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Beginner

ASA scopy (SCP) Slow over high latency links

SCP to my firewalls in Japan and USA from the UK is painfully slow.  I suspect this is because the firewall does not do any window scaling. If I copy from a local machine, I get a transfer time of about 1m30s for a firmware image.  Transcontinental it is about 6h.  If I copy it to a linux box transcontinental it is only a couple of minutes. So obviously something the firewall is doing badly with the High latency link.

 

Is there any way I can improve this, other than by using a local jump host?

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