slow internet in lubuntu / ubuntu 12.04

this problem I got cause compalaining from my mom as internet cafe keeper :D

so the problem is "why connection so slow right now" but check on internet provider and some client that use old version that running well. only some client which use lubuntu 12.04 having slow connection.

as usual check on google that problem is because activated ip version 6 and may that machine look at the address and host to applied v.6 version.

resolve problem is only disable  ipv.6 in sysctl /etc/sysctl.conf  . with option add it on.

 

# disable IPv6
net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.default.disable_ipv6=1
net.ipv6.conf.lo.disable_ipv6=1

or easily execute this command on terminal :

echo -e "\n# disable IPv6\nnet.ipv6.conf.all.disable_ipv6=1\nnet.ipv6.conf.default.disable_ipv6=1\nnet.ipv6.conf.lo.disable_ipv6=1" | sudo tee -a /etc/sysctl.conf

then do :

sudo sysctl -p
sudo ifconfig eth0 down
sudo ifconfig eth0 up

reference :

http://www.noobslab.com/2012/05/disable-ipv6-if-your-internet-is.html

http://ubuntuforums.org/showthread.php?t=2083341