Ensure that no users are connected to SGD through the Gateway.
Change the symbolic link for the gateway.xml file, so that it links to the gateway-plaintext.xml file, instead of the default setting of gateway-ssl.xml.
Run the following command:
# ln -fs /opt/SUNWsgdg/etc/gateway-plaintext.xml /opt/SUNWsgdg/etc/gateway.xml
Depending on your network configuration, you might also need to change the binding port for the SGD Gateway.
# /opt/SUNWsgdg/bin/gateway restart