diff --git a/services/search/content.py b/services/search/content.py
index 290dc35..ff82a7f 100644
--- a/services/search/content.py
+++ b/services/search/content.py
@@ -39,7 +39,17 @@ _PRIVATE_NETWORKS = (
 
 
 def _is_private_address(addr: ipaddress._BaseAddress) -> bool:
-    return addr.is_private or addr.is_loopback or addr.is_link_local or any(addr in net for net in _PRIVATE_NETWORKS)
+    if isinstance(addr, ipaddress.IPv6Address) and addr.ipv4_mapped is not None:
+        addr = addr.ipv4_mapped
+    return (
+        addr.is_private
+        or addr.is_loopback
+        or addr.is_link_local
+        or addr.is_reserved
+        or addr.is_multicast
+        or addr.is_unspecified
+        or any(addr in net for net in _PRIVATE_NETWORKS)
+    )
 
 
 def _resolve_hostname_ips(hostname: str) -> list[ipaddress._BaseAddress]:
diff --git a/src/search/content.py b/src/search/content.py
index a7eddb4..42f8e34 100644
--- a/src/search/content.py
+++ b/src/search/content.py
@@ -39,7 +39,17 @@ _PRIVATE_NETWORKS = (
 
 
 def _is_private_address(addr: ipaddress._BaseAddress) -> bool:
-    return any(addr in net for net in _PRIVATE_NETWORKS) or addr.is_private or addr.is_loopback
+    if isinstance(addr, ipaddress.IPv6Address) and addr.ipv4_mapped is not None:
+        addr = addr.ipv4_mapped
+    return (
+        addr.is_private
+        or addr.is_loopback
+        or addr.is_link_local
+        or addr.is_reserved
+        or addr.is_multicast
+        or addr.is_unspecified
+        or any(addr in net for net in _PRIVATE_NETWORKS)
+    )
 
 
 def _resolve_hostname_ips(hostname: str) -> List[ipaddress._BaseAddress]:
@@ -57,6 +67,8 @@ def _public_http_url(url: str) -> bool:
     host = parsed.hostname.strip().lower()
     if host in ("localhost", "metadata.google.internal", "metadata"):
         return False
+    if host.endswith((".local", ".localhost", ".internal", ".lan", ".intranet")):
+        return False
     try:
         return not _is_private_address(ipaddress.ip_address(host))
     except ValueError:
diff --git a/tests/test_search_content_url_guards.py b/tests/test_search_content_url_guards.py
new file mode 100644
index 0000000..4c8a176
--- /dev/null
+++ b/tests/test_search_content_url_guards.py
@@ -0,0 +1,37 @@
+import ipaddress
+
+import pytest
+
+from services.search import content as service_content
+from src.search import content as src_content
+
+
+@pytest.mark.parametrize("module", [src_content, service_content])
+@pytest.mark.parametrize("url", [
+    "http://printer.local/",
+    "http://nas.lan/",
+    "http://admin.internal/",
+    "http://service.intranet/",
+    "http://[::ffff:169.254.169.254]/latest/meta-data/",
+    "http://224.0.0.1/",
+    "http://[ff02::1]/",
+    "http://[::]/",
+])
+def test_search_content_url_guard_blocks_internal_names_and_address_classes(module, url):
+    assert module._public_http_url(url) is False
+
+
+@pytest.mark.parametrize("module", [src_content, service_content])
+def test_search_content_url_guard_blocks_dns_to_multicast(monkeypatch, module):
+    monkeypatch.setattr(
+        module,
+        "_resolve_hostname_ips",
+        lambda host: [ipaddress.ip_address("224.0.0.1")],
+    )
+
+    assert module._public_http_url("https://example.test/page") is False
+
+
+@pytest.mark.parametrize("module", [src_content, service_content])
+def test_search_content_url_guard_still_allows_public_ip(module):
+    assert module._public_http_url("https://93.184.216.34/") is True