If you want to change VOS3000 browser client port address edit the following file or find server.xml file under apache-tomcat installation conf folder change the Connector port 80 to whatever you want which is not used on system and reboot the system.
# nano /usr/apache-tomcat-5.5.15/conf/server.xml
<!– Define a non-SSL HTTP/1.1 Connector on port 8080 –>
<Connector port=“80″ maxHttpHeaderSize=”8192″
maxThreads=”150″ minSpareThreads=”25″ maxSpareThreads=”75″
enableLookups=”false” redirectPort=”8443″ acceptCount=”100″
connectionTimeout=”20000″ disableUploadTimeout=”true” />