Blog Posts Tagged with "Cisco IOS"

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Prevent VoIP Toll Fraud with Proper Configurations

February 22, 2012 Added by:Enno Rey

Unfortunately the attacker was able to circumvent our first workaround. We discovered that it was possible to “dial-in” to the router directly by calling the head number. As a long-term solution the configured dial patterns have to be modified to prevent such things in the future...

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