Does the Spark HG659b have the ability within its firewall to restrict inbound connections to certain IP addresses or ranges? So, for example, if I open an external port, to restrict inbound connections to that port to certain IP ranges?This appears possible with other routers (eg http://www.draytekusa.com/restricting-open-ports-access-specific-source-ip-addresses), and I assume it's not possible with the HG659b, but I don't know my way around it's firewall, so thought I'd ask.
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