From 71799a8f6d1450b63071a21cad6ed434b348d3d5 Mon Sep 17 00:00:00 2001 From: Tom Yan Date: Fri, 17 Jun 2022 19:34:19 +0800 Subject: [PATCH] wg-quick: linux: prevent traffic from momentarily leaking into tunnel The wireguard route table ip rule should stay as a no-op until the `suppress_prefixlength 0 table main` rule is in effect. Therefore, add the wireguard default route to its route table after the latter rule is added. Signed-off-by: Tom Yan Signed-off-by: Jason A. Donenfeld --- src/wg-quick/linux.bash | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/wg-quick/linux.bash b/src/wg-quick/linux.bash index e4d4c4f..69e5bef 100755 --- a/src/wg-quick/linux.bash +++ b/src/wg-quick/linux.bash @@ -220,9 +220,9 @@ add_default() { fi local proto=-4 iptables=iptables pf=ip [[ $1 == *:* ]] && proto=-6 iptables=ip6tables pf=ip6 - cmd ip $proto route add "$1" dev "$INTERFACE" table $table cmd ip $proto rule add not fwmark $table table $table cmd ip $proto rule add table main suppress_prefixlength 0 + cmd ip $proto route add "$1" dev "$INTERFACE" table $table local marker="-m comment --comment \"wg-quick(8) rule for $INTERFACE\"" restore=$'*raw\n' nftable="wg-quick-$INTERFACE" nftcmd printf -v nftcmd '%sadd table %s %s\n' "$nftcmd" "$pf" "$nftable"