the network has downlink with a penta@net DVB card for down-link ; then it's connected to the ISA server which distributes the connections to 3 other networks. the UP-Link is routed thru a cisco router which is connected with an ISP selling the network owners the bandwith of 512Kbit/sec DownLink and 128kbps UPLink. this is a sketch which might can help:
downlink LAN1 -----> /\ Internet >>> PENTA@NET on Windows server ] >>> [ISA proxy server on Windows] ======>>LAN2
|| \/ || LAN3 Internet <<<<ISP<<<UPlink <<<<Cisco router||
what i have done on linux is just a simple NAT and a redirect to Squid to force transparent cache so the user does not have to configure his browser.
The Problem: ==========
I did not do any shaping, even on squid no shaping, and all i get using the NETSPEED GNOME plugin on the Internet side is 16 Kbytes per sec up and 32Kbytes/sec on the Local side as total speed of the whole 3 networks. and as you should have noticed, my Linux box should work as a water hause or pipe and has no real effect on the bandwidth.
if i returned back the windows ISA box the speed goes normally at its 52kbyte/sec.
so what is happening FOR GOD'S SAKE!!???
in addition , after all that, i thought it was slow because of the RCV and SEND buffers settings in the kernel an the TTL=64. so set RCV and SEND as twice the kernel's default on /etc/sysctl.conf as:
net.core.rmem_default = 262140 net.core.wmem_default = 262140 net.core.rmem_max = 262140 net.core.wmem_max = 262140
the RESULT IS THE SAME!!!
so what is happening FOR GOD'S SAKE!!???
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