diff --git a/litellm/proxy/guardrails/guardrail_hooks/bedrock_guardrails.py b/litellm/proxy/guardrails/guardrail_hooks/bedrock_guardrails.py
index b0a075c89a0..5a5b0307fa9 100644
--- a/litellm/proxy/guardrails/guardrail_hooks/bedrock_guardrails.py
+++ b/litellm/proxy/guardrails/guardrail_hooks/bedrock_guardrails.py
@@ -737,9 +737,7 @@ class BedrockGuardrail(CustomGuardrail, BaseAWSLLM):
                 else model_id_deployment
             )
             candidate_deployments: Final = (
-                [model_id_deployment_row]
-                if model_id_deployment_row is not None
-                else team_filtered_deployments
+                [model_id_deployment_row] if model_id_deployment_row is not None else team_filtered_deployments
             )
 
             filter_deployments: Final = getattr(llm_router, "_filter_deployments_by_model_access_groups", None)
@@ -771,6 +769,37 @@ class BedrockGuardrail(CustomGuardrail, BaseAWSLLM):
             if blocked is not True:
                 active_deployments.append(deployment)
         if not active_deployments:
+            router_settings = getattr(llm_router, "router_general_settings", None)
+            if getattr(router_settings, "pass_through_all_models", False) is True:
+                provider = request_data.get("custom_llm_provider")
+                if not isinstance(provider, str):
+                    provider = BedrockGuardrail._resolve_model_provider(model) if isinstance(model, str) else None
+                return provider in ("bedrock", "bedrock_converse") if isinstance(provider, str) else None
+
+            default_deployment = getattr(llm_router, "default_deployment", None)
+            if default_deployment is not None:
+                default_params: object = (
+                    default_deployment.get("litellm_params")
+                    if isinstance(default_deployment, Mapping)
+                    else getattr(default_deployment, "litellm_params", None)
+                )
+                provider: object = (
+                    default_params.get("custom_llm_provider")
+                    if isinstance(default_params, Mapping)
+                    else getattr(default_params, "custom_llm_provider", None)
+                )
+                if not isinstance(provider, str):
+                    default_model: object = (
+                        default_params.get("model")
+                        if isinstance(default_params, Mapping)
+                        else getattr(default_params, "model", None)
+                    )
+                    provider = (
+                        BedrockGuardrail._resolve_model_provider(default_model)
+                        if isinstance(default_model, str)
+                        else None
+                    )
+                return provider in ("bedrock", "bedrock_converse") if isinstance(provider, str) else None
             return False
 
         providers: list[str] = []
@@ -808,11 +837,14 @@ class BedrockGuardrail(CustomGuardrail, BaseAWSLLM):
         if not isinstance(api_key, str):
             return None
 
+        explicit_provider: Final[object | None] = request_data.get("custom_llm_provider")
+        if isinstance(explicit_provider, str) and explicit_provider not in ("bedrock", "bedrock_converse"):
+            return None
+
         router_allows_bedrock: Final = BedrockGuardrail._router_allows_bedrock(request_data)
         if router_allows_bedrock is not None:
             return api_key if router_allows_bedrock else None
 
-        explicit_provider: Final[object | None] = request_data.get("custom_llm_provider")
         if isinstance(explicit_provider, str):
             return api_key if explicit_provider in ("bedrock", "bedrock_converse") else None
 
diff --git a/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_bedrock_guardrails.py b/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_bedrock_guardrails.py
index 13bbb15ef30..0340f83c9d3 100644
--- a/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_bedrock_guardrails.py
+++ b/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_bedrock_guardrails.py
@@ -82,6 +82,57 @@ def test_bedrock_guardrail_resolves_router_model_id():
     deployment.model_dump.assert_called_once_with(exclude_none=True)
 
 
+def test_bedrock_guardrail_accepts_pass_through_bedrock_provider(monkeypatch: pytest.MonkeyPatch):
+    from litellm.proxy import proxy_server
+
+    router = MagicMock()
+    router.get_model_list.return_value = []
+    router.router_general_settings.pass_through_all_models = True
+    router.default_deployment = None
+    monkeypatch.setattr(proxy_server, "llm_router", router)
+
+    request_data = {
+        "model": "amazon.nova-lite-v1:0",
+        "custom_llm_provider": "bedrock",
+        "api_key": "bedrock-key",
+    }
+    assert BedrockGuardrail._router_allows_bedrock(request_data) is True
+    assert BedrockGuardrail._get_bedrock_api_key(request_data) == "bedrock-key"
+
+
+def test_bedrock_guardrail_accepts_bedrock_default_deployment(monkeypatch: pytest.MonkeyPatch):
+    from litellm.proxy import proxy_server
+
+    router = MagicMock()
+    router.get_model_list.return_value = []
+    router.router_general_settings.pass_through_all_models = False
+    router.default_deployment = {"litellm_params": {"custom_llm_provider": "bedrock"}}
+    monkeypatch.setattr(proxy_server, "llm_router", router)
+
+    assert BedrockGuardrail._router_allows_bedrock({"model": "unlisted-model"}) is True
+
+
+def test_bedrock_guardrail_explicit_non_bedrock_provider_wins_alias(monkeypatch: pytest.MonkeyPatch):
+    from litellm.proxy import proxy_server
+
+    router = MagicMock()
+    router.get_model_list.return_value = [
+        {"litellm_params": {"custom_llm_provider": "bedrock"}, "model_info": {}}
+    ]
+    monkeypatch.setattr(proxy_server, "llm_router", router)
+
+    assert (
+        BedrockGuardrail._get_bedrock_api_key(
+            {
+                "model": "bedrock-alias",
+                "custom_llm_provider": "openai",
+                "api_key": "openai-key",
+            }
+        )
+        is None
+    )
+
+
 def test_bedrock_guardrail_filters_access_group_deployments():
     router = MagicMock()
     router.get_model_list.return_value = [