netfilter: improve logging and mark iptables-legacy as deprecated

data/Dockerfiles/netfilter/docker-entrypoint.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-backend=iptables
+backend=nftables
 
 nft list table ip filter &>/dev/null
 nftables_found=$?

data/Dockerfiles/netfilter/main.py

@@ -449,6 +449,11 @@ if __name__ == '__main__':
     tables = NFTables(chain_name, logger)
   else:
     logger.logInfo('Using IPTables backend')
+    logger.logWarn(
+        "DEPRECATION: iptables-legacy is deprecated and will be removed in future releases. "
+        "Please switch to nftables on your host to ensure complete compatibility."
+    )
+    time.sleep(5)
     tables = IPTables(chain_name, logger)
 
   clear()

data/Dockerfiles/netfilter/modules/Logger.py

@@ -1,5 +1,6 @@
 import time
 import json
+import datetime
 
 class Logger:
   def __init__(self):
@@ -8,17 +9,28 @@ class Logger:
   def set_redis(self, redis):
     self.r = redis
 
+  def _format_timestamp(self):
+    # Local time with milliseconds
+    return datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+
   def log(self, priority, message):
-    tolog = {}
-    tolog['time'] = int(round(time.time()))
-    tolog['priority'] = priority
-    tolog['message'] = message
-    print(message)
+    # build redis-friendly dict
+    tolog = {
+      'time': int(round(time.time())),  # keep raw timestamp for Redis
+      'priority': priority,
+      'message': message
+    }
+
+    # print human-readable message with timestamp
+    ts = self._format_timestamp()
+    print(f"{ts} {priority.upper()}: {message}", flush=True)
+
+    # also push JSON to Redis if connected
     if self.r is not None:
       try:
         self.r.lpush('NETFILTER_LOG', json.dumps(tolog, ensure_ascii=False))
       except Exception as ex:
-        print('Failed logging to redis: %s'  % (ex))
+        print(f'{ts} WARN: Failed logging to redis: {ex}', flush=True)
 
   def logWarn(self, message):
     self.log('warn', message)
@@ -27,4 +39,4 @@ class Logger:
     self.log('crit', message)
 
   def logInfo(self, message):
-    self.log('info', message)
+    self.log('info', message)

docker-compose.yml

@@ -502,7 +502,7 @@ services:
             - acme
 
     netfilter-mailcow:
-      image: ghcr.io/mailcow/netfilter:1.62
+      image: ghcr.io/mailcow/netfilter:1.63
       stop_grace_period: 30s
       restart: always
       privileged: true