My company's web site load very slow in some countries and always end with timeout. I RDP to a friends PC and found a lot of http 407 error when accessing my company's web site. Access to other web site in my region is normal and fewer http 407 error.
Wireshark show the TCP window size is 64K when access my web site. Comparing other success web sites, their window size is 490 with calculated window size 15680 and scaling factor 32.
Is window size can affect web performance and what should I tune - Cisco router or the NIC of the web server?
Can anyone guide me how to change the window size?