Although I can't post detailed info and code (the customer considers it proprietary), I can describe a 30,000 ft level view of what happens.

As Sebastian mentioned we copied the DNN Authentication Provider code that hashes/unhashes the values stored in the appropriate DNN tables and copied those tables down to the client.

The result is that the client's logon to the local database authenticates the same credentials as the DNN website. By periodically replicating those tables to the client, the client is kept up to date whenever a change on the DNN site occurs.

Hello Sebastian, I am trying to generate password like DNN, But I dont have success, Can you help me about that??

this is my code to generate password:
txtprueba.Text = AspNetSecurity.Membership.GeneratePassword(MinPasswordLength() + 4, MinNonAlphanumericCharacters)

But the password generated is not valid when the user try to login in the portal, maybe I am using the incorrect functions.

I'll really appreciate if you give me any guide.

Thanks

Thank you for your answer Sebastian, But I am reading about the membership and I know I must use the machine key but I dont get success :(

this is my code for encrypting password:
lblPrueba.Text = negocio.Encrypt(Machinekey, 'qwer1234')

My question is What is the mean of password Salt and How can i generate or use?

Thanks