fix: settings update fixed + packet invalid drop

backend/modules/firewall/firewall.py

@@ -38,17 +38,19 @@ class FirewallManager:
                 allow_established=self.allow_established,
                 allow_icmp=self.allow_icmp,
                 multicast_dns=self.multicast_dns,
-                allow_upnp=self.allow_upnp
+                allow_upnp=self.allow_upnp,
+                drop_invalid=self.drop_invalid
             )
     
     @settings.setter
     def settings(self, value:FirewallSettings):
-        self.keep_rules=value.keep_rules,
-        self.allow_loopback=value.allow_loopback,
-        self.allow_established=value.allow_established,
-        self.allow_icmp=value.allow_icmp,
-        self.multicast_dns=value.multicast_dns,
+        self.keep_rules = value.keep_rules
+        self.allow_loopback=value.allow_loopback
+        self.allow_established=value.allow_established
+        self.allow_icmp=value.allow_icmp
+        self.multicast_dns=value.multicast_dns
         self.allow_upnp=value.allow_upnp
+        self.drop_invalid=value.drop_invalid
 
     @property
     def policy(self):
@@ -114,3 +116,11 @@ class FirewallManager:
     def allow_upnp(self, value):
         self.db.set("allow_upnp", "1" if value else "0")
     
+    @property
+    def drop_invalid(self):
+        return self.db.get("drop_invalid", "1") == "1"
+    
+    @drop_invalid.setter
+    def drop_invalid(self, value):
+        self.db.set("drop_invalid", "1" if value else "0")
+    

backend/modules/firewall/models.py

@@ -69,3 +69,4 @@ class FirewallSettings(BaseModel):
     allow_icmp: bool
     multicast_dns: bool
     allow_upnp: bool
+    drop_invalid: bool

backend/modules/firewall/nftables.py

@@ -8,8 +8,8 @@ class FiregexTables(NFTableManager):
     rules_chain_fwd = "firegex_firewall_rules_fwd"
     filter_table = "filter"
     
-    def init_comands(self, policy:str=Action.ACCEPT, opt: FirewallSettings = None):
-        return [
+    def init_comands(self, policy:str=Action.ACCEPT, opt: FirewallSettings|None = None):
+        rules = [
             {"add":{"table":{"name":self.filter_table,"family":"ip"}}},
             {"add":{"table":{"name":self.filter_table,"family":"ip6"}}},
             
@@ -26,7 +26,11 @@ class FiregexTables(NFTableManager):
             {"add":{"chain":{"family":"ip6","table":self.filter_table,"name":self.rules_chain_out}}},
             {"add":{"chain":{"family":"ip","table":self.filter_table,"name":self.rules_chain_fwd}}},
             {"add":{"chain":{"family":"ip6","table":self.filter_table,"name":self.rules_chain_fwd}}},
-        ] + (([
+        ]
+        if opt is None: return rules
+        
+        if opt.allow_loopback:
+            rules.extend([
                 { "add":{ "rule": {
                     "family": "ip", "table": self.filter_table, "chain": self.rules_chain_out,
                     "expr": [{ "match": { "op": "==", "left": { "meta": { "key": "iif" }}, "right": "lo"}},{"accept": None}]
@@ -43,32 +47,39 @@ class FiregexTables(NFTableManager):
                     "family": "ip6", "table": self.filter_table, "chain": self.rules_chain_in,
                     "expr": [{ "match": { "op": "==", "left": { "meta": { "key": "iif" }}, "right": "lo"}},{"accept": None}]
                 }}}
-        ] if opt.allow_loopback else []) + ([
+            ])
+        if opt.allow_established:
+            rules.extend([
                 { "add":{ "rule": {
                     "family": "ip", "table": self.filter_table, "chain": self.rules_chain_in,
-                "expr": [{ "match": {"op": "in", "left": { "ct": { "key": "state" }},"right": ["established", "related"]} }, { "accept": None }]
+                    "expr": [{ "match": {"op": "in", "left": { "ct": { "key": "state" }},"right": ["related", "established"]} },{ "accept": None }]
                 }}},
                 { "add":{ "rule": {
                     "family": "ip", "table": self.filter_table, "chain": self.rules_chain_fwd,
-                "expr": [{ "match": {"op": "in", "left": { "ct": { "key": "state" }},"right": ["established", "related"]} }, { "accept": None }]
-            }}},
-            { "add":{ "rule": {
-                "family": "ip", "table": self.filter_table, "chain": self.rules_chain_out,
-                "expr": [{ "match": {"op": "in", "left": { "ct": { "key": "state" }},"right": ["established", "related"]} }, { "accept": None }]
+                    "expr": [{ "match": {"op": "in", "left": { "ct": { "key": "state" }},"right": ["related", "established"]} },{ "accept": None }]
                 }}},
                 { "add":{ "rule": {
                     "family": "ip6", "table": self.filter_table, "chain": self.rules_chain_in,
-                "expr": [{ "match": {"op": "in", "left": { "ct": { "key": "state" }},"right": ["established", "related"]} }, { "accept": None }]
+                    "expr": [{ "match": {"op": "in", "left": { "ct": { "key": "state" }},"right": ["related", "established"]} },{ "accept": None }]
                 }}},
                 { "add":{ "rule": {
                     "family": "ip6", "table": self.filter_table, "chain": self.rules_chain_fwd,
-                "expr": [{ "match": {"op": "in", "left": { "ct": { "key": "state" }},"right": ["established", "related"]} }, { "accept": None }]
+                    "expr": [{ "match": {"op": "in", "left": { "ct": { "key": "state" }},"right": ["related", "established"]} },{ "accept": None }]
+                }}}
+            ])
+        if opt.drop_invalid:
+            rules.extend([
+                { "add":{ "rule": {
+                    "family": "ip", "table": self.filter_table, "chain": self.rules_chain_in,
+                    "expr": [{ "match": {"op": "==", "left": { "ct": { "key": "state" }},"right": "invalid"} },{ "drop": None }]
                 }}},
                 { "add":{ "rule": {
-                "family": "ip6", "table": self.filter_table, "chain": self.rules_chain_out,
-                "expr": [{ "match": {"op": "in", "left": { "ct": { "key": "state" }},"right": ["established", "related"]} }, { "accept": None }]
+                    "family": "ip6", "table": self.filter_table, "chain": self.rules_chain_in,
+                    "expr": [{ "match": {"op": "==", "left": { "ct": { "key": "state" }},"right": "invalid"} },{ "drop": None }]
                 }}}
-        ] if opt.allow_established else []) + ([
+            ])
+        if opt.allow_icmp:
+            rules.extend([
                 { "add":{ "rule": {
                     "family": "ip", "table": self.filter_table, "chain": self.rules_chain_in,
                     "expr": [{ "match": { "op": "==", "left": { "meta": { "key": "l4proto" } }, "right": "icmp"} },{ "accept": None }]
@@ -85,7 +96,9 @@ class FiregexTables(NFTableManager):
                     "family": "ip6", "table": self.filter_table, "chain": self.rules_chain_fwd,
                     "expr": [{ "match": { "op": "==", "left": { "meta": { "key": "l4proto" } }, "right": "ipv6-icmp"} },{ "accept": None }]
                 }}}
-        ] if opt.allow_icmp else []) + ([
+            ])
+        if opt.multicast_dns:
+            rules.extend([
                 { "add":{ "rule": {
                     "family": "ip", "table": self.filter_table, "chain": self.rules_chain_in,
                     "expr": [
@@ -102,7 +115,9 @@ class FiregexTables(NFTableManager):
                         { "accept": None }
                     ]
                 }}},
-        ] if opt.multicast_dns else []) + ([
+            ])
+        if opt.allow_upnp:
+            rules.extend([
                 { "add":{ "rule": {
                     "family": "ip", "table": self.filter_table, "chain": self.rules_chain_in,
                     "expr": [
@@ -119,7 +134,8 @@ class FiregexTables(NFTableManager):
                         { "accept": None }
                     ]
                 }}},
-        ] if opt.allow_upnp else [])) if opt else []
+            ])
+        return rules
     
     def __init__(self):
         super().__init__(self.init_comands(),[

frontend/src/components/Firewall/utils.ts

@@ -52,7 +52,8 @@ export type FirewallSettings = {
     allow_established: boolean,
     allow_icmp: boolean,
     multicast_dns: boolean,
-    allow_upnp: boolean
+    allow_upnp: boolean,
+    drop_invalid: boolean
 }
 
 

frontend/src/pages/Firewall/SettingsModal.tsx

@@ -5,7 +5,7 @@ import { FirewallSettings, firewall } from '../../components/Firewall/utils';
 
 export function SettingsModal({ opened, onClose }:{ opened:boolean, onClose:()=>void }) {
 
-    const [settings, setSettings] = useState<FirewallSettings>({keep_rules:false, allow_established:true, allow_loopback:true, allow_icmp:true, allow_upnp:true, multicast_dns:true})
+    const [settings, setSettings] = useState<FirewallSettings>({} as FirewallSettings)
 
     useEffect(()=>{
         firewall.settings().then( res => {
@@ -44,6 +44,8 @@ export function SettingsModal({ opened, onClose }:{ opened:boolean, onClose:()=>
             <Switch label="Allow multicast DNS" checked={settings.multicast_dns} onChange={v => setSettings({...settings, multicast_dns:v.target.checked})}/>
             <Space h="md" />
             <Switch label="Allow UPnP protocol" checked={settings.allow_upnp} onChange={v => setSettings({...settings, allow_upnp:v.target.checked})}/>
+            <Space h="md" />
+            <Switch label="Drop invalid packet" checked={settings.drop_invalid} onChange={v => setSettings({...settings, drop_invalid:v.target.checked})}/>
 
             <Group position="right" mt="md">
                 <Button loading={submitLoading} onClick={submitRequest}>Save Setting</Button>