mirror of
https://github.com/nmasur/dotfiles
synced 2024-11-25 10:15:37 +00:00
76 lines
2.4 KiB
Nix
76 lines
2.4 KiB
Nix
|
{ lib, pkgs, ... }:
|
||
|
|
|
||
|
|
# Currently has some issues that don't make this viable.
|
||
|
|
|
||
|
|
# Taken from:
|
||
|
|
# https://dataswamp.org/~solene/2022-09-29-iblock-implemented-in-nixos.html
|
||
|
|
|
||
|
|
# You will need to flush all rules when removing:
|
||
|
|
# https://serverfault.com/questions/200635/best-way-to-clear-all-iptables-rules
|
||
|
|
|
||
|
|
let
|
||
|
|
|
||
|
|
portsToBlock = [ 25545 25565 25570 ];
|
||
|
|
portsString =
|
||
|
|
builtins.concatStringsSep "," (builtins.map builtins.toString portsToBlock);
|
||
|
|
|
||
|
|
# Block IPs for 20 days
|
||
|
|
expire = 60 * 60 * 24 * 20;
|
||
|
|
|
||
|
|
rules = table: [
|
||
|
|
"INPUT -i eth0 -p tcp -m multiport --dports ${portsString} -m state --state NEW -m recent --set"
|
||
|
|
"INPUT -i eth0 -p tcp -m multiport --dports ${portsString} -m state --state NEW -m recent --update --seconds 10 --hitcount 1 -j SET --add-set ${table} src"
|
||
|
|
"INPUT -i eth0 -p tcp -m set --match-set ${table} src -j nixos-fw-refuse"
|
||
|
|
"INPUT -i eth0 -p udp -m set --match-set ${table} src -j nixos-fw-refuse"
|
||
|
|
];
|
||
|
|
|
||
|
|
create-rules = lib.concatStringsSep "\n"
|
||
|
|
(builtins.map (rule: "iptables -C " + rule + " || iptables -A " + rule)
|
||
|
|
(rules "blocked") ++ builtins.map
|
||
|
|
(rule: "ip6tables -C " + rule + " || ip6tables -A " + rule)
|
||
|
|
(rules "blocked6"));
|
||
|
|
|
||
|
|
delete-rules = lib.concatStringsSep "\n"
|
||
|
|
(builtins.map (rule: "iptables -C " + rule + " && iptables -D " + rule)
|
||
|
|
(rules "blocked") ++ builtins.map
|
||
|
|
(rule: "ip6tables -C " + rule + " && ip6tables -D " + rule)
|
||
|
|
(rules "blocked6"));
|
||
|
|
|
||
|
|
in {
|
||
|
|
|
||
|
|
networking.firewall = {
|
||
|
|
|
||
|
|
extraPackages = [ pkgs.ipset ];
|
||
|
|
# allowedTCPPorts = portsToBlock;
|
||
|
|
|
||
|
|
# Restore ban list when starting up
|
||
|
|
extraCommands = ''
|
||
|
|
if test -f /var/lib/ipset.conf
|
||
|
|
then
|
||
|
|
ipset restore -! < /var/lib/ipset.conf
|
||
|
|
else
|
||
|
|
ipset -exist create blocked hash:ip ${
|
||
|
|
if expire > 0 then "timeout ${toString expire}" else ""
|
||
|
|
}
|
||
|
|
ipset -exist create blocked6 hash:ip family inet6 ${
|
||
|
|
if expire > 0 then "timeout ${toString expire}" else ""
|
||
|
|
}
|
||
|
|
fi
|
||
|
|
${create-rules}
|
||
|
|
'';
|
||
|
|
|
||
|
|
# Save list when shutting down
|
||
|
|
extraStopCommands = ''
|
||
|
|
ipset -exist create blocked hash:ip ${
|
||
|
|
if expire > 0 then "timeout ${toString expire}" else ""
|
||
|
|
}
|
||
|
|
ipset -exist create blocked6 hash:ip family inet6 ${
|
||
|
|
if expire > 0 then "timeout ${toString expire}" else ""
|
||
|
|
}
|
||
|
|
ipset save > /var/lib/ipset.conf
|
||
|
|
${delete-rules}
|
||
|
|
'';
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|