here is the translation of Fabiola's message:
Good afternoon,
The 5403 signature "OpenSSL SSL / TLS Handshake DoS Malformed" generates alerts me average, many times a day. The strange thing is that anyone who generates more number of events is the proxy server (ISA Server), the truth I have not clear why this event is generated or it is causing. Sometimes I have also found that the lan machines also produce this behavior and alert.
I hope you can help me please.
Thank you very much.