Hello, Tom!

What version of SSL/TLS does that cisco router use? And what version did you
specify in your code?
--
With best regards, Vadym Stetsiak.
Blog: http://vadmyst.blogspot.com

You wrote  on Tue, 25 Sep 2007 19:10:03 -0700:

T> Greeting all,

T> I have a question of secure communication between a vb.net 2005 app
T> and  cisco routers. I appoligize if I don't provide enough info but
T> here goes.

T> I have written an application that successfully communicates with
T> routers  using unsecure sockets (system.net.sockets).  I need to
T> change that to use  secure communication.

T> I have been trying to get SslStream (system.net.security) to work.  I
T> have  read all the documentation but nothing is working.  I am
T> creating a TCPClient  then using that client in the SslStream
T> creation.  I'm not getting an error  on the SslStream creation but
T> I'm not convinced that it's working.  I do get  the error when I try
T> to AuthenticateAsClient.  The error I get is "Handshake  failed due
T> to unexpected packet format."

T> here is the code

T> public function ValidateServerCertificate(object
T> sender,X509Certificate  certificate, X509Chain chain,SslPolicyErrors
T> sslPolicyErrors) as boolean

T>            if (sslPolicyErrors = SslPolicyErrors.None)
T>                 return true            end if

T>             Console.WriteLine("Certificate error: {0}",
T> sslPolicyErrors);

T>             'Do not allow this client to communicate with
T> unauthenticated  servers.
T>             return false end function

T> sub...
T> ...
T> client TcpClient = new TcpClient(IPAddressofRouter,443)

T> sslStream SslStream  = new SslStream(client.GetStream(), false,
T> new RemoteCertificateValidationCallback (AddressOf
T> ValidateServerCertificate), null)

T> sslStream.AuthenticateAsClient(serverName)

T> ...
T> I noticed when I step through my code, ValidateServerCertificate
T> never gets  called. I'm not exactly sure how that part works.

T> Any ideas what may be wrong?
T> Is this actually the best approach?
T> Any help is GREATLY appreciated.

T> Thanks
T> Tom