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I am using debian sarge. I want to block all incoming requests except DNS (port 53) and allow all outgoing traffic. I did a apt-get shorewall. When I start shorewall, I cannot even ping to any external site. I am a newbie and difficult to follow the online guide. Can anyone please help me. Thanks !

Does anyone know how to maximize music on hold quality on calls inbound from PSTN? I know that it is common to have choppy and static sounding music on hold when connecting via PSTN but how can that be minimized? I assume that the bitrates, type of music, etc can minimize the effects. Does anyone have any experience in this area? Do you know where I should look for more information?

The PDF file on the web, which is an appendix on nonlinear regression associated with the CAR book, is very nice. When I ran through the code presented there, I found something odd. The code does a certain model in 3 ways: Vanilla NLS (using numerical differentation), Analytical derivatives (where the user supplies the derivatives) and analytical derivatives (using automatic differentiation). The

I''ve spent the last several months learning RoR and building my first app. I''ve not used migrations yet and honestly don''t understand them much, and have not had my app under version control. I''ve decided it''s time (I know, some will say way past time ;-) ) to put the app under version control. I''ll be using Subversion and have begun working

I''m having a hard time figuring out how to build my application using Rails. As i go along, simple questions occur to me like: are you supposed to have a separate model class (each in its own file, in the app/models directory) for each table in your database? You''d think that something as basic as this would be laid out in the introductory documentation but, alas, the