kubuntu lost internet connection every 30 sec.

[ice9]

Hello experts,

I have installed kubuntu today. Everything is ok and works fine except my internet connection. I'm using aDSL and the problem is when I connect my aDSL on the internet it's work fine for 30 sec. After 30 sec. the connection is down, and I have to manualy reconet it again, and again...Every 30 sec.
How can i fix this?

Thanks in advance.

[Kojak]

Is it a direct DSL-modem connection or do you use LAN/ethernet connection through a router?

[ice9]

It is a LAN/Ethernet trouhgt a router.

Thanks.

Is it a direct DSL-modem connection or do you use LAN/ethernet connection through a router?

[Kojak]

Check your resolv.conf file

sudo cat /etc/resolv.conf

If there is some IP like 192.168.0.1 or 10.0.0.1, then you need to replace the IP's in there (which is your routers address) with valid DNS server entries from your ISP.

[ice9]

Cool man. This fix the problem.

Thanks.

Check your resolv.conf file

sudo cat /etc/resolv.conf

If there is some IP like 192.168.0.1 or 10.0.0.1, then you need to replace the IP's in there (which is your routers address) with valid DNS server entries from your ISP.

[ice9]

Ok, another problem is in the /etc/resolv.conf file. I put in this file one of our authoritative DNS servers and everything was ok for about 1 minute. After that when i check my /etc/resolv.conf file i have seen that it was reseted to the old values. For example:

cat /etc/resolv.conf
nameserver 62.162.32.5
nameserver 4.2.2.3

with this combination work for a couple of minutes and after that for some reason it come back to the previous state

cat /etc/resolv.conf

nameserver 192.168.1.1

Thanks.

Check your resolv.conf file

sudo cat /etc/resolv.conf

If there is some IP like 192.168.0.1 or 10.0.0.1, then you need to replace the IP's in there (which is your routers address) with valid DNS server entries from your ISP.