2023-09-01 15:42:20 -04:00
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# General sysctl parameters for PVC hypervisors
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2023-09-01 15:42:19 -04:00
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# {{ ansible_managed }}
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# Reduce swappiness
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vm.swappiness = 1
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# enable Spoof protection (reverse-path filter)
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# Turn on Source Address Verification in all interfaces to
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# prevent some spoofing attacks
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net.ipv4.conf.default.rp_filter = 1
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net.ipv4.conf.all.rp_filter = 1
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# Ignore ICMP broadcasts
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net.ipv4.icmp_echo_ignore_broadcasts = 1
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# Ignore bogus ICMP errors
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net.ipv4.icmp_ignore_bogus_error_responses = 1
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# Do not accept ICMP redirects (prevent MITM attacks)
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net.ipv4.conf.all.accept_redirects = 0
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{% if not 'rpi' in group_names %}
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net.ipv6.conf.all.accept_redirects = 0
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{% endif %}
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# Do not send ICMP redirects (we are not a router)
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net.ipv4.conf.all.send_redirects = 0
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# Do not accept IP source route packets (we are not a router)
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net.ipv4.conf.all.accept_source_route = 0
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{% if not 'rpi' in group_names %}
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net.ipv6.conf.all.accept_source_route = 0
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{% endif %}
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# Don't log Martian Packets
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net.ipv4.conf.all.log_martians = 0
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# Explicit Congestion Notification (ECN)
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net.ipv4.tcp_ecn = 1
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# number of seconds the kernel waits before rebooting on a panic
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kernel.panic = 60
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# Panic on an OOPS
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kernel.panic_on_oops = 1
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# Restrict dmesg
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kernel.dmesg_restrict = 1
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