Radius server how does it work

In the former case, the connection takes place through port the latter takes place through IPSec. The server takes in the username and password from the user and creates an access-request message and sends it to the RADIUS server.

The password is encrypted in the access-request and there is also RADIUS access secret code so that it is not misplaced in the transfer process. If it is not, the request is rejected immediately and if it is found to be suspicious, the server can be blocked from further request. The server also looks at the authentication method request. The authentication method must be within the allowed method.

If the authentication method is within allowed, then the user name and the password are accessed. The decryption is done and the credentials are matched with that of the database. Once matched, various user information and data are fetched to match with the access policy set in the server. If the credentials or the policy do not match, the access is denied. This Access-Reject message can be accompanied by a text message indicating the reason for the refusal.

If the username is found and the password is correct, the RADIUS server returns an Access-Accept response, including a list of attribute-value pairs that describe the parameters to be used for this session. Typical parameters include service type shell or framed , protocol type, IP address to assign the user static or dynamic , access list to apply, or a static route to install in the NAS routing table.

The RADIUS accounting functions allow data to be sent at the start and end of sessions, indicating the amount of resources such as time, packets, bytes, and so on used during the session.

The Firebox puts those users into one logical group so you can easily administer user access. When you create a policy that allows only authenticated users to access a network resource, you use the RADIUS Group name instead of adding a list of many individual users.

You can create a policy that allows the group Sales to get access to a resource. You can then add a different policy to allow IT Support users to get access to resources. Then you can filter their web access with WebBlocker. This process is called failover.

This number of authentication attempts is not the same as the Retry number. You cannot change the number of authentication attempts before failover occurs. If there is no response, the device waits the number of seconds set in the Timeout text box, and then it sends another Access-Request.

This continues for the number of times indicated in the Retry text box or until there is a valid response. If the secondary server also fails to respond after three authentication attempts, Fireware OS waits for the Dead Time interval 10 minutes by default to elapse.