diff --git a/tools/lib/filereader.py b/tools/lib/filereader.py
index 8206ad2228..6773d5a599 100644
--- a/tools/lib/filereader.py
+++ b/tools/lib/filereader.py
@@ -5,12 +5,15 @@ from urllib.parse import urlparse
 from openpilot.tools.lib.url_file import URLFile
 
 DATA_ENDPOINT = os.getenv("DATA_ENDPOINT", "http://data-raw.comma.internal/")
+LOCAL_IPS = ["10.", "192.168.", *[f"172.{i}" for i in range(16, 32)]]
 
 
 def internal_source_available(url=DATA_ENDPOINT):
   try:
     hostname = urlparse(url).hostname
     port = urlparse(url).port or 80
+    if not socket.gethostbyname(hostname).startswith(LOCAL_IPS):
+      return False
     with socket.socket(socket.AF_INET,socket.SOCK_STREAM) as s:
       s.settimeout(0.5)
       s.connect((hostname, port))