userfaultfd = 0