On Mon, 5 Nov 2007, Ioannis Vranos wrote: > OS: CentOS 5.0 x86. > > Hi, I am using CentOS 5.0 at home, ADSL ~16 Mbps/~1 Mbps Internet connection > and my ping time to my ISP is 160-170 msec. > > When downloading something with Firefox, I am getting download speeds of > about 100-180 KB/sec (for example when downloading SP2 of XP from MS server). > > Are the CentOS networking settings OK for this kind of latency, or do I have > to change some settings? I am using this on my CentOS 4 machine. I would expect it to work on a CentOS 5 machine as well. Add the following to /etc/sysctl.conf net.core.rmem_default = 67108864 net.core.wmem_default = 67108864 net.core.rmem_max = 67108864 net.core.wmem_max = 67108864 net.ipv4.tcp_mem = 4096 67108864 67108864 net.ipv4.tcp_rmem = 4096 67108864 67108864 net.ipv4.tcp_wmem = 4096 67108864 67108864 Run sysctl -p Barry