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2620XM Dialin security

We have a 2620XM router with 16modems.We have tel lines connected to these modems.The users are able to dialin these lines and get connected to our network.The flaw is that there is no authentication required to get connected. We are really concerned about this issue.Can someone please help us in sharing the information of setting up the modems to have them authenticated everytime, when someone wants to connect to our network.

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Re: 2620XM Dialin security

You can configure PPP authentication. Refer the following documents how to configure it for async lines.

http://www.cisco.com/en/US/tech/tk801/tk703/technologies_design_guide_chapter09186a00800de9d8.html

http://www.cisco.com/warp/public/793/access_dial/5300.html

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