Security in .NET

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Security
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weblogic system, listenport: This property describes on which port the WebLogic server will listen for connections You should coordinate the use of a firewall with this port and explicitly open ports that you want to allow through while disallowing all other ports weblogic system SSLListenPort: This property defines the port that will be used to secure communications Again, you should coordinate this value with your firewall weblogic security, ssl enable: Setting this value to true enables the SSL port If you want WebLogic to do only SSL communications with external clients, allow only this port to pass through your firewall Digital Certificates for SSL: Do not use the demo certificates for production environments The digital certificates included in the WebLogic server are for demonstration and developmental purposes only You will need to get your own digital certificate specific to your deployment environment and domain name Administration Servlets : If you plan on using the administration servlets then make sure that the ACLs are restricted to be used only by authorized people Otherwise disable these servlets Servlets : Make absolutely sure that you set the permissions of the servlets to match your goals and expected audience Servlets that handle sensitive information should only be executed by people that are authorized to do so You must make sure that this is the case Review every ACL associated to a servlet weblogic system enableSetUlD: This property is only used on Unix systems It allows the WebLogic server to assume the identity of root for a short period of time in order to bind to port 80 during startup Once it has bound to this port, WebLogic reverts to normal user mode for the rest of the execution This is not a security threat, but you need to understand what happens when this property is set to true
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Other Security Items
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There are many other security items that can be handled with the WebLogic server These are all well covered in the documentation However, some of them are worth a special mention: Q Q Q Certificate-based user authentication The ability to perform audits Filtering network communications
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Certificate-Based User Authentication
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When having a two-way SSL communication, WebLogic has the possibility of using the information on the client's certificate to authenticate the remote user, thus removing the need for the client to explicitly provide a username and password Setting the following property enables this feature:
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weblogic security, realm certAuthenticator
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8
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The property must point to the name of a class implementing the weblogic security acl CertAuthenticator interface The authenticate () method in this interface receives the certificate chain, giving the implementing class the opportunity to search for information inside and search a LDAP directory or RDBMS table to match that information It returns an authenticated user or null if authentication failed
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Auditing
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In WebLogic you can create a pluggable auditing service for security-related events such as when a user attempts to authenticate, when a permission is tested, or when an invalid user certificate or root CA certificate is presented Using the weblogic security audit package you create a class that implements the AuditProvider interface, and install it in WebLogic by setting the weblogic security audit AuditProvider property to the name of your class Your AuditProvider class will receive all the events and then you can process them as you deem necessary
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Filtering Network Communications
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With the WebLogic server you have the ability to accept or reject connections based on criteria determined by your security policies You could, for example, deny any communication originating from outside your firewall, or accept it only if it is SSL-based To do this, set the weblogic securitynet ConnectionFilter property to the name of the class that implements the weblogic securitynet ConnectionFilter interface When a client connects, WebLogic constructs a ConnectionEvent and passes it to the accept () method of your ConnectionFilter class The event includes the remote IP address, as a j ava net InetAddress, the remote port number, the local WebLogic server port number, and a String containing the protocol (HTTP, HTTPS, T3, T3S, or HOP) Now, based on your criteria, you can accept the connection or throw a FilterException
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Summary
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In this chapter we have seen how authentication and authorization are handled in the WebLogic server We covered examples on how to code using cookies and SSL with examples of one and two way secure communications using a browser, as well as one way and two way secure communications using a Java client We reviewed ACLs and realms and closed by checking the weblogic properties file before deploying an application
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