* Modify the filter chain to add a filter which blocks
* new SIP requests.
*/
DefaultProtocolChain protocolChain = new DefaultProtocolChain();
if (serverHandler.protocol() == Controller.Protocol.TLS) {
SSLReadFilter sslfilter = getSSLReadFilter(sipBindingCtx);
protocolChain.addFilter(sslfilter);
protocolChain.addFilter(new MessageProcessorFilter(this,