Adolfo Delorenzo
efc7f80b65
Security hardening: bind kubeconfig server to localhost, mount hardening (noexec/nosuid/nodev on tmpfs), sysctl network hardening, kernel module loading lock after boot, SHA256 checksum verification for downloads, kernel AppArmor + Audit support, complain-mode AppArmor profiles for containerd and kubelet, and security integration test. ARM64 Raspberry Pi support: piCore64 base extraction, RPi kernel build from raspberrypi/linux fork, RPi firmware fetch, SD card image with 4- partition GPT and tryboot A/B mechanism, BootEnv Go interface abstracting GRUB vs RPi boot environments, architecture-aware build scripts, QEMU aarch64 dev VM and boot test. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
28 lines
942 B
Plaintext
28 lines
942 B
Plaintext
# Security hardening — applied automatically by 40-sysctl.sh
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# Network: anti-spoofing
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net.ipv4.conf.all.rp_filter = 1
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net.ipv4.conf.default.rp_filter = 1
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# Network: SYN flood protection
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net.ipv4.tcp_syncookies = 1
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# Network: ICMP hardening
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net.ipv4.conf.all.accept_redirects = 0
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net.ipv4.conf.default.accept_redirects = 0
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net.ipv4.conf.all.send_redirects = 0
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net.ipv4.conf.default.send_redirects = 0
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net.ipv4.icmp_echo_ignore_broadcasts = 1
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net.ipv4.icmp_ignore_bogus_error_responses = 1
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net.ipv4.conf.all.log_martians = 1
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# Network: IPv6 hardening
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net.ipv6.conf.all.accept_redirects = 0
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net.ipv6.conf.default.accept_redirects = 0
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net.ipv6.conf.all.accept_ra = 0
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# Network: source routing
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net.ipv4.conf.all.accept_source_route = 0
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net.ipv4.conf.default.accept_source_route = 0
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# Kernel: information disclosure
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kernel.kptr_restrict = 2
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kernel.dmesg_restrict = 1
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kernel.perf_event_paranoid = 3
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# Kernel: core dump safety
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fs.suid_dumpable = 0
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