From 0e9cb9fcfda189bde0cd6bbd47773b5e7b041e3d Mon Sep 17 00:00:00 2001 From: Izorkin Date: Wed, 4 Jan 2023 18:05:13 +0300 Subject: nixos/dhcpcd: don't solicit or accept ipv6 router advertisements if use static addresses --- nixos/doc/manual/from_md/release-notes/rl-2305.section.xml | 7 +++++++ nixos/doc/manual/release-notes/rl-2305.section.md | 2 ++ nixos/modules/services/networking/dhcpcd.nix | 9 +++++++++ 3 files changed, 18 insertions(+) (limited to 'nixos') diff --git a/nixos/doc/manual/from_md/release-notes/rl-2305.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2305.section.xml index 518a89688b95b..6db398db4c809 100644 --- a/nixos/doc/manual/from_md/release-notes/rl-2305.section.xml +++ b/nixos/doc/manual/from_md/release-notes/rl-2305.section.xml @@ -377,6 +377,13 @@ security. + + + services.dhcpcd service now don’t solicit + or accept IPv6 Router Advertisements on interfaces that use + static IPv6 addresses. + + The module services.headscale was diff --git a/nixos/doc/manual/release-notes/rl-2305.section.md b/nixos/doc/manual/release-notes/rl-2305.section.md index 312ff3463039a..d6a2c7b67e83f 100644 --- a/nixos/doc/manual/release-notes/rl-2305.section.md +++ b/nixos/doc/manual/release-notes/rl-2305.section.md @@ -104,6 +104,8 @@ In addition to numerous new and upgraded packages, this release has the followin - `services.chronyd` is now started with additional systemd sandbox/hardening options for better security. +- `services.dhcpcd` service now don't solicit or accept IPv6 Router Advertisements on interfaces that use static IPv6 addresses. + - The module `services.headscale` was refactored to be compliant with [RFC 0042](https://github.com/NixOS/rfcs/blob/master/rfcs/0042-config-option.md). To be precise, this means that the following things have changed: - Most settings has been migrated under [services.headscale.settings](#opt-services.headscale.settings) which is an attribute-set that diff --git a/nixos/modules/services/networking/dhcpcd.nix b/nixos/modules/services/networking/dhcpcd.nix index ac5d45a65e3b8..9a0b29fbe5a7f 100644 --- a/nixos/modules/services/networking/dhcpcd.nix +++ b/nixos/modules/services/networking/dhcpcd.nix @@ -33,6 +33,13 @@ let (if !config.networking.useDHCP && enableDHCP then map (i: i.name) (filter (i: i.useDHCP == true) interfaces) else null); + staticIPv6Addresses = map (i: i.name) (filter (i: i.ipv6.addresses != [ ]) interfaces); + + noIPv6rs = concatStringsSep "\n" (map (name: '' + interface ${name} + noipv6rs + '') staticIPv6Addresses); + # Config file adapted from the one that ships with dhcpcd. dhcpcdConf = pkgs.writeText "dhcpcd.conf" '' @@ -75,6 +82,8 @@ let ''} ${cfg.extraConfig} + + ${optionalString config.networking.enableIPv6 noIPv6rs} ''; exitHook = pkgs.writeText "dhcpcd.exit-hook" -- cgit 1.4.1