Re: TCP windows gets smaller.

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Are you passing through the internet, or is this internal?

Its likely that there is a bandwidth management device in between if you 
dont have control of the entire path. Our ET/BWMGR (which runs on LINUX 
btw) for example, uses TCP window manipulation to shape traffic.

FYI, both windows are likely reduced..you just cant see it on your end 
because it doesnt happen until it reaches the shaping device. The idea is 
the "trick" the receiver into thinking that the window is smaller than it is.

One way around it is to encrypt your data in a vpn. Of course if they are 
limiting your IP address (or globally) it wont help, but your window wont 
be affected!

dennis baasch


Emerging Technologies, Inc.
-------------------------------------------------------------------------------------

http://www.etinc.com
ISA and PCI T1/T3/V35/HSSI Cards for FreeBSD and LINUX
Multiport T1 and HSSI/T3 UNIX-based Routers
Bandwidth Management Appliances
Bandwidth Management software for LINUX and FreeBSD

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