diff --git a/loolwsd/loolwsd.xml.in b/loolwsd/loolwsd.xml.in
index 0916f01f6..d462fb7db 100644
--- a/loolwsd/loolwsd.xml.in
+++ b/loolwsd/loolwsd.xml.in
@@ -26,6 +26,10 @@
         <filesystem allow="false" />
         <wopi desc="Allow/deny wopi storage. Mutually exclusive with webdav." allow="true">
             <host desc="Regex pattern of hostname to allow or deny." allow="true">localhost</host>
+            <host desc="Regex pattern of hostname to allow or deny." allow="true">10\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}</host>
+            <host desc="Regex pattern of hostname to allow or deny." allow="true">172\.1[6789]\.[0-9]{1,3}\.[0-9]{1,3}</host>
+            <host desc="Regex pattern of hostname to allow or deny." allow="true">172\.2[0-9]\.[0-9]{1,3}\.[0-9]{1,3}</host>
+            <host desc="Regex pattern of hostname to allow or deny." allow="true">172\.3[01]\.[0-9]{1,3}\.[0-9]{1,3}</host>
             <host desc="Regex pattern of hostname to allow or deny." allow="true">192\.168\.[0-9]{1,3}\.[0-9]{1,3}</host>
             <host desc="Regex pattern of hostname to allow or deny." allow="false">192\.168\.1\.1</host>
             <max_file_size desc="Maximum document size in bytes to load. 0 for unlimited." type="uint">0</max_file_size>