feat(fail2ban): manage trusted IP addresses and networks

AppImage/components/security.tsx

@@ -251,6 +251,15 @@ export function Security() {
   })
   const [f2bSavingConfig, setF2bSavingConfig] = useState(false)
   const [f2bApplyingJails, setF2bApplyingJails] = useState(false)
+  const [f2bTrustedNetworks, setF2bTrustedNetworks] = useState<Array<{value: string; protected: boolean}>>([])
+  const [f2bDetectedIp, setF2bDetectedIp] = useState("")
+  const [f2bTrustedInput, setF2bTrustedInput] = useState("")
+  const [f2bSavingTrusted, setF2bSavingTrusted] = useState(false)
+  const [f2bRemovingTrusted, setF2bRemovingTrusted] = useState<string | null>(null)
+  const [f2bShowTrustedForm, setF2bShowTrustedForm] = useState(false)
+  const [f2bEditingTrusted, setF2bEditingTrusted] = useState<string | null>(null)
+  const [f2bTrustedEditInput, setF2bTrustedEditInput] = useState("")
+  const [f2bTrustedNotice, setF2bTrustedNotice] = useState<{type: "success" | "error"; text: string} | null>(null)
 
   // SSL/HTTPS state
   const [sslEnabled, setSslEnabled] = useState(false)
@@ -380,9 +389,10 @@ export function Security() {
   const loadFail2banDetails = async () => {
     try {
       setF2bDetailsLoading(true)
-      const [detailsRes, activityRes] = await Promise.all([
+      const [detailsRes, activityRes, trustedRes] = await Promise.all([
         fetchApi("/api/security/fail2ban/details"),
         fetchApi("/api/security/fail2ban/activity"),
+        fetchApi("/api/security/fail2ban/trusted-networks"),
       ])
       if (detailsRes.success) {
         setF2bDetails({
@@ -395,6 +405,10 @@ export function Security() {
       if (activityRes.success) {
         setF2bActivity(activityRes.events || [])
       }
+      if (trustedRes.success) {
+        setF2bTrustedNetworks(trustedRes.entries || [])
+        setF2bDetectedIp(trustedRes.detected_ip || "")
+      }
     } catch {
       // Silently fail
     } finally {
@@ -402,6 +416,86 @@ export function Security() {
     }
   }
 
+  const trustedNetworkError = (message?: string) => {
+    if (message?.includes("already trusted")) return st("errors.trustedNetworkExists")
+    if (message?.includes("Invalid IP") || message?.includes("Enter one IP")) return st("errors.invalidTrustedNetwork")
+    return st("errors.updateTrustedNetworksFailed")
+  }
+
+  const handleAddTrustedNetwork = async (value?: string) => {
+    const candidate = (value || f2bTrustedInput).trim()
+    if (!candidate) {
+      setF2bTrustedNotice({ type: "error", text: st("errors.invalidTrustedNetwork") })
+      return
+    }
+    setF2bSavingTrusted(true)
+    setF2bTrustedNotice(null)
+    try {
+      const data = await fetchApi("/api/security/fail2ban/trusted-networks", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ value: candidate }),
+      })
+      if (data.success) {
+        setF2bTrustedNotice({ type: "success", text: st("messages.trustedNetworkAdded", { value: data.value || candidate }) })
+        setF2bTrustedInput("")
+        setF2bShowTrustedForm(false)
+        await loadFail2banDetails()
+      } else {
+        setF2bTrustedNotice({ type: "error", text: trustedNetworkError(data.message) })
+      }
+    } catch (err) {
+      setF2bTrustedNotice({ type: "error", text: trustedNetworkError(err instanceof Error ? err.message : undefined) })
+    } finally {
+      setF2bSavingTrusted(false)
+    }
+  }
+
+  const handleRemoveTrustedNetwork = async (value: string) => {
+    setF2bRemovingTrusted(value)
+    setF2bTrustedNotice(null)
+    try {
+      const data = await fetchApi("/api/security/fail2ban/trusted-networks", {
+        method: "DELETE",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ value }),
+      })
+      if (data.success) {
+        setF2bTrustedNotice({ type: "success", text: st("messages.trustedNetworkRemoved", { value }) })
+        await loadFail2banDetails()
+      } else {
+        setF2bTrustedNotice({ type: "error", text: st("errors.updateTrustedNetworksFailed") })
+      }
+    } catch {
+      setF2bTrustedNotice({ type: "error", text: st("errors.updateTrustedNetworksFailed") })
+    } finally {
+      setF2bRemovingTrusted(null)
+    }
+  }
+
+  const handleUpdateTrustedNetwork = async () => {
+    if (!f2bEditingTrusted || !f2bTrustedEditInput.trim()) return
+    setF2bSavingTrusted(true)
+    setF2bTrustedNotice(null)
+    try {
+      const data = await fetchApi("/api/security/fail2ban/trusted-networks", {
+        method: "PUT",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ old_value: f2bEditingTrusted, new_value: f2bTrustedEditInput.trim() }),
+      })
+      if (data.success) {
+        setF2bTrustedNotice({ type: "success", text: st("messages.trustedNetworkUpdated", { value: data.value }) })
+        setF2bEditingTrusted(null)
+        setF2bTrustedEditInput("")
+        await loadFail2banDetails()
+      }
+    } catch (err) {
+      setF2bTrustedNotice({ type: "error", text: trustedNetworkError(err instanceof Error ? err.message : undefined) })
+    } finally {
+      setF2bSavingTrusted(false)
+    }
+  }
+
   const handleUnbanIp = async (jail: string, ip: string) => {
     const key = `${jail}:${ip}`
     setF2bUnbanning(key)
@@ -3350,32 +3444,147 @@ ${(report.sections && report.sections.length > 0) ? `
 
               {fail2banInfo.active && f2bDetails && (
                 <>
-                  {/* Summary stats - inline */}
+                  {/* Global Fail2Ban allowlist */}
-                  <div className="flex items-center gap-4 flex-wrap px-3 py-2.5 bg-muted/30 rounded-lg border border-border">
+                  <div className="rounded-lg border border-green-500/15 overflow-hidden shadow-sm">
-                    <div className="flex items-center gap-1.5 text-sm">
+                    <div className="flex items-start justify-between gap-3 p-3 bg-gradient-to-r from-green-500/[0.07] via-green-500/[0.03] to-transparent border-l-2 border-green-500/60">
-                      <span className="text-muted-foreground">{st("fail2ban.jails")}:</span>
+                      <div className="flex items-start gap-2.5 min-w-0">
-                      <span className="font-bold">{f2bDetails.jails.length}</span>
+                        <div className="w-8 h-8 rounded-md bg-green-500/10 flex items-center justify-center shrink-0">
+                          <Network className="h-4 w-4 text-green-500" />
+                        </div>
+                        <div className="min-w-0">
+                          <p className="text-sm font-semibold">{st("fail2ban.trustedNetworks.title")}</p>
+                          <p className="text-xs text-muted-foreground mt-0.5">{st("fail2ban.trustedNetworks.description")}</p>
+                        </div>
+                      </div>
+                      <Button
+                        variant="outline"
+                        size="sm"
+                        onClick={() => { setF2bShowTrustedForm(!f2bShowTrustedForm); setF2bTrustedNotice(null) }}
+                        className="h-7 text-xs text-orange-500 border-orange-500/30 hover:bg-orange-500/10 bg-transparent shrink-0"
+                      >
+                        <Plus className="h-3 w-3 mr-1" />
+                        {st("fail2ban.trustedNetworks.addRule")}
+                      </Button>
                     </div>
-                    <div className="w-px h-4 bg-border" />
+
-                    <div className="flex items-center gap-1.5 text-sm">
+                    {f2bTrustedNotice && (
-                      <span className="text-muted-foreground">{st("fail2ban.bannedIps")}:</span>
+                      <div className={`mx-3 mt-3 rounded-md border px-3 py-2 text-xs ${f2bTrustedNotice.type === "success" ? "border-green-500/20 bg-green-500/10 text-green-500" : "border-red-500/20 bg-red-500/10 text-red-500"}`}>
-                      <span className={`font-bold ${f2bDetails.jails.reduce((a, j) => a + j.currently_banned, 0) > 0 ? "text-red-500" : "text-green-500"}`}>
+                        {f2bTrustedNotice.text}
+                      </div>
+                    )}
+
+                    {f2bShowTrustedForm && (
+                      <div className="m-3 rounded-lg border border-border bg-muted/20 p-3 space-y-3">
+                        <div>
+                          <Label className="text-[10px] text-muted-foreground uppercase">{st("fail2ban.trustedNetworks.addressOrNetwork")}</Label>
+                          <Input
+                            value={f2bTrustedInput}
+                            onChange={(event) => setF2bTrustedInput(event.target.value)}
+                            onKeyDown={(event) => { if (event.key === "Enter") { event.preventDefault(); handleAddTrustedNetwork() } }}
+                            placeholder={st("fail2ban.trustedNetworks.placeholder")}
+                            className="h-8 font-mono text-xs mt-1"
+                          />
+                          <p className="mt-1.5 text-[10px] text-muted-foreground">{st("fail2ban.trustedNetworks.example")}</p>
+                        </div>
+                        <div className="flex flex-wrap items-center justify-between gap-2">
+                          {f2bDetectedIp && !f2bTrustedNetworks.some((entry) => entry.value === f2bDetectedIp) ? (
+                            <Button variant="ghost" size="sm" onClick={() => setF2bTrustedInput(f2bDetectedIp)} className="h-7 text-xs text-blue-400">
+                              {st("fail2ban.trustedNetworks.useCurrent", { ip: f2bDetectedIp })}
+                            </Button>
+                          ) : <span />}
+                          <div className="flex gap-2 ml-auto">
+                            <Button variant="ghost" size="sm" onClick={() => { setF2bShowTrustedForm(false); setF2bTrustedInput("") }} className="h-7 text-xs text-muted-foreground">
+                              {t("actions.cancel")}
+                            </Button>
+                            <Button size="sm" onClick={() => handleAddTrustedNetwork()} disabled={f2bSavingTrusted || !f2bTrustedInput.trim()} className="h-7 text-xs bg-orange-600 hover:bg-orange-700 text-white">
+                              {f2bSavingTrusted ? <span className="h-3 w-3 animate-spin rounded-full border-2 border-white border-t-transparent mr-1" /> : <Plus className="h-3 w-3 mr-1" />}
+                              {st("fail2ban.trustedNetworks.add")}
+                            </Button>
+                          </div>
+                        </div>
+                      </div>
+                    )}
+
+                    <div className="hidden sm:grid grid-cols-[1.1fr_0.65fr_2fr_1.5fr] gap-3 border-t border-border bg-muted/20 px-3 py-2 text-[9px] font-medium uppercase tracking-wider text-muted-foreground">
+                      <span>{st("fail2ban.trustedNetworks.columns.status")}</span>
+                      <span>{st("fail2ban.trustedNetworks.columns.type")}</span>
+                      <span>{st("fail2ban.trustedNetworks.columns.address")}</span>
+                      <span className="text-right">{st("fail2ban.trustedNetworks.columns.actions")}</span>
+                    </div>
+
+                    <div className="divide-y divide-border border-t border-border sm:border-t-0">
+                      {f2bTrustedNetworks.map((entry) => (
+                        <div key={entry.value} className="px-3 py-2.5 transition-colors hover:bg-muted/20">
+                          {f2bEditingTrusted === entry.value ? (
+                            <div className="flex flex-col sm:flex-row gap-2 items-end">
+                              <div className="flex-1 w-full">
+                                <Label className="text-[10px] text-muted-foreground uppercase">{st("fail2ban.trustedNetworks.addressOrNetwork")}</Label>
+                                <Input value={f2bTrustedEditInput} onChange={(event) => setF2bTrustedEditInput(event.target.value)} className="h-8 font-mono text-xs mt-1" />
+                              </div>
+                              <Button variant="ghost" size="sm" onClick={() => setF2bEditingTrusted(null)} className="h-7 text-xs text-muted-foreground">{t("actions.cancel")}</Button>
+                              <Button variant="outline" size="sm" onClick={handleUpdateTrustedNetwork} disabled={f2bSavingTrusted || !f2bTrustedEditInput.trim()} className="h-7 text-xs text-green-500 border-green-500/30 hover:bg-green-500/10 bg-transparent">
+                                <Check className="h-3 w-3 mr-1" />{st("fail2ban.trustedNetworks.save")}
+                              </Button>
+                            </div>
+                          ) : (
+                            <div className="grid grid-cols-1 sm:grid-cols-[1.1fr_0.65fr_2fr_1.5fr] gap-2 sm:gap-3 items-center">
+                              <div className="flex items-center gap-2">
+                                <span className={`inline-flex items-center rounded px-1.5 py-0.5 text-[9px] font-bold uppercase tracking-wide ${entry.protected ? "bg-slate-500/15 text-slate-400 border border-slate-500/20" : "bg-green-500/15 text-green-500 border border-green-500/20"}`}>
+                                  {entry.protected ? st("fail2ban.trustedNetworks.system") : st("fail2ban.trustedNetworks.trusted")}
+                                </span>
+                              </div>
+                              <div>
+                                <span className={`inline-flex rounded px-1.5 py-0.5 text-[9px] font-bold uppercase ${entry.value.includes("/") ? "bg-purple-500/15 text-purple-400" : "bg-blue-500/15 text-blue-400"}`}>
+                                  {entry.value.includes("/") ? "CIDR" : "IP"}
+                                </span>
+                              </div>
+                              <code className="text-xs text-muted-foreground font-mono break-all">{entry.value}</code>
+                              <div className="flex gap-2 sm:justify-end shrink-0">
+                                {!entry.protected ? (
+                                  <>
+                                  <Button variant="outline" size="sm" onClick={() => { setF2bEditingTrusted(entry.value); setF2bTrustedEditInput(entry.value); setF2bTrustedNotice(null) }} className="h-7 text-xs text-blue-400 border-blue-400/30 hover:bg-blue-400/10 bg-transparent">
+                                    <Pencil className="h-3 w-3 mr-1" />{st("fail2ban.trustedNetworks.edit")}
+                                  </Button>
+                                  <Button variant="outline" size="sm" onClick={() => handleRemoveTrustedNetwork(entry.value)} disabled={f2bRemovingTrusted === entry.value} className="h-7 text-xs text-red-500 border-red-500/30 hover:bg-red-500/10 bg-transparent">
+                                    {f2bRemovingTrusted === entry.value ? <span className="h-3 w-3 animate-spin rounded-full border-2 border-current border-t-transparent mr-1" /> : <Trash2 className="h-3 w-3 mr-1" />}
+                                    {st("fail2ban.trustedNetworks.delete")}
+                                  </Button>
+                                  </>
+                                ) : (
+                                  <span className="inline-flex items-center text-[10px] text-muted-foreground"><Lock className="h-3 w-3 mr-1" />{st("fail2ban.trustedNetworks.required")}</span>
+                                )}
+                              </div>
+                            </div>
+                          )}
+                        </div>
+                      ))}
+                    </div>
+
+                    <div className="flex items-start gap-2 border-t border-border bg-amber-500/5 px-3 py-2 text-[11px] text-amber-500">
+                      <AlertTriangle className="h-3.5 w-3.5 mt-0.5 shrink-0" />
+                      <p>{st("fail2ban.trustedNetworks.warning")}</p>
+                    </div>
+                  </div>
+
+                  {/* Summary stats */}
+                  <div className="grid grid-cols-2 sm:grid-cols-4 gap-2">
+                    <div className="p-3 bg-muted/50 rounded-lg border border-border text-center">
+                      <p className="text-lg font-bold text-foreground">{f2bDetails.jails.length}</p>
+                      <p className="text-[10px] text-muted-foreground uppercase tracking-wider">{st("fail2ban.jails")}</p>
+                    </div>
+                    <div className={`p-3 rounded-lg border text-center ${f2bDetails.jails.reduce((a, j) => a + j.currently_banned, 0) > 0 ? "bg-red-500/5 border-red-500/20" : "bg-muted/50 border-border"}`}>
+                      <p className={`text-lg font-bold ${f2bDetails.jails.reduce((a, j) => a + j.currently_banned, 0) > 0 ? "text-red-500" : "text-foreground"}`}>
                         {f2bDetails.jails.reduce((a, j) => a + j.currently_banned, 0)}
-                      </span>
+                      </p>
+                      <p className={`text-[10px] uppercase tracking-wider ${f2bDetails.jails.reduce((a, j) => a + j.currently_banned, 0) > 0 ? "text-red-500/70" : "text-muted-foreground"}`}>{st("fail2ban.bannedIps")}</p>
                     </div>
-                    <div className="w-px h-4 bg-border" />
+                    <div className="p-3 bg-orange-500/5 rounded-lg border border-orange-500/20 text-center">
-                    <div className="flex items-center gap-1.5 text-sm">
+                      <p className="text-lg font-bold text-orange-500">{f2bDetails.jails.reduce((a, j) => a + j.total_banned, 0)}</p>
-                      <span className="text-muted-foreground">{st("fail2ban.totalBans")}:</span>
+                      <p className="text-[10px] text-orange-500/70 uppercase tracking-wider">{st("fail2ban.totalBans")}</p>
-                      <span className="font-bold text-orange-500">
-                        {f2bDetails.jails.reduce((a, j) => a + j.total_banned, 0)}
-                      </span>
                     </div>
-                    <div className="w-px h-4 bg-border" />
+                    <div className="p-3 bg-yellow-500/5 rounded-lg border border-yellow-500/20 text-center">
-                    <div className="flex items-center gap-1.5 text-sm">
+                      <p className="text-lg font-bold text-yellow-500">{f2bDetails.jails.reduce((a, j) => a + j.total_failed, 0)}</p>
-                      <span className="text-muted-foreground">{st("fail2ban.failedAttempts")}:</span>
+                      <p className="text-[10px] text-yellow-500/70 uppercase tracking-wider">{st("fail2ban.failedAttempts")}</p>
-                      <span className="font-bold text-yellow-500">
-                        {f2bDetails.jails.reduce((a, j) => a + j.total_failed, 0)}
-                      </span>
                     </div>
                   </div>
 

AppImage/messages/en/common.json

@@ -1502,6 +1502,9 @@
       "auditFailed": "Audit failed",
       "startAuditFailed": "Failed to start audit",
       "updateJailConfigFailed": "Failed to save protection settings",
+      "invalidTrustedNetwork": "Enter one valid IP address or CIDR network.",
+      "trustedNetworkExists": "This IP address or network is already trusted.",
+      "updateTrustedNetworksFailed": "Failed to update trusted IP addresses and networks.",
       "ruleNeedsPortOrSource": "Add a destination port or source address first.",
       "addRuleFailed": "Failed to add rule",
       "deleteRuleFailed": "Failed to delete rule",
@@ -1537,6 +1540,9 @@
       "missingJailsApplied": "Missing protections were added.",
       "auditCompleted": "Lynis audit completed.",
       "jailConfigUpdated": "Protection settings were saved.",
+      "trustedNetworkAdded": "{value} is now trusted by Fail2Ban.",
+      "trustedNetworkRemoved": "{value} was removed from trusted networks.",
+      "trustedNetworkUpdated": "Trusted entry was changed to {value}.",
       "ruleAdded": "Firewall rule was added.",
       "ruleDeleted": "Firewall rule was deleted.",
       "ruleUpdated": "Firewall rule was updated.",
@@ -1825,6 +1831,33 @@
         "maxRetries": "5",
         "banTime": "3600",
         "findTime": "600"
+      },
+      "trustedNetworks": {
+        "title": "Trusted IP addresses and networks",
+        "description": "Fail2Ban will never block these addresses.",
+        "required": "Required",
+        "remove": "Remove from trusted networks",
+        "placeholder": "192.168.1.25 or 192.168.1.0/24",
+        "add": "Add",
+        "addCurrent": "Add my IP ({ip})",
+        "addRule": "Add address / network",
+        "addressOrNetwork": "IP address or CIDR network",
+        "example": "One address: 192.168.1.25 · Entire network: 192.168.1.0/24",
+        "useCurrent": "Use my current IP: {ip}",
+        "singleIp": "IP address",
+        "network": "Network",
+        "edit": "Edit",
+        "delete": "Delete",
+        "save": "Save changes",
+        "trusted": "Trusted",
+        "system": "System",
+        "columns": {
+          "status": "Status",
+          "type": "Type",
+          "address": "Address / network",
+          "actions": "Actions"
+        },
+        "warning": "Trust only addresses you control. If you trust a whole network, Fail2Ban will also ignore a compromised device in that network."
       }
     },
     "lynis": {

AppImage/messages/sk/common.json

@@ -1502,6 +1502,9 @@
       "auditFailed": "Audit zlyhal",
       "startAuditFailed": "Nepodarilo sa spustiť audit",
       "updateJailConfigFailed": "Nepodarilo sa uložiť nastavenie ochrany",
+      "invalidTrustedNetwork": "Zadajte jednu platnú IP adresu alebo sieť v tvare CIDR.",
+      "trustedNetworkExists": "Táto IP adresa alebo sieť už je medzi dôveryhodnými.",
+      "updateTrustedNetworksFailed": "Nepodarilo sa upraviť dôveryhodné IP adresy a siete.",
       "ruleNeedsPortOrSource": "Najprv zadajte cieľový port alebo zdrojovú adresu.",
       "addRuleFailed": "Nepodarilo sa pridať pravidlo",
       "deleteRuleFailed": "Nepodarilo sa vymazať pravidlo",
@@ -1537,6 +1540,9 @@
       "missingJailsApplied": "Chýbajúce ochrany boli doplnené.",
       "auditCompleted": "Lynis audit je hotový.",
       "jailConfigUpdated": "Nastavenie ochrany bolo uložené.",
+      "trustedNetworkAdded": "Fail2Ban už nebude blokovať {value}.",
+      "trustedNetworkRemoved": "{value} bola odstránená z dôveryhodných sietí.",
+      "trustedNetworkUpdated": "Dôveryhodná položka bola zmenená na {value}.",
       "ruleAdded": "Firewall pravidlo bolo pridané.",
       "ruleDeleted": "Firewall pravidlo bolo vymazané.",
       "ruleUpdated": "Firewall pravidlo bolo upravené.",
@@ -1825,6 +1831,33 @@
         "maxRetries": "5",
         "banTime": "3600",
         "findTime": "600"
+      },
+      "trustedNetworks": {
+        "title": "Dôveryhodné IP adresy a siete",
+        "description": "Tieto adresy Fail2Ban nikdy nezablokuje.",
+        "required": "Povinné",
+        "remove": "Odstrániť z dôveryhodných sietí",
+        "placeholder": "192.168.1.25 alebo 192.168.1.0/24",
+        "add": "Pridať",
+        "addCurrent": "Pridať moju IP ({ip})",
+        "addRule": "Pridať adresu / sieť",
+        "addressOrNetwork": "IP adresa alebo sieť v tvare CIDR",
+        "example": "Jedna adresa: 192.168.1.25 · Celá sieť: 192.168.1.0/24",
+        "useCurrent": "Použiť moju aktuálnu IP: {ip}",
+        "singleIp": "IP adresa",
+        "network": "Sieť",
+        "edit": "Upraviť",
+        "delete": "Vymazať",
+        "save": "Uložiť zmeny",
+        "trusted": "Dôveryhodná",
+        "system": "Systémová",
+        "columns": {
+          "status": "Stav",
+          "type": "Typ",
+          "address": "Adresa / sieť",
+          "actions": "Akcie"
+        },
+        "warning": "Dôverujte iba adresám, ktoré máte pod kontrolou. Pri celej sieti bude Fail2Ban ignorovať aj napadnuté zariadenie v tejto sieti."
       }
     },
     "lynis": {

AppImage/scripts/flask_security_routes.py

@@ -5,6 +5,8 @@ ProxMenux Security Routes
 Flask blueprint for firewall management and security tool detection.
 """
 
+import ipaddress
+
 from flask import Blueprint, jsonify, request
 from jwt_middleware import require_auth
 
@@ -234,6 +236,80 @@ def fail2ban_jail_config():
         return jsonify({"success": False, "message": str(e)}), 500
 
 
+@security_bp.route('/api/security/fail2ban/trusted-networks', methods=['GET'])
+@require_auth
+def fail2ban_trusted_networks():
+    """List global IP/CIDR addresses excluded from all Fail2Ban jails."""
+    if not security_manager:
+        return jsonify({"success": False, "message": "Security manager not available"}), 500
+    try:
+        detected_ip = request.remote_addr
+        try:
+            parsed_ip = ipaddress.ip_address(detected_ip) if detected_ip else None
+            if isinstance(parsed_ip, ipaddress.IPv6Address) and parsed_ip.ipv4_mapped:
+                parsed_ip = parsed_ip.ipv4_mapped
+            if not parsed_ip or parsed_ip.is_loopback:
+                detected_ip = None
+            else:
+                detected_ip = str(parsed_ip)
+        except ValueError:
+            detected_ip = None
+        return jsonify({
+            "success": True,
+            "entries": security_manager.get_fail2ban_trusted_networks(),
+            "detected_ip": detected_ip,
+        })
+    except Exception as e:
+        return jsonify({"success": False, "message": str(e)}), 500
+
+
+@security_bp.route('/api/security/fail2ban/trusted-networks', methods=['POST'])
+@require_auth
+def fail2ban_add_trusted_network():
+    """Add one global Fail2Ban IP/CIDR exclusion."""
+    if not security_manager:
+        return jsonify({"success": False, "message": "Security manager not available"}), 500
+    try:
+        data = request.json or {}
+        success, message, value = security_manager.add_fail2ban_trusted_network(data.get("value", ""))
+        status = 200 if success else 400
+        return jsonify({"success": success, "message": message, "value": value}), status
+    except Exception as e:
+        return jsonify({"success": False, "message": str(e)}), 500
+
+
+@security_bp.route('/api/security/fail2ban/trusted-networks', methods=['DELETE'])
+@require_auth
+def fail2ban_remove_trusted_network():
+    """Remove one user-managed global Fail2Ban IP/CIDR exclusion."""
+    if not security_manager:
+        return jsonify({"success": False, "message": "Security manager not available"}), 500
+    try:
+        data = request.json or {}
+        success, message = security_manager.remove_fail2ban_trusted_network(data.get("value", ""))
+        status = 200 if success else 400
+        return jsonify({"success": success, "message": message}), status
+    except Exception as e:
+        return jsonify({"success": False, "message": str(e)}), 500
+
+
+@security_bp.route('/api/security/fail2ban/trusted-networks', methods=['PUT'])
+@require_auth
+def fail2ban_update_trusted_network():
+    """Replace one user-managed global Fail2Ban IP/CIDR exclusion."""
+    if not security_manager:
+        return jsonify({"success": False, "message": "Security manager not available"}), 500
+    try:
+        data = request.json or {}
+        success, message, value = security_manager.update_fail2ban_trusted_network(
+            data.get("old_value", ""), data.get("new_value", "")
+        )
+        status = 200 if success else 400
+        return jsonify({"success": success, "message": message, "value": value}), status
+    except Exception as e:
+        return jsonify({"success": False, "message": str(e)}), 500
+
+
 @security_bp.route('/api/security/fail2ban/apply-jails', methods=['POST'])
 @require_auth
 def fail2ban_apply_jails():

AppImage/scripts/security_manager.py

@@ -11,6 +11,8 @@ import subprocess
 import re
 import fcntl
 import threading
+import ipaddress
+import tempfile
 from contextlib import contextmanager
 
 # =================================================================
@@ -80,6 +82,10 @@ def _is_pve_rule_line(stripped):
 # and quote/escape tricks. See audit Tier 1 #12b.
 _JAIL_NAME_RE = re.compile(r'^[A-Za-z0-9_][A-Za-z0-9_-]{0,63}$')
 
+FAIL2BAN_TRUSTED_NETWORKS_FILE = "/etc/fail2ban/jail.d/99-proxmenux-ignore.local"
+FAIL2BAN_LEGACY_GLOBAL_FILE = "/etc/fail2ban/jail.local"
+_FAIL2BAN_PROTECTED_NETWORKS = ("127.0.0.0/8", "::1")
+
 # Whitelist for the `level` argument to firewall functions. The audit flagged
 # that an unconstrained value here could one day be extended to `vm` and become
 # a path traversal sink. See audit Tier 1 #12d.
@@ -924,6 +930,192 @@ def classify_ip(ip_address):
     return "external"
 
 
+def _normalise_ip_or_network(value):
+    """Return a canonical IP/CIDR string, or raise ValueError."""
+    if not isinstance(value, str):
+        raise ValueError("Enter an IP address or CIDR network")
+    candidate = value.strip()
+    if not candidate or len(candidate) > 128 or any(ch.isspace() for ch in candidate):
+        raise ValueError("Enter one IP address or CIDR network at a time")
+    try:
+        if "/" in candidate:
+            parsed = ipaddress.ip_network(candidate, strict=False)
+            if parsed.prefixlen == 0 or parsed.is_multicast or parsed.is_unspecified:
+                raise ValueError
+            return parsed.with_prefixlen
+        parsed = ipaddress.ip_address(candidate)
+        if parsed.is_multicast or parsed.is_unspecified:
+            raise ValueError
+        return str(parsed)
+    except ValueError:
+        raise ValueError("Invalid IP address or CIDR network")
+
+
+def _parse_default_ignoreip(path):
+    """Read ignoreip values from the [DEFAULT] section of one config file."""
+    if not os.path.isfile(path):
+        return []
+    values = []
+    in_default = False
+    try:
+        with open(path, "r") as config_file:
+            for raw_line in config_file:
+                stripped = raw_line.strip()
+                if stripped.startswith("[") and stripped.endswith("]"):
+                    in_default = stripped.upper() == "[DEFAULT]"
+                    continue
+                if not in_default or not stripped or stripped.startswith(("#", ";")):
+                    continue
+                match = re.match(r"^ignoreip\s*=\s*(.*)$", stripped, re.IGNORECASE)
+                if match:
+                    raw_values = re.split(r"[\s,]+", match.group(1).strip())
+                    values.extend(value for value in raw_values if value)
+    except OSError:
+        return []
+    return values
+
+
+def _trusted_network_entries():
+    source = (FAIL2BAN_TRUSTED_NETWORKS_FILE
+              if os.path.isfile(FAIL2BAN_TRUSTED_NETWORKS_FILE)
+              else FAIL2BAN_LEGACY_GLOBAL_FILE)
+    entries = []
+    for value in (*_FAIL2BAN_PROTECTED_NETWORKS, *_parse_default_ignoreip(source)):
+        try:
+            normalised = _normalise_ip_or_network(value)
+        except ValueError:
+            continue
+        if normalised not in entries:
+            entries.append(normalised)
+    return entries
+
+
+def get_fail2ban_trusted_networks():
+    """Return the global Fail2Ban IP/CIDR allowlist managed by the Monitor."""
+    protected = {_normalise_ip_or_network(value) for value in _FAIL2BAN_PROTECTED_NETWORKS}
+    return [
+        {"value": value, "protected": value in protected}
+        for value in _trusted_network_entries()
+    ]
+
+
+def _write_trusted_networks(entries):
+    target = FAIL2BAN_TRUSTED_NETWORKS_FILE
+    directory = os.path.dirname(target)
+    os.makedirs(directory, exist_ok=True)
+    content = (
+        "# Managed by ProxMenux Monitor. Use the Security page to edit.\n"
+        "[DEFAULT]\n"
+        f"ignoreip = {' '.join(entries)}\n"
+        "ignoreself = true\n"
+    )
+    temp_path = None
+    try:
+        with tempfile.NamedTemporaryFile(
+            mode="w", dir=directory, prefix=".proxmenux-ignore-", delete=False
+        ) as temp_file:
+            temp_file.write(content)
+            temp_path = temp_file.name
+        os.chmod(temp_path, 0o640)
+        os.replace(temp_path, target)
+    finally:
+        if temp_path and os.path.exists(temp_path):
+            os.unlink(temp_path)
+
+
+def _save_trusted_networks(entries):
+    """Persist and reload atomically; restore the previous file on failure."""
+    target = FAIL2BAN_TRUSTED_NETWORKS_FILE
+    lock_path = target + ".lock"
+    with _exclusive_file_lock(lock_path):
+        previous = None
+        existed = os.path.isfile(target)
+        if existed:
+            with open(target, "rb") as current_file:
+                previous = current_file.read()
+
+        _write_trusted_networks(entries)
+        rc, _, err = _run_cmd(["fail2ban-client", "reload"])
+        if rc == 0:
+            return True, "Fail2Ban trusted networks updated"
+
+        try:
+            if existed:
+                with open(target, "wb") as restore_file:
+                    restore_file.write(previous or b"")
+            elif os.path.exists(target):
+                os.unlink(target)
+            _run_cmd(["fail2ban-client", "reload"])
+        except OSError:
+            pass
+        return False, f"Fail2Ban rejected the configuration: {err or 'reload failed'}"
+
+
+def add_fail2ban_trusted_network(value):
+    try:
+        normalised = _normalise_ip_or_network(value)
+    except ValueError as exc:
+        return False, str(exc), None
+
+    entries = _trusted_network_entries()
+    candidate_network = ipaddress.ip_network(normalised, strict=False)
+    if any(
+        candidate_network.version == ipaddress.ip_network(entry, strict=False).version
+        and candidate_network.subnet_of(ipaddress.ip_network(entry, strict=False))
+        for entry in entries
+    ):
+        return False, "This IP address or network is already trusted", normalised
+    entries.append(normalised)
+    success, message = _save_trusted_networks(entries)
+    return success, message, normalised
+
+
+def remove_fail2ban_trusted_network(value):
+    try:
+        normalised = _normalise_ip_or_network(value)
+    except ValueError as exc:
+        return False, str(exc)
+
+    protected = {_normalise_ip_or_network(item) for item in _FAIL2BAN_PROTECTED_NETWORKS}
+    if normalised in protected:
+        return False, "Required local addresses cannot be removed"
+
+    entries = _trusted_network_entries()
+    if normalised not in entries:
+        return False, "Trusted IP address or network was not found"
+    entries.remove(normalised)
+    return _save_trusted_networks(entries)
+
+
+def update_fail2ban_trusted_network(old_value, new_value):
+    try:
+        old_normalised = _normalise_ip_or_network(old_value)
+        new_normalised = _normalise_ip_or_network(new_value)
+    except ValueError as exc:
+        return False, str(exc), None
+
+    protected = {_normalise_ip_or_network(item) for item in _FAIL2BAN_PROTECTED_NETWORKS}
+    if old_normalised in protected:
+        return False, "Required local addresses cannot be changed", None
+
+    entries = _trusted_network_entries()
+    if old_normalised not in entries:
+        return False, "Trusted IP address or network was not found", None
+
+    other_entries = [entry for entry in entries if entry != old_normalised]
+    candidate_network = ipaddress.ip_network(new_normalised, strict=False)
+    if any(
+        candidate_network.version == ipaddress.ip_network(entry, strict=False).version
+        and candidate_network.subnet_of(ipaddress.ip_network(entry, strict=False))
+        for entry in other_entries
+    ):
+        return False, "This IP address or network is already trusted", new_normalised
+
+    entries[entries.index(old_normalised)] = new_normalised
+    success, message = _save_trusted_networks(entries)
+    return success, message, new_normalised
+
+
 def update_jail_config(jail_name, maxretry=None, bantime=None, findtime=None):
     """
     Update Fail2Ban jail configuration (maxretry, bantime, findtime).

AppImage/scripts/tests/test_fail2ban_trusted_networks.py

@@ -0,0 +1,172 @@
+import importlib.util
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+
+MODULE_PATH = Path(__file__).resolve().parents[1] / "security_manager.py"
+SPEC = importlib.util.spec_from_file_location("security_manager_under_test", MODULE_PATH)
+security_manager = importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(security_manager)
+
+
+class Fail2BanTrustedNetworksTests(unittest.TestCase):
+    def setUp(self):
+        self.temp_dir = tempfile.TemporaryDirectory()
+        self.addCleanup(self.temp_dir.cleanup)
+        root = Path(self.temp_dir.name)
+        self.managed_file = root / "jail.d" / "99-proxmenux-ignore.local"
+        self.legacy_file = root / "jail.local"
+        self.paths_patch = mock.patch.multiple(
+            security_manager,
+            FAIL2BAN_TRUSTED_NETWORKS_FILE=str(self.managed_file),
+            FAIL2BAN_LEGACY_GLOBAL_FILE=str(self.legacy_file),
+        )
+        self.paths_patch.start()
+        self.addCleanup(self.paths_patch.stop)
+        self.command_patch = mock.patch.object(
+            security_manager, "_run_cmd", return_value=(0, "OK", "")
+        )
+        self.run_command = self.command_patch.start()
+        self.addCleanup(self.command_patch.stop)
+
+    def write_legacy(self, content):
+        self.legacy_file.write_text(content)
+
+    def test_reads_and_normalises_existing_global_entries(self):
+        self.write_legacy(
+            "[DEFAULT]\nignoreip = 127.0.0.1/8, ::1 192.168.10.15 10.1.2.9/24\n"
+            "\n[sshd]\nenabled = true\n"
+        )
+
+        entries = security_manager.get_fail2ban_trusted_networks()
+
+        self.assertEqual(
+            [entry["value"] for entry in entries],
+            ["127.0.0.0/8", "::1", "192.168.10.15", "10.1.2.0/24"],
+        )
+        self.assertTrue(entries[0]["protected"])
+        self.assertTrue(entries[1]["protected"])
+        self.assertFalse(entries[2]["protected"])
+
+    def test_adds_ipv4_network_and_reloads_fail2ban(self):
+        success, message, value = security_manager.add_fail2ban_trusted_network(
+            "192.168.50.123/24"
+        )
+
+        self.assertTrue(success, message)
+        self.assertEqual(value, "192.168.50.0/24")
+        content = self.managed_file.read_text()
+        self.assertIn("ignoreip = 127.0.0.0/8 ::1 192.168.50.0/24", content)
+        self.run_command.assert_called_once_with(["fail2ban-client", "reload"])
+
+    def test_adds_ipv6_network(self):
+        success, message, value = security_manager.add_fail2ban_trusted_network(
+            "fd12:3456:789a::42/64"
+        )
+
+        self.assertTrue(success, message)
+        self.assertEqual(value, "fd12:3456:789a::/64")
+
+    def test_rejects_invalid_or_multiple_values_without_writing(self):
+        for value in ("not-an-ip", "10.0.0.1 10.0.0.2", "10.0.0.0/99"):
+            with self.subTest(value=value):
+                success, _, normalised = security_manager.add_fail2ban_trusted_network(value)
+                self.assertFalse(success)
+                self.assertIsNone(normalised)
+
+        self.assertFalse(self.managed_file.exists())
+        self.run_command.assert_not_called()
+
+    def test_duplicate_is_rejected(self):
+        self.write_legacy("[DEFAULT]\nignoreip = 10.0.0.0/24\n")
+
+        success, message, value = security_manager.add_fail2ban_trusted_network("10.0.0.9/24")
+
+        self.assertFalse(success)
+        self.assertIn("already trusted", message)
+        self.assertEqual(value, "10.0.0.0/24")
+        self.run_command.assert_not_called()
+
+    def test_address_already_covered_by_network_is_rejected(self):
+        self.write_legacy("[DEFAULT]\nignoreip = 10.0.0.0/24\n")
+
+        success, message, value = security_manager.add_fail2ban_trusted_network("10.0.0.42")
+
+        self.assertFalse(success)
+        self.assertIn("already trusted", message)
+        self.assertEqual(value, "10.0.0.42")
+
+    def test_rejects_network_that_would_disable_all_bans(self):
+        for value in ("0.0.0.0/0", "::/0"):
+            with self.subTest(value=value):
+                success, _, normalised = security_manager.add_fail2ban_trusted_network(value)
+                self.assertFalse(success)
+                self.assertIsNone(normalised)
+
+    def test_protected_network_cannot_be_removed(self):
+        success, message = security_manager.remove_fail2ban_trusted_network("127.0.0.1/8")
+
+        self.assertFalse(success)
+        self.assertIn("cannot be removed", message)
+        self.run_command.assert_not_called()
+
+    def test_removes_user_network_and_keeps_other_entries(self):
+        self.managed_file.parent.mkdir(parents=True)
+        self.managed_file.write_text(
+            "[DEFAULT]\nignoreip = 127.0.0.0/8 ::1 10.0.0.0/24 192.168.1.5\n"
+        )
+
+        success, message = security_manager.remove_fail2ban_trusted_network("10.0.0.0/24")
+
+        self.assertTrue(success, message)
+        content = self.managed_file.read_text()
+        self.assertNotIn("10.0.0.0/24", content)
+        self.assertIn("192.168.1.5", content)
+
+    def test_updates_user_network_in_place(self):
+        self.managed_file.parent.mkdir(parents=True)
+        self.managed_file.write_text(
+            "[DEFAULT]\nignoreip = 127.0.0.0/8 ::1 10.0.0.0/24 192.168.1.5\n"
+        )
+
+        success, message, value = security_manager.update_fail2ban_trusted_network(
+            "10.0.0.0/24", "10.20.30.99/24"
+        )
+
+        self.assertTrue(success, message)
+        self.assertEqual(value, "10.20.30.0/24")
+        content = self.managed_file.read_text()
+        self.assertNotIn("10.0.0.0/24", content)
+        self.assertIn("10.20.30.0/24", content)
+        self.assertIn("192.168.1.5", content)
+
+    def test_protected_network_cannot_be_updated(self):
+        success, message, value = security_manager.update_fail2ban_trusted_network(
+            "::1", "::2"
+        )
+
+        self.assertFalse(success)
+        self.assertIn("cannot be changed", message)
+        self.assertIsNone(value)
+
+    def test_reload_failure_restores_previous_file(self):
+        self.managed_file.parent.mkdir(parents=True)
+        original = "[DEFAULT]\nignoreip = 127.0.0.0/8 ::1 10.0.0.0/24\n"
+        self.managed_file.write_text(original)
+        self.run_command.side_effect = [
+            (1, "", "configuration error"),
+            (0, "OK", ""),
+        ]
+
+        success, message, _ = security_manager.add_fail2ban_trusted_network("192.168.1.0/24")
+
+        self.assertFalse(success)
+        self.assertIn("configuration error", message)
+        self.assertEqual(self.managed_file.read_text(), original)
+        self.assertEqual(self.run_command.call_count, 2)
+
+
+if __name__ == "__main__":
+    unittest.main()