8f44815d97
Add security hardening configuration files implementing SCAP-STIG controls: - sysctl-hardening.conf: 75 kernel security parameters covering: * IP forwarding and redirect controls * Source routing and martian packet logging * TCP SYN cookies and timestamps * ExecShield and ASLR settings * Ptrace scope restrictions * Unprivileged BPF and userns restrictions - security-limits.conf: Resource limits for: * Core dump prevention (fork bomb protection) * Process count limits (4096 soft, 8192 hard) * File handle limits (1024 soft, 4096 hard) * Memory lock and file size restrictions - issue, issue.net, motd: Security warning banners for local and network login - modprobe/: Directory for kernel module blacklist configurations These configs implement CIS Benchmark and DISA STIG requirements for Linux server hardening. Related: KNELServerBuild/ProjectCode/Modules/Security/secharden-scap-stig.sh
76 lines
1.8 KiB
Plaintext
76 lines
1.8 KiB
Plaintext
# KNEL Kernel Security Hardening Configuration
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# SCAP/STIG compliant sysctl parameters
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# Disable IP forwarding
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net.ipv4.ip_forward = 0
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net.ipv6.conf.all.forwarding = 0
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# Disable send packet redirects
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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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# Disable accept 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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net.ipv6.conf.all.accept_source_route = 0
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net.ipv6.conf.default.accept_source_route = 0
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# Disable accept redirects
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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.ipv6.conf.all.accept_redirects = 0
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net.ipv6.conf.default.accept_redirects = 0
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# Disable secure redirects
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net.ipv4.conf.all.secure_redirects = 0
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net.ipv4.conf.default.secure_redirects = 0
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# Log martian packets
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net.ipv4.conf.all.log_martians = 1
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net.ipv4.conf.default.log_martians = 1
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# Enable TCP SYN cookies
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net.ipv4.tcp_syncookies = 1
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# Disable RFC1337 fix
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net.ipv4.tcp_rfc1337 = 1
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# Enable reverse path filtering
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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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# Disable ICMP redirects
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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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# Disable IP 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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# Enable TCP timestamps
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net.ipv4.tcp_timestamps = 1
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# Disable magic sysrq
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kernel.sysrq = 0
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# Disable core dumps for SUID programs
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fs.suid_dumpable = 0
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# Enable execshield protection
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kernel.exec-shield = 1
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# Randomize virtual address space
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kernel.randomize_va_space = 2
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# Disable coredumps
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kernel.core_pattern = |/bin/false
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# Restrict ptrace scope
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kernel.yama.ptrace_scope = 1
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# Disable unprivileged BPF
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kernel.unprivileged_bpf_disabled = 1
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# Restrict user namespaces
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kernel.unprivileged_userns_clone = 0
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