weird internet problem in Kubuntu 6.06

[O. Sinclair]

Hi,
I was definitely a bit short on info so here comes some more;
the pc in question is part of a LAN of mixed Windows XP and Kubuntu 
computers. I run Kubuntu myself and have no problems and that also goes 
for one other PC in the system. The XP computers have no problems.

SMB "browsing" in the LAN works for her as does email via Kontact. 
Nslookup is not working "unknown host" and nor does ping. On the LAN I 
can reach our linux-based gateway wia webmin browser interface.

There is a firewall in the gateway but not very strong (iptables in 
other words), otherwise no router, proxy etc. is used.

Sinclair

Joseph wrote:
> Hello Sinclair,
> 
>   We can help but need more information to do so.  How
> are you connected to the Internet?  Are you behind a
> router/firewall/proxy?  Did you check if name
> resolution is work i.e. DNS with nslookup or dig?  Can
> you get to your default gateway via ping or its
> management interface?  Is your ISP experiencing
> downtime?  I will stop now as I could go on for
> days....
> 
>   Please note that ping is not the be and end all test
> of connectivity and many devices filter ICMP packets
> so they will infact be "up" but a ping will show them
> as "down."
> 
>   Any other details will help us help you.. =)
> Thanks,
> Joe
> 
> 
> Message: 8
> Date: Mon, 25 Jun 2007 16:21:50 +0200
> From: "O. Sinclair" <o.sinclair at gmail.com>
> Subject: weird internet problem in Kubuntu 6.06
> To: Kubuntu Help and User Discussions
> <kubuntu-users at lists.ubuntu.com>
> Message-ID: <467FCF7E.5050509 at gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1;
> format=flowed
> 
> I have a user that has a desktop PC running Kubuntu
> LTS. All of a
>  sudden 
> internet browsing and thinks like ping are not working
> - but email
>  does!!
> 
> I dont have a clue as to what might be suddenly wrong.
> There is no 
> firewall interface installed ala Guarddog installed on
> this one. LAN 
> browsing works.
> 
> HELP! any ideas appreciated,
> 
> Sinclair
>