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firewall: fix rpfilter blocking dhcp offers when no ip was bound yet

This commit is contained in:
Mathijs Kwik 2017-11-19 22:11:32 +01:00
parent 944f35741c
commit 05761e9504
1 changed files with 3 additions and 0 deletions
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3
nixos/modules/services/networking/firewall.nix
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@ -125,6 +125,9 @@ let
ip46tables -t raw -N nixos-fw-rpfilter 2> /dev/null || true
ip46tables -t raw -A nixos-fw-rpfilter -m rpfilter ${optionalString (cfg.checkReversePath == "loose") "--loose"} -j RETURN
# Allows this host to act as a DHCP4 client without first having to use APIPA
iptables -t raw -A nixos-fw-rpfilter -p udp --sport 67 --dport 68 -j RETURN
# Allows this host to act as a DHCPv4 server
iptables -t raw -A nixos-fw-rpfilter -s 0.0.0.0 -d 255.255.255.255 -p udp --sport 68 --dport 67 -j RETURN