Sysctl : Migrate to nix.
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@ -40,6 +40,61 @@
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boot.loader.systemd-boot.enable = true;
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boot.loader.efi.canTouchEfiVariables = true;
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# Sysctl.
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boot.kernel.sysctl = {
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# Spoof protection.
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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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# Packet forwarding.
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"net.ipv4.ip_forward" = 1;
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# "net.ipv6.conf.all.forwarding" = 1;
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# MITM protection.
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"net.ipv4.conf.all.accept_redirects" = 0;
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"net.ipv6.conf.all.accept_redirects" = 0;
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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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"net.ipv6.conf.all.accept_source_route" = 0;
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# Allow sysrq.
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"kernel.sysrq" = 1;
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# Protect filesystem links.
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# "fs.protected_hardlinks" = 0;
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# "fs.protected_symlinks" = 0;
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# Specify ttl.
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"net.ipv4.ip_default_ttl" = 65;
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# Lynis config.
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"kernel.core_uses_pid" = 1;
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"kernel.kptr_restrict" = 2;
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# IP hardening.
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"net.ipv4.conf.all.log_martians" = 1;
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"net.ipv4.conf.default.accept_redirects" = 0;
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"net.ipv4.conf.default.accept_source_route" = 0;
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"net.ipv4.conf.default.log_martians" = 0;
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"net.ipv4.tcp_timestamps" = 0;
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"net.ipv6.conf.default.accept_redirects" = 0;
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# Increase file watchers.
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"fs.inotify.max_user_instances" = 999999;
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"fs.inotify.max_user_watches" = 999999;
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"fs.inotify.max_user_event" = 999999;
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# Disable ipv6.
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"net.ipv6.conf.all.disable_ipv6" = 1;
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"net.ipv6.conf.default.disable_ipv6" = 1;
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"net.ipv6.conf.lo.disable_ipv6" = 1;
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"net.ipv6.conf.eth0.disable_ipv6" = 1;
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};
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# Network.
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networking.networkmanager.enable = true;
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@ -1,96 +0,0 @@
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#
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# /etc/sysctl.conf - Configuration file for setting system variables
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# See /etc/sysctl.d/ for additional system variables.
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# See sysctl.conf (5) for information.
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#
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#kernel.domainname = example.com
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# Uncomment the following to stop low-level messages on console
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#kernel.printk = 3 4 1 3
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##############################################################3
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# Functions previously found in netbase
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#
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# Uncomment the next two lines to 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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# Uncomment the next line to enable TCP/IP SYN cookies
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# See http://lwn.net/Articles/277146/
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# Note: This may impact IPv6 TCP sessions too
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#net.ipv4.tcp_syncookies=1
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# Uncomment the next line to enable packet forwarding for IPv4
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net.ipv4.ip_forward=1
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# Uncomment the next line to enable packet forwarding for IPv6
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# Enabling this option disables Stateless Address Autoconfiguration
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# based on Router Advertisements for this host
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#net.ipv6.conf.all.forwarding=1
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###################################################################
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# Additional settings - these settings can improve the network
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# security of the host and prevent against some network attacks
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# including spoofing attacks and man in the middle attacks through
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# redirection. Some network environments, however, require that these
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# settings are disabled so review and enable them as needed.
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#
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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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net.ipv6.conf.all.accept_redirects = 0
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# _or_
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# Accept ICMP redirects only for gateways listed in our default
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# gateway list (enabled by default)
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# net.ipv4.conf.all.secure_redirects = 1
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#
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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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#
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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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net.ipv6.conf.all.accept_source_route = 0
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#
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# Log Martian Packets
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#net.ipv4.conf.all.log_martians = 1
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#
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###################################################################
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# Magic system request Key
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# 0=disable, 1=enable all
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# Debian kernels have this set to 0 (disable the key)
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# See https://www.kernel.org/doc/Documentation/sysrq.txt
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# for what other values do
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kernel.sysrq=1
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###################################################################
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# Protected links
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#
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# Protects against creating or following links under certain conditions
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# Debian kernels have both set to 1 (restricted)
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# See https://www.kernel.org/doc/Documentation/sysctl/fs.txt
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#fs.protected_hardlinks=0
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#fs.protected_symlinks=0
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net.ipv4.ip_default_ttl=65
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#lynis
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kernel.core_uses_pid=1
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kernel.kptr_restrict=2
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net.ipv4.conf.all.log_martians=1
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net.ipv4.conf.default.accept_redirects=0
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net.ipv4.conf.default.accept_source_route=0
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net.ipv4.conf.default.log_martians=0
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net.ipv4.tcp_timestamps=0
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net.ipv6.conf.default.accept_redirects=0
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fs.inotify.max_user_instances=999999
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fs.inotify.max_user_watches=999999
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fs.inotify.max_user_event=999999
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net.ipv6.conf.all.disable_ipv6=1
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net.ipv6.conf.default.disable_ipv6=1
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net.ipv6.conf.lo.disable_ipv6=1
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net.ipv6.conf.eth0.disable_ipv6=1
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