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REMOTE ACCESS SERVERS (RAS) AND MODEM POOL

Remote access refers to the use of network resources from a remote location, which is not directly attached to the network. There are different ways of remote access, such as using a pair of modems and a communication link to connect the remote user's PC with the network. Hence, there are three areas need to be protected: the remote user, the network resources and the communication link.
SSL-VPN is one of the latest technologie for remote access. It should be also used secured.
• Clearly identify users who would be granted with remote access privileges and what types of services could be provided to them.
• Only authorised users should be allowed to gain remote access to the network with proper authentication and logging.
• Properly configure firewall system to restrict remote access.
• RAS and modem pool should be physically secured.
• Connection to RAS should be logged to record the login session initiation and termination, the connection starting and ending time, the addition, updates or deletion of user accounts on the RAS and etc.
• Encryption should be used to protect user credentials or data during transmission over these links.
• Dial-in services can also be flooded by repeatedly dialling. The setting of time-outs counters or dial-in time limitations can be used to reduce the chance of being flooded.