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diff --git a/src/tools/wg-quick/linux.bash b/src/tools/wg-quick/linux.bash
--- a/src/tools/wg-quick/linux.bash
+++ b/src/tools/wg-quick/linux.bash
@@ -201,7 +201,7 @@
cmd ip $proto rule add table main suppress_prefixlength 0
while read -r key _ value; do
[[ $value -eq 1 ]] && sysctl -q "$key=2"
- done < <(sysctl -a -r '^net\.ipv4.conf\.[^ .=]+\.rp_filter$')
+ done < <(sysctl -a 2>/dev/null | sed -n -r 's#^(net\.ipv4.conf\.[^ .=]+\.rp_filter)#\1#p')
return 0
}
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