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-   -   Slow internet connection iptraf shows a lot of UDP port 53 (Domain) traffic (https://www.linuxquestions.org/questions/linux-networking-3/slow-internet-connection-iptraf-shows-a-lot-of-udp-port-53-domain-traffic-777487/)

bucovaina78 12-22-2009 12:03 PM

Slow internet connection iptraf shows a lot of UDP port 53 (Domain) traffic
 
Well,

My internet connection is very slow. Surfing takes a lot of time before sites show up. In w3m I see "opening socket" for a long time but when it finds the site it's there immediately. I also have a Windows PC here and it works just fine.

My setup is as follows.

192.168.2.x connects to my router. and I have another network behind 192.16.2.x which is 192.168.1.x that is connected to all my Linux machines. If I try to connect my linux machines to the network that connects immediately to my Router (internet) it makes totally no difference.

iptraf shows a lot of UDP-traffic again and again port 53, once it stops showing those 53-lines it starts to transfer at higher rates and the site is loaded at normal speeds. My max download/upload is something about 500KB/s Down and 60KB/s up, this should be more than fast enough for w3m internet surfing isn't it?

Someone familiar with this problem?

Thanks

Wannes

nimnull22 12-22-2009 12:16 PM

You may need to disable IPv6. Try to search in google how to do this for your linux.

bucovaina78 12-22-2009 12:25 PM

Hi

Thanks for your swift respones. But the problem stays the same.

I added a file

/etc/modprobe.d/00local

and added following lines:

Code:

alias net-pf-10 off
alias ipv6 off

I can still see a lot of DNS-requests. they come from all kinds of ports on my box and all direct to port 53 on my router.

Small edit:

How can I check if ipv6 is really disabled this time?

edit again:

with

Code:

lsmod | grep ip
and it should NOT be listed?

nimnull22 12-22-2009 01:53 PM

Do please, and post output for: ifconfig -a


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