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Q141958 - ERRMSG: RemoteException: Because of Security Restriction

RemoteException: Because of Security Restriction

SYMPTOMS

Server Exception:

CAUSE

With the introduction of version 1.1 of the .NET Framework, a number of Remoting-related changes have been made. Most of them are focused at increasing security of .NET applications. If you use client activated objects, events or delegates you will quite likely encounter this exception when running on the .NET Framework 1.1.

Generally you see this error because you are trying to pass a type with the wrong typeFilterLevel. You need to have typeFilterLevel set both on the server and the client because communications are in both directions.

RESOLUTION

To change the security level to allow passing of delegates and object references over Remoting boundaries, you have to change the so called "typeFilterLevel".

Note: This problem is ONLY related to the .NET Framework 1.1. Do NOT set typeFilterLevel if you use .NET Framework 1.0.

You can do this either by using a configuration file like this (for server side):

In this case, a matching client-side configuration file which allows the reception of events and callbacks, would look like this:

<system.runtime.remoting> <application> <channels> <channel ref="tcp" port="0"> <clientProviders> <formatter ref="binary" /> </clientProviders> <serverProviders> <formatter ref="binary" typeFilterLevel="Full" /> </serverProviders> </channel> </channels> <client>  </client> </application> </system.runtime.remoting> </configuration>

If you prefer to setup your channels in source code, you have to use the extended constructor of the HttpChannel or TcpChannel to pass a custom IFormatterSinkProvider object:

BinaryServerFormatterSinkProvider serverProv = new BinaryServerFormatterSinkProvider(); provider.TypeFilterLevel = System.Runtime.Serialization.Formatters.TypeFilterLevel.Full; BinaryClientFormatterSinkProvider clientProv = new BinaryClientFormatterSinkProvider(); IDictionary props = new Hashtable();props["port"] = 1234; TcpChannel chan = new TcpChannel(props, clientProv, provider); ChannelServices.RegisterChannel( chan );