The ProxySG has RFC-1323 enabled, but it's only requesting a scaling-factor of 1 when connecting to webservers, resulting in slow download speeds for large files on the network.
Window-Scaling behaviour in SGOS with RFC-1323 enabled is currently as follows:
Inbound Connections The ProxySG will accept whichever scaling-factor is requested by the client.
With ADN enabled - the ProxySG will request a window scale of 6 by default.
With ADN disabled - the ProxySG will request a scaling-factor of 1 by default. To allow for the use of larger scaling-factors, the TCP window-size should be increased. For example: #(config)tcp-ip window-size 4194240
(TCP window-size is 65535 by default)
Imported Document ID: 000016667
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