Why is browsing internet so bloody slow?

Tisch · 10-30-2006, 12:05 PM

Hi,

Since i installed slackware 11 on my computer, surfing the internet is pain in the ass! Its slow, very slow. I dont mean downloading, thats fast as usual, but when it comes to surfing the web, its stupid. The whole time, "Connecting to www.linuxquestions.org" or "www.something.com" for 5 damn minutes everytime i click on a link in the forums or whatever.. it keeps connecting for 5 min and then loads the page.. its just very very frustrating. As far as i know i have no firewal enabled on the system, and yes i have a 10/10mbit line. so slow it should not be!

Tested all webbrowsers.
Any ideas?
thanx
//Tisch

Slack 11, 2.6.18 kernel.

uselpa · 10-30-2006, 12:35 PM

That sounds like a DNS issue.
Try `dig www.linuxquestions.org` and report us the query time (at the bottom of the output).

hrp2171 · 11-09-2006, 03:43 PM

I've noticed the slow down you talk about but when logged on with my user account. When I'm on as root, the Internet connection is superfast.

masonm · 11-09-2006, 07:13 PM

I was also seeing some slow net performance. I installed Guarddog and configured my firewall and it's nice and fast now. I can't really say what changed but it definitely made a huge difference.

granth · 11-13-2006, 07:13 PM

What nic drivers do you have loaded?

Basel · 11-22-2006, 10:01 AM

I having the same issue with slow Internet surfing yet normal download speed. Here is the output of dig for some websites:

Code:

basel@slack-amd64:~$ dig www.linuxquestions.org
;; Query time: 578 msec

basel@slack-amd64:~$ dig www.kooora.com
;; Query time: 3659 msec

basel@slack-amd64:~$ dig www.psu.com
;; Query time: 1078 msec

basel@slack-amd64:~$ dig www.theserverside.com
;; Query time: 2478 msec

How can I know what nic drivers are loaded on my machine?

hrp2171 · 11-22-2006, 10:52 AM

Basil,

If you know the NIC's manufacturer or model name, as root type:

lsmod

or

lspci

and look for your NIC information.
-------------------------------------------------------------------------------------------------------
Masonm,

I have installed guarddog on my home pc. Thanks for the tip. What kind of changes did you make for the browsing to go faster? Thanks.

Before installing guarddog, I ran iptables -L and iptables -t nat -L but it's all a foreign language to me. The iptables man page didn't make it any better.

Basel · 11-22-2006, 11:04 AM

hrp2171, Did your Internet browsing go faster after installing guarddog?

Code:

root@slack-amd64:/home/basel# lspci | grep Ethernet
00:05.0 Bridge: nVidia Corporation CK8S Ethernet Controller (rev a2)
02:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet (rev 10)

masonm · 11-22-2006, 11:14 AM

Quote:

Originally Posted by hrp2171

Basil,

If you know the NIC's manufacturer or model name, as root type:

lsmod

or

lspci

and look for your NIC information.
-------------------------------------------------------------------------------------------------------
Masonm,

I have installed guarddog on my home pc. Thanks for the tip. What kind of changes did you make for the browsing to go faster? Thanks.

Before installing guarddog, I ran iptables -L and iptables -t nat -L but it's all a foreign language to me. The iptables man page didn't make it any better.

I have no idea which changes affected it. I simply set up permissions for the services I use and blocked everything else to create a strong firewall.

hrp2171 · 11-22-2006, 12:43 PM

Those iptables commands are just for listing what's already in place. I'm going to post the output and see if someone can decipher it for me.

I going to RTFM on guarddog and I'll try to find a good iptables tutorial.

Basel · 11-23-2006, 03:27 AM

I've noticed an improvement after disabling ipv6. I added the following two lines to /etc/modprobe.conf

Code:

alias net-pf-10 off
alias ipv6 off

I tried adding "blacklist ipv6" to /etc/modprobe.d/blacklist but it did not do anything.

uselpa · 11-23-2006, 05:07 AM

One tip I could give is using dnsmasq. Some of the DNS response times shown in these threads are quite high, and internet browsing does a lot of redundant DNS lookups. Using dnsmasq, these lookups are slow only the first time. It brought a huge improvement for me.