add documents to the slave

[Miguel Valencia]

Hi

    I've read that it's possible add documents to slave machine:
http://wiki.apache.org/solr/SolrReplication#What_if_I_add_documents_to_the_slave_or_if_slave_index_gets_corrupted.3F

¿Is there anyway to not allow add to documents to slave machine? for 
example, touch on configurations files to only allow handler "/select".

Thanks.