dot-files/sysctl/etc/sysctl.conf

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# Hardened sysctl conf
fs.protected_regular = 2
fs.protected_fifos = 2
fs.protected_hardlinks = 1
fs.protected_symlinks = 1
fs.suid_dumpable = 0
kernel.core_uses_pid = 1
kernel.ctrl-alt-del = 0
kernel.dmesg_restrict = 1
kernel.kptr_restrict = 2
kernel.randomize_va_space = 2
kernel.sysrq = 0
kernel.unprivileged_bpf_disabled = 1
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.bootp_relay = 0
net.ipv4.conf.all.forwarding = 0
net.ipv4.conf.all.log_martians = 1
net.ipv4.conf.all.mc_forwarding = 0
net.ipv4.conf.all.proxy_arp = 0
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.all.secure_redirects=0
net.ipv4.tcp_rfc1337=1
net.ipv4.tcp_sack=0
net.ipv4.tcp_dsack=0
net.ipv4.tcp_fack=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.send_redirects=0
net.ipv4.conf.default.secure_redirects=0
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_timestamps = 1
dev.tty.ldisc_autoload=0
vm.unprivileged_userfaultfd=0
kernel.kexec_load_disabled=1
kernel.perf_event_paranoid=2
kernel.yama.ptrace_scope=2
vm.mmap_rnd_bits=32
vm.mmap_rnd_compat_bits=16
# Uncomment do disable ipv6
#net.ipv6.conf.all.disable_ipv6=1
#net.ipv6.conf.default.disable_ipv6=1
#net.ipv6.conf.lo.disable_ipv6=1
net.ipv6.conf.all.accept_redirects = 0
net.ipv6.conf.all.accept_source_route = 0
net.ipv6.conf.default.accept_redirects = 0
net.ipv6.conf.default.accept_source_route = 0
vm.swappiness = 15