diff options
| -rw-r--r-- | modules/cd/default.nix | 17 | ||||
| -rw-r--r-- | modules/cd/iptables.nix | 76 | ||||
| -rw-r--r-- | modules/mkdir/default.nix | 17 | ||||
| -rw-r--r-- | modules/mkdir/iptables.nix | 76 | ||||
| -rw-r--r-- | modules/rmdir/default.nix | 17 | ||||
| -rw-r--r-- | modules/rmdir/iptables.nix | 76 | ||||
| -rw-r--r-- | modules/tv/iptables/config.nix | 93 | ||||
| -rw-r--r-- | modules/tv/iptables/default.nix | 11 | ||||
| -rw-r--r-- | modules/tv/iptables/options.nix | 29 | ||||
| -rw-r--r-- | modules/wu/default.nix | 13 | ||||
| -rw-r--r-- | modules/wu/iptables.nix | 69 |
11 files changed, 193 insertions, 301 deletions
diff --git a/modules/cd/default.nix b/modules/cd/default.nix index 6884c67..21d9565 100644 --- a/modules/cd/default.nix +++ b/modules/cd/default.nix @@ -8,7 +8,6 @@ in imports = [ <secrets/hashedPasswords.nix> - ./iptables.nix ./networking.nix ./users.nix ../common/nixpkgs.nix @@ -19,6 +18,22 @@ in ../tv/git/public.nix ../tv/retiolum.nix ../tv/sanitize.nix + { + imports = [ ../tv/iptables ]; + tv.iptables = { + enable = true; + input-internet-accept-new-tcp = [ + "ssh" + "tinc" + "smtp" + "xmpp-client" + "xmpp-server" + ]; + input-retiolum-accept-new-tcp = [ + "http" + ]; + }; + } ]; # "Developer 2" plan has two vCPUs. diff --git a/modules/cd/iptables.nix b/modules/cd/iptables.nix deleted file mode 100644 index 950aa84..0000000 --- a/modules/cd/iptables.nix +++ /dev/null @@ -1,76 +0,0 @@ -{ config, pkgs, ... }: - -{ - # - # iptables - # - networking.firewall.enable = false; - system.activationScripts.iptables = - let - log = false; - when = c: f: if c then f else ""; - in - '' - ip4tables() { ${pkgs.iptables}/sbin/iptables "$@"; } - ip6tables() { ${pkgs.iptables}/sbin/ip6tables "$@"; } - ipXtables() { ip4tables "$@" && ip6tables "$@"; } - - # XXX This fails with the original CAC CentOS 7 kernel. - if ipXtables -vL >/dev/null; then - - # - # nat - # - - # reset tables - ipXtables -t nat -F - ipXtables -t nat -X - - # - ipXtables -t nat -A PREROUTING -j REDIRECT ! -i retiolum -p tcp --dport ssh --to-ports 0 - ipXtables -t nat -A PREROUTING -j REDIRECT -p tcp --dport 11423 --to-ports ssh - - # - # filter - # - - # reset tables - ipXtables -P INPUT DROP - ipXtables -P FORWARD DROP - ipXtables -F - ipXtables -X - - # create custom chains - ipXtables -N Retiolum - - # INPUT - ipXtables -A INPUT -j ACCEPT -m conntrack --ctstate RELATED,ESTABLISHED - ipXtables -A INPUT -j ACCEPT -i lo - ipXtables -A INPUT -j ACCEPT -p tcp --dport ssh -m conntrack --ctstate NEW - #ipXtables -A INPUT -j ACCEPT -p tcp --dport http -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport tinc -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport smtp -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport xmpp-client -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport xmpp-server -m conntrack --ctstate NEW - - ipXtables -A INPUT -j Retiolum -i retiolum - ${when log "ipXtables -A INPUT -j LOG --log-level info --log-prefix 'INPUT DROP '"} - - # FORWARD - ${when log "ipXtables -A FORWARD -j LOG --log-level info --log-prefix 'FORWARD DROP '"} - - # Retiolum - ip4tables -A Retiolum -j ACCEPT -p icmp --icmp-type echo-request - ip6tables -A Retiolum -j ACCEPT -p ipv6-icmp -m icmp6 --icmpv6-type echo-request - - ipXtables -A Retiolum -j ACCEPT -p tcp --dport http -m conntrack --ctstate NEW - - ${when log "ipXtables -A Retiolum -j LOG --log-level info --log-prefix 'REJECT '"} - ipXtables -A Retiolum -j REJECT -p tcp --reject-with tcp-reset - ip4tables -A Retiolum -j REJECT -p udp --reject-with icmp-port-unreachable - ip4tables -A Retiolum -j REJECT --reject-with icmp-proto-unreachable - ip6tables -A Retiolum -j REJECT -p udp --reject-with icmp6-port-unreachable - ip6tables -A Retiolum -j REJECT - fi - ''; -} diff --git a/modules/mkdir/default.nix b/modules/mkdir/default.nix index d525797..9dc426d 100644 --- a/modules/mkdir/default.nix +++ b/modules/mkdir/default.nix @@ -8,7 +8,6 @@ in imports = [ <secrets/hashedPasswords.nix> - ./iptables.nix ./networking.nix ./users.nix ../common/nixpkgs.nix @@ -18,6 +17,22 @@ in ../tv/git/public.nix ../tv/retiolum.nix ../tv/sanitize.nix + { + imports = [ ../tv/iptables ]; + tv.iptables = { + enable = true; + input-internet-accept-new-tcp = [ + "ssh" + "tinc" + "smtp" + "xmpp-client" + "xmpp-server" + ]; + input-retiolum-accept-new-tcp = [ + "http" + ]; + }; + } ]; nix.maxJobs = 1; diff --git a/modules/mkdir/iptables.nix b/modules/mkdir/iptables.nix deleted file mode 100644 index 950aa84..0000000 --- a/modules/mkdir/iptables.nix +++ /dev/null @@ -1,76 +0,0 @@ -{ config, pkgs, ... }: - -{ - # - # iptables - # - networking.firewall.enable = false; - system.activationScripts.iptables = - let - log = false; - when = c: f: if c then f else ""; - in - '' - ip4tables() { ${pkgs.iptables}/sbin/iptables "$@"; } - ip6tables() { ${pkgs.iptables}/sbin/ip6tables "$@"; } - ipXtables() { ip4tables "$@" && ip6tables "$@"; } - - # XXX This fails with the original CAC CentOS 7 kernel. - if ipXtables -vL >/dev/null; then - - # - # nat - # - - # reset tables - ipXtables -t nat -F - ipXtables -t nat -X - - # - ipXtables -t nat -A PREROUTING -j REDIRECT ! -i retiolum -p tcp --dport ssh --to-ports 0 - ipXtables -t nat -A PREROUTING -j REDIRECT -p tcp --dport 11423 --to-ports ssh - - # - # filter - # - - # reset tables - ipXtables -P INPUT DROP - ipXtables -P FORWARD DROP - ipXtables -F - ipXtables -X - - # create custom chains - ipXtables -N Retiolum - - # INPUT - ipXtables -A INPUT -j ACCEPT -m conntrack --ctstate RELATED,ESTABLISHED - ipXtables -A INPUT -j ACCEPT -i lo - ipXtables -A INPUT -j ACCEPT -p tcp --dport ssh -m conntrack --ctstate NEW - #ipXtables -A INPUT -j ACCEPT -p tcp --dport http -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport tinc -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport smtp -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport xmpp-client -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport xmpp-server -m conntrack --ctstate NEW - - ipXtables -A INPUT -j Retiolum -i retiolum - ${when log "ipXtables -A INPUT -j LOG --log-level info --log-prefix 'INPUT DROP '"} - - # FORWARD - ${when log "ipXtables -A FORWARD -j LOG --log-level info --log-prefix 'FORWARD DROP '"} - - # Retiolum - ip4tables -A Retiolum -j ACCEPT -p icmp --icmp-type echo-request - ip6tables -A Retiolum -j ACCEPT -p ipv6-icmp -m icmp6 --icmpv6-type echo-request - - ipXtables -A Retiolum -j ACCEPT -p tcp --dport http -m conntrack --ctstate NEW - - ${when log "ipXtables -A Retiolum -j LOG --log-level info --log-prefix 'REJECT '"} - ipXtables -A Retiolum -j REJECT -p tcp --reject-with tcp-reset - ip4tables -A Retiolum -j REJECT -p udp --reject-with icmp-port-unreachable - ip4tables -A Retiolum -j REJECT --reject-with icmp-proto-unreachable - ip6tables -A Retiolum -j REJECT -p udp --reject-with icmp6-port-unreachable - ip6tables -A Retiolum -j REJECT - fi - ''; -} diff --git a/modules/rmdir/default.nix b/modules/rmdir/default.nix index e514e5d..9879fad 100644 --- a/modules/rmdir/default.nix +++ b/modules/rmdir/default.nix @@ -8,7 +8,6 @@ in imports = [ <secrets/hashedPasswords.nix> - ./iptables.nix ./networking.nix ./users.nix ../common/nixpkgs.nix @@ -18,6 +17,22 @@ in ../tv/git/public.nix ../tv/retiolum.nix ../tv/sanitize.nix + { + imports = [ ../tv/iptables ]; + tv.iptables = { + enable = true; + input-internet-accept-new-tcp = [ + "ssh" + "tinc" + "smtp" + "xmpp-client" + "xmpp-server" + ]; + input-retiolum-accept-new-tcp = [ + "http" + ]; + }; + } ]; nix.maxJobs = 1; diff --git a/modules/rmdir/iptables.nix b/modules/rmdir/iptables.nix deleted file mode 100644 index 950aa84..0000000 --- a/modules/rmdir/iptables.nix +++ /dev/null @@ -1,76 +0,0 @@ -{ config, pkgs, ... }: - -{ - # - # iptables - # - networking.firewall.enable = false; - system.activationScripts.iptables = - let - log = false; - when = c: f: if c then f else ""; - in - '' - ip4tables() { ${pkgs.iptables}/sbin/iptables "$@"; } - ip6tables() { ${pkgs.iptables}/sbin/ip6tables "$@"; } - ipXtables() { ip4tables "$@" && ip6tables "$@"; } - - # XXX This fails with the original CAC CentOS 7 kernel. - if ipXtables -vL >/dev/null; then - - # - # nat - # - - # reset tables - ipXtables -t nat -F - ipXtables -t nat -X - - # - ipXtables -t nat -A PREROUTING -j REDIRECT ! -i retiolum -p tcp --dport ssh --to-ports 0 - ipXtables -t nat -A PREROUTING -j REDIRECT -p tcp --dport 11423 --to-ports ssh - - # - # filter - # - - # reset tables - ipXtables -P INPUT DROP - ipXtables -P FORWARD DROP - ipXtables -F - ipXtables -X - - # create custom chains - ipXtables -N Retiolum - - # INPUT - ipXtables -A INPUT -j ACCEPT -m conntrack --ctstate RELATED,ESTABLISHED - ipXtables -A INPUT -j ACCEPT -i lo - ipXtables -A INPUT -j ACCEPT -p tcp --dport ssh -m conntrack --ctstate NEW - #ipXtables -A INPUT -j ACCEPT -p tcp --dport http -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport tinc -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport smtp -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport xmpp-client -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport xmpp-server -m conntrack --ctstate NEW - - ipXtables -A INPUT -j Retiolum -i retiolum - ${when log "ipXtables -A INPUT -j LOG --log-level info --log-prefix 'INPUT DROP '"} - - # FORWARD - ${when log "ipXtables -A FORWARD -j LOG --log-level info --log-prefix 'FORWARD DROP '"} - - # Retiolum - ip4tables -A Retiolum -j ACCEPT -p icmp --icmp-type echo-request - ip6tables -A Retiolum -j ACCEPT -p ipv6-icmp -m icmp6 --icmpv6-type echo-request - - ipXtables -A Retiolum -j ACCEPT -p tcp --dport http -m conntrack --ctstate NEW - - ${when log "ipXtables -A Retiolum -j LOG --log-level info --log-prefix 'REJECT '"} - ipXtables -A Retiolum -j REJECT -p tcp --reject-with tcp-reset - ip4tables -A Retiolum -j REJECT -p udp --reject-with icmp-port-unreachable - ip4tables -A Retiolum -j REJECT --reject-with icmp-proto-unreachable - ip6tables -A Retiolum -j REJECT -p udp --reject-with icmp6-port-unreachable - ip6tables -A Retiolum -j REJECT - fi - ''; -} diff --git a/modules/tv/iptables/config.nix b/modules/tv/iptables/config.nix new file mode 100644 index 0000000..a525cfa --- /dev/null +++ b/modules/tv/iptables/config.nix @@ -0,0 +1,93 @@ +{ cfg, lib, pkgs, ... }: + +let + inherit (pkgs) writeScript writeText; + inherit (lib) concatMapStringsSep; + + accept-new-tcp = port: + "-p tcp -m tcp --dport ${port} -m conntrack --ctstate NEW -j ACCEPT"; + + rules = iptables-version: + writeText "tv-iptables-rules${toString iptables-version}" '' + *nat + :PREROUTING ACCEPT [0:0] + :INPUT ACCEPT [0:0] + :OUTPUT ACCEPT [0:0] + :POSTROUTING ACCEPT [0:0] + ${concatMapStringsSep "\n" (rule: "-A PREROUTING ${rule}") ([] + ++ [ + "! -i retiolum -p tcp -m tcp --dport 22 -j REDIRECT --to-ports 0" + "-p tcp -m tcp --dport 11423 -j REDIRECT --to-ports 22" + ] + )} + COMMIT + *filter + :INPUT DROP [0:0] + :FORWARD DROP [0:0] + :OUTPUT ACCEPT [0:0] + :Retiolum - [0:0] + ${concatMapStringsSep "\n" (rule: "-A INPUT ${rule}") ([] + ++ [ + "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT" + "-i lo -j ACCEPT" + ] + ++ map accept-new-tcp cfg.input-internet-accept-new-tcp + ++ ["-i retiolum -j Retiolum"] + )} + ${concatMapStringsSep "\n" (rule: "-A Retiolum ${rule}") ([] + ++ { + ip4tables = [ + "-p icmp -m icmp --icmp-type echo-request -j ACCEPT" + ]; + ip6tables = [ + "-p ipv6-icmp -m icmp6 --icmpv6-type echo-request -j ACCEPT" + ]; + }."ip${toString iptables-version}tables" + ++ map accept-new-tcp cfg.input-retiolum-accept-new-tcp + ++ { + ip4tables = [ + "-p tcp -j REJECT --reject-with tcp-reset" + "-p udp -j REJECT --reject-with icmp-port-unreachable" + "-j REJECT --reject-with icmp-proto-unreachable" + ]; + ip6tables = [ + "-p tcp -j REJECT --reject-with tcp-reset" + "-p udp -j REJECT --reject-with icmp6-port-unreachable" + "-j REJECT" + ]; + }."ip${toString iptables-version}tables" + )} + COMMIT + ''; + + startScript = writeScript "tv-iptables_start" '' + #! /bin/sh + set -euf + iptables-restore < ${rules 4} + ip6tables-restore < ${rules 6} + ''; +in + +{ + networking.firewall.enable = false; + + systemd.services.tv-iptables = { + description = "tv-iptables"; + wantedBy = [ "network-pre.target" ]; + before = [ "network-pre.target" ]; + after = [ "systemd-modules-load.service" ]; + + path = with pkgs; [ + iptables + ]; + + restartIfChanged = true; + + serviceConfig = { + Type = "simple"; + RemainAfterExit = true; + Restart = "always"; + ExecStart = "@${startScript} tv-iptables_start"; + }; + }; +} diff --git a/modules/tv/iptables/default.nix b/modules/tv/iptables/default.nix new file mode 100644 index 0000000..cf27a26 --- /dev/null +++ b/modules/tv/iptables/default.nix @@ -0,0 +1,11 @@ +arg@{ config, lib, pkgs, ... }: + +let + cfg = config.tv.iptables; + arg' = arg // { inherit cfg; }; +in + +{ + options.tv.iptables = import ./options.nix arg'; + config = lib.mkIf cfg.enable (import ./config.nix arg'); +} diff --git a/modules/tv/iptables/options.nix b/modules/tv/iptables/options.nix new file mode 100644 index 0000000..79be1d0 --- /dev/null +++ b/modules/tv/iptables/options.nix @@ -0,0 +1,29 @@ +{ lib, ... }: + +let + inherit (lib) mkOption types; +in + +{ + enable = mkOption { + type = types.bool; + default = false; + description = "Enable iptables."; + }; + + input-internet-accept-new-tcp = mkOption { + type = with types; listOf str; + default = []; + description = '' + ip{4,6}tables -A INPUT -j ACCEPT -p tcp --dport $port -m conntrack --ctstate NEW + ''; + }; + + input-retiolum-accept-new-tcp = mkOption { + type = with types; listOf str; + default = []; + description = '' + ip{4,6}tables -A Retiolum -j ACCEPT -p tcp --dport $port -m conntrack --ctstate NEW + ''; + }; +} diff --git a/modules/wu/default.nix b/modules/wu/default.nix index 68475ad..76e8c6b 100644 --- a/modules/wu/default.nix +++ b/modules/wu/default.nix @@ -9,7 +9,6 @@ in { imports = [ ./hosts.nix - ./iptables.nix ../common/nixpkgs.nix ../tv/base.nix ../tv/exim-retiolum.nix @@ -22,6 +21,18 @@ in ../tv/urxvt.nix ../tv/xserver.nix ../wu/users.nix + { + imports = [ ../tv/iptables ]; + tv.iptables = { + enable = true; + input-internet-accept-new-tcp = [ + "ssh" + "http" + "tinc" + "smtp" + ]; + }; + } ]; nix.maxJobs = 8; diff --git a/modules/wu/iptables.nix b/modules/wu/iptables.nix deleted file mode 100644 index ee40343..0000000 --- a/modules/wu/iptables.nix +++ /dev/null @@ -1,69 +0,0 @@ -{ config, pkgs, ... }: - -{ - # - # iptables - # - networking.firewall.enable = false; - system.activationScripts.iptables = - let - log = false; - when = c: f: if c then f else ""; - in - '' - ip4tables() { ${pkgs.iptables}/sbin/iptables "$@"; } - ip6tables() { ${pkgs.iptables}/sbin/ip6tables "$@"; } - ipXtables() { ip4tables "$@"; ip6tables "$@"; } - - # - # nat - # - - # reset tables - ipXtables -t nat -F - ipXtables -t nat -X - - # - ipXtables -t nat -A PREROUTING -j REDIRECT ! -i retiolum -p tcp --dport ssh --to-ports 0 - ipXtables -t nat -A PREROUTING -j REDIRECT -p tcp --dport 11423 --to-ports ssh - - # - # filter - # - - # reset tables - ipXtables -P INPUT DROP - ipXtables -P FORWARD DROP - ipXtables -F - ipXtables -X - - # create custom chains - ipXtables -N Retiolum - - # INPUT - ipXtables -A INPUT -j ACCEPT -m conntrack --ctstate RELATED,ESTABLISHED - ipXtables -A INPUT -j ACCEPT -i lo - ipXtables -A INPUT -j ACCEPT -p tcp --dport ssh -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport http -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport tinc -m conntrack --ctstate NEW - ipXtables -A INPUT -j ACCEPT -p tcp --dport smtp -m conntrack --ctstate NEW - ipXtables -A INPUT -j Retiolum -i retiolum - ${when log "ipXtables -A INPUT -j LOG --log-level info --log-prefix 'INPUT DROP '"} - - # FORWARD - ${when log "ipXtables -A FORWARD -j LOG --log-level info --log-prefix 'FORWARD DROP '"} - - # Retiolum - ip4tables -A Retiolum -j ACCEPT -p icmp --icmp-type echo-request - ip6tables -A Retiolum -j ACCEPT -p ipv6-icmp -m icmp6 --icmpv6-type echo-request - - - ${when log "ipXtables -A Retiolum -j LOG --log-level info --log-prefix 'REJECT '"} - ipXtables -A Retiolum -j REJECT -p tcp --reject-with tcp-reset - ip4tables -A Retiolum -j REJECT -p udp --reject-with icmp-port-unreachable - ip4tables -A Retiolum -j REJECT --reject-with icmp-proto-unreachable - ip6tables -A Retiolum -j REJECT -p udp --reject-with icmp6-port-unreachable - ip6tables -A Retiolum -j REJECT - - ''; -} |