Piju's Personal Blog

This article will help you how to improve your internet connection speed by tweaking your /etc/sysctl.conf

1. open your /etc/sysctl.conf using your favourite text editor ( gedit, vim, nano, kate, kedit, etc )
2. at the end line of the file, paste this value

# increase TCP max buffer size setable using setsockopt()
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
# increase Linux autotuning TCP buffer limits
# min, default, and max number of bytes to use
# set max to at least 4MB, or higher if you use very high BDP paths
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
# don't cache ssthresh from previous connection
net.ipv4.tcp_no_metrics_save = 1
net.ipv4.tcp_moderate_rcvbuf = 1
# recommended to increase this for 1000 BT or higher
net.core.netdev_max_backlog = 2500
# for 10 GigE, use this, uncomment below
# net.core.netdev_max_backlog = 30000
# Turn off timestamps if you're on a gigabit or very busy network
# Having it off is one less thing the IP stack needs to work on
#net.ipv4.tcp_timestamps = 0
# disable tcp selective acknowledgements.
net.ipv4.tcp_sack = 0
#enable window scaling
net.ipv4.tcp_window_scaling = 1

3. then save

4. after that reload your sysctl using this command “sysctl -p” ( without quotes ) and change your MTU of your eth ( either eth0 or eth1 or wlan0 or something ) using “ifconfig eth0 mtu 1500″.

5. Another thing you can try that may help increase TCP throughput is to increase the size of the interface queue. To do this, do the following “ifconfig eth0 txqueuelen 1000″

6. The other way to tweak your internet connection is using Powertweak. Can be found on debian’s repo or ubuntu’s repo or u can download it at sourceforge

6. test your internet connection, more info you can find at this website and this