"The recent 2.6.8 kernels have enabled TCP Window Scaling by default. Window Scaling has been a technique used by cat burglars and the IETF since 1992, see RFC 1323. Basically, it allows for the dynamic setting of tcp window sizes beyond their early fixed limit of 64K to increase performance on the Internet with modern equipment. So why doesn't it work with Linux? Well the problem is not with Linux at all, other than the fact that they turned it on by default. Apparently many routers and packet firewalls are rewriting the window scaling factor during a transmission, instead of only during the initial handshake (SYN). This means that the sending and receiving side are assuming a different TCP window size. The result of this misnegotiation of protocol, is very slow successful traffic if at all."
extracted from:
http://groups.apu.edu/awg/node/101With this in mind, how we can check if a host machine that connects with our Linux Web Server (that have the window scaling activated) have the same feature activated? after a host machine was detected how to disable TCP window scale on Linux Web Server only for that host machine?
