Add central host-wide firewall allow/block lists

New model.IPListEntry + jsondb CRUD, independent of any single WireGuard server. firewall.GenerateGlobalRuleset builds an nftables table (wireguard_ui_global) with allow/block sets evaluated at priority -10 - before every per-server table - so it applies to all traffic on the host, not just WireGuard. Allow entries always win over block entries. firewall.ApplyGlobal loads it live via `nft -f`, scoped to that one table. New "Global Firewall Lists" page (nav entry under Settings): add/delete entries, ruleset preview, "Apply now (live)" with an explicit confirm() warning since this affects the whole host's firewall, not just one server. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-07-12 17:45:53 +02:00
parent bdcf1ec60c
commit eb1913d400
10 changed files with 438 additions and 9 deletions
@@ -0,0 +1,63 @@
+package firewall
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/ngoduykhanh/wireguard-ui/model"
+)
+
+// GlobalTableName is the dedicated nftables table for the host-wide
+// allow/block lists, kept separate from every per-server table.
+const GlobalTableName = "wireguard_ui_global"
+
+// GenerateGlobalRuleset renders the host-wide allow/block list ruleset.
+// It runs at priority -10, before any per-server table (priority 0), so it
+// applies to ALL traffic on the host, not just WireGuard - this is meant to
+// be the one central place for IP allow/block lists. Allow entries take
+// precedence over block entries.
+func GenerateGlobalRuleset(entries []model.IPListEntry) string {
+	var allow, block []string
+	for _, e := range entries {
+		if e.ListType == "allow" {
+			allow = append(allow, e.CIDR)
+		} else if e.ListType == "block" {
+			block = append(block, e.CIDR)
+		}
+	}
+
+	var b strings.Builder
+	fmt.Fprintf(&b, "# Host-wide allow/block list, generated by wireguard-ui-multi.\n")
+	fmt.Fprintf(&b, "# Applies to all traffic on this host (priority -10), before any\n")
+	fmt.Fprintf(&b, "# per-server WireGuard firewall table.\n\n")
+
+	fmt.Fprintf(&b, "table inet %s {\n", GlobalTableName)
+
+	fmt.Fprintf(&b, "    set allowlist {\n        type ipv4_addr; flags interval;\n")
+	if len(allow) > 0 {
+		fmt.Fprintf(&b, "        elements = { %s }\n", strings.Join(allow, ", "))
+	}
+	fmt.Fprintf(&b, "    }\n\n")
+
+	fmt.Fprintf(&b, "    set blocklist {\n        type ipv4_addr; flags interval;\n")
+	if len(block) > 0 {
+		fmt.Fprintf(&b, "        elements = { %s }\n", strings.Join(block, ", "))
+	}
+	fmt.Fprintf(&b, "    }\n\n")
+
+	fmt.Fprintf(&b, "    chain input {\n")
+	fmt.Fprintf(&b, "        type filter hook input priority -10; policy accept;\n")
+	fmt.Fprintf(&b, "        ip saddr @allowlist accept comment \"wg-ui-multi: global allowlist\"\n")
+	fmt.Fprintf(&b, "        ip saddr @blocklist drop comment \"wg-ui-multi: global blocklist\"\n")
+	fmt.Fprintf(&b, "    }\n\n")
+
+	fmt.Fprintf(&b, "    chain forward {\n")
+	fmt.Fprintf(&b, "        type filter hook forward priority -10; policy accept;\n")
+	fmt.Fprintf(&b, "        ip saddr @allowlist accept comment \"wg-ui-multi: global allowlist\"\n")
+	fmt.Fprintf(&b, "        ip saddr @blocklist drop comment \"wg-ui-multi: global blocklist\"\n")
+	fmt.Fprintf(&b, "    }\n")
+
+	fmt.Fprintf(&b, "}\n")
+
+	return b.String()
+}