Define Strict Routing Rules

When defining IP-to-Tel (IP-to-Trunk Group Routing table) and Tel-to-IP (Tel-to-IP Routing table) routing rules, it's crucial that you adhere to the following security guidelines:

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Make sure that your routing rules are accurate and correctly defined for the desired routing outcome. Inaccurate or “loose” routing rules can easily result in service theft.

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Avoid, if possible, using the asterisk "*" symbol and Any option to indicate any for a specific parameter in your routing rules. This constitutes weak routing rules that can be vulnerable to attackers. For strong routing rules, enter specific alphanumerical values instead of the asterisk.