Check Google DNS for `is_online()` (#10095)

.github/workflows/ci.yaml

@@ -126,7 +126,7 @@ jobs:
         run: coverage run -a --source=ultralytics -m ultralytics.cfg.__init__ benchmark model='path with spaces/yolov8s-worldv2.pt' imgsz=160 verbose=0.318
       - name: Benchmark SegmentationModel
         shell: bash
-        run: coverage run -a --source=ultralytics -m ultralytics.cfg.__init__ benchmark model='path with spaces/${{ matrix.model }}-seg.pt' imgsz=160 verbose=0.280
+        run: coverage run -a --source=ultralytics -m ultralytics.cfg.__init__ benchmark model='path with spaces/${{ matrix.model }}-seg.pt' imgsz=160 verbose=0.279
       - name: Benchmark PoseModel
         shell: bash
         run: coverage run -a --source=ultralytics -m ultralytics.cfg.__init__ benchmark model='path with spaces/${{ matrix.model }}-pose.pt' imgsz=160 verbose=0.183

ultralytics/utils/__init__.py

@@ -512,8 +512,9 @@ def is_online() -> bool:
         assert str(os.getenv("YOLO_OFFLINE", "")).lower() != "true"  # check if ENV var YOLO_OFFLINE="True"
         import socket
 
-        socket.create_connection(address=("1.1.1.1", 80), timeout=1.0).close()  # check Cloudflare DNS
-        return True
+        for dns in ("1.1.1.1", "8.8.8.8"):  # check Cloudflare and Google DNS
+            socket.create_connection(address=(dns, 80), timeout=1.0).close()
+            return True
     return False