How to limit inbound/download traffic on internet edge. One of my customer is having single 150Mbps internet leased line for proxy and reverse-proxy traffic. Service provider won't do any QOS on internet link. We want to limit download traffic of open Guest/wireless users. All guest private IPs are NAT/PAT to one dedicated public IP address. As I know shaping is not possible in inbound direction. Policing is the only solution. I drop Guest internet traffic (inbound) after crossing 150Mbps link at internet edge router facing ISP. This method is depending on TCP flow control and there is huge number of TCP sessions. What other technology solutions are available to achieve this? My goal is to limit Guest internet download traffic to give space for other traffic in inbound direction.
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Other solutions include shaping outbound ACKs or using a special traffic appliance (e.g.Packeteer) that can also manipulate advertised receive buffer space.
BTW, inbound policing or outbound shaping of ACKs will impact TCP inbound traffic bandwidth usage, but it's not very precise and sender's modification of transmission rate can be slow.
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