# ----------------------------
# Kernel hardening baseline
# ----------------------------

# Kernel pointer & info leaks
kernel.kptr_restrict = 2
kernel.dmesg_restrict = 1
kernel.perf_event_paranoid = 3

# Protect against memory corruption exploits
kernel.randomize_va_space = 2
vm.mmap_min_addr = 65536

# Disable magic SysRq
kernel.sysrq = 0

# Restrict kernel logs
kernel.printk = 3 3 3 3

# Protect links & proc
fs.protected_hardlinks = 1
fs.protected_symlinks = 1
fs.protected_fifos = 2
fs.protected_regular = 2

# Disable unprivileged user namespaces (major exploit class)
kernel.unprivileged_userns_clone = 0

# Block ptrace attacks
kernel.yama.ptrace_scope = 2

# Networking hardening
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.all.log_martians = 1
net.ipv4.conf.default.log_martians = 1
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.ipv4.tcp_syncookies = 1

# NAT compatibility
net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.default.rp_filter = 0
net.ipv4.conf.enx00e04c2e4828.rp_filter = 0

# Disable unprivileged BPF
kernel.unprivileged_bpf_disabled = 1

# Restrict kernel tracing
kernel.ftrace_enabled = 0