debian sid connects to network but i have no internet!

[jackgu1988]

hi! i am running debian sid on an hp hdx 16 (64 bit) with kde 4.3. i always install new updates and my last update was 2 days ago! now when i booted i could connect to the internet but when i try to visit a web address or even run apt-get update, i get nothing! i tried both wicd and kdenetworkmanager but they don't work! i also tried wifi and ethernet and still nothing! also it can not be the network because i can connect using an acer aspire one with debian sid and gnome. i can also ssh to the hp through my acer but still apt-get update does not load! before the shuting down my hp the last time i had internet working i modified /etc/hosts. could this be the problem?

thank you,
jack

[mojoman]

could you try to ping a website? Try:

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ping -c 3 74.125.77.104

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ping -c 3 www.google.com

Both lead to google. If the first works but the second do not then you have a problem with your dns settings.

Also, post your /etc/hosts.

[jackgu1988]

i can't ping! says unknown host www.google.com!

my /etc/hosts:

jack@debian:~$ cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 debian.local debian

# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

[jackgu1988]

well my /etc/hosts is the same on both pcs. i use the same localdomain on both and the acer works fine!

[jackgu1988]

any odeas? still no luck! thank you!

[mojoman]

i can't ping! says unknown host http://www.google.com!

But you could ping 74.125.77.104?

If so, this strongly suggests that you have a problem with resolving ip addresses. You might want to compare /etc/network/interfaces and /etc/resolv.conf on your pcs and see if they differ in regard to settings on name server.

[jackgu1988]

ok i ll do it tomorrow though first thing in the morning because i have to go now! thanks for your answers!

[jackgu1988]

ok i can ping 74.125.77.104! the acer's /etc/resolv.conf looks like:

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nameserver 217.72.162.2
nameserver 217.72.163.3

while on the hp looks like:

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# Generated by NetworkManager
nameserver 192.168.1.1

the /etc/network/interfaces looks on both computers like:

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# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp

[mojoman]

Well, have you tried to use the values for the Acer's /etc/resolv.conf on your HP? That might very well do the trick.

EDIT:
Just to clarify. Obviously, the Internet connection on your HP works just fine. It is resolving addresses that is the problem (e.g. translating 74.125.77.104 into www.google.com). This is what your domain name server (dns) does and the configuration file used is normally /etc/resolv.conf.

The dns (as stated in resolv.conf) for your HP points to what I would assume is your router (most routers use 192.168.0.1 or 192.168.1.1 as IP for the router, which will give the computers connected to the routers IP addresses of 192.168.0.x or 192.168.1.x). This may well work, assuming your router in turn points to another dns. If you don't have a router, well, then that is obviously your problem but you might very well use external dns even if you have a router. This is what your Acer is doing and since it seems to work you might want to try it in your HP too.

[AquaL1te]

Try:

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# arp -av

An ARP request will be send, if you'll get a proper reply then you can rule out a router network connection problem, but do check if the IP is from your router (or an other connection source for that mater). And of course check your /etc/resolv.conf, but that suggestion is already given.

I had a similar problem a very long time ago, when I was still a Windblows user. The solution was that my default browser was using a proxy. It wouldn't hurt to check that out

[jackgu1988]

+1 to mojoman! that did the trick! i really can not understand why while installing debian on both pc's in the same network they had different settings. Keesdejong thanks for your reply but i also had the same problem with proxy when i was using windows so it was the first thing to check! but thank you anyway! problem solved!