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| author | Tomas Volf <wolf@wolfsden.cz> | 2023-08-14 01:21:33 +0200 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2023-10-20 00:33:26 +0200 |
| commit | 82f9e5ac97e076d57b8502c920ac770a82879b9a (patch) | |
| tree | 9eeed3200a00529e20c2e4bf706b1ff26e50ca67 /gnu | |
| parent | 6156bf9078e52483cad01ca3fad2ad793773d0bc (diff) | |
| download | guix-82f9e5ac97e076d57b8502c920ac770a82879b9a.tar guix-82f9e5ac97e076d57b8502c920ac770a82879b9a.tar.gz | |
services: nftables: Tighten the default rules.
Packets for local host IP ranges should be coming only over lo. If that is
not the case, we should drop them. Use iif for the check instead of iifname,
lo is guaranteed to exists, and iif is faster.
* gnu/services/networking.scm (%default-nftables-ruleset): Tighten the rules.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Diffstat (limited to 'gnu')
| -rw-r--r-- | gnu/services/networking.scm | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gnu/services/networking.scm b/gnu/services/networking.scm index 99889e3072..0508a4282c 100644 --- a/gnu/services/networking.scm +++ b/gnu/services/networking.scm @@ -1813,7 +1813,10 @@ table inet filter { ct state { established, related } accept # allow from loopback - iifname lo accept + iif lo accept + # drop connections to lo not coming from lo + iif != lo ip daddr 127.0.0.1/8 drop + iif != lo ip6 daddr ::1/128 drop # allow icmp ip protocol icmp accept |