Alice is responsible for the file server where all of the company payroll and accounting data is stored, and as a result, security is one of her primary concerns. To prevent potential intruders from intercepting sensitive data in transit over the network, Alice wants to ensure that all of the company bookkeepers and accountants use IPsec to encrypt their traffic as they access the financial spreadsheets stored on the server. 

Alice has located the inbound firewall rules on the server that enable users to access files using their spreadsheet application. How can she modify those rules to permit access only under the following conditions:

• The user must be a member of the Accounting group.
• The user must be using a computer on the company subnet.
• The user must connect using IPsec encryption.