i am assigned a network to replace its "Windows server with ISA caching
proxy" with another "debian linux with squid proxy" with both
"linux"
and "ISA" are completely differnet boxes. i am using linux 2.6 kernel
since the linux server has SATA hard disks .
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!!???
