openvpn/dns issues on ubuntu 14.04

[Paolo De Michele]

thanks for your reply
I do not think it is a server problem because a client is working properly
if you see the previous email dig works fine but when I request that web
page from a browser can not display the page

I have this problem only with two clients that use ubuntu.
the client with lubuntu works properly.

can I verify anything else?
thanks in advance

regards

On Tue, 07 Apr 2015, Henk te Sligte wrote:

> Just yesterday I configured a debian openvpn server and ubuntu clients. On
> the server, you need to have IP forwarding enabled, and iptables should
> forward all traffic.
> 
> First, enable IP forwarding:
> sudo sysctl -w net.ipv4.ip_forward=1
> sudo /etc/init.d/procps restart
> 
> Then, let iptables forward all traffic:
> iptables -t nat -I POSTROUTING -o eth0 -j MASQUERADE
> iptables -A FORWARD -i tun0 -o tun0 -j ACCEPT # vpn to vpn
> iptables -A FORWARD -i tun0 -o eth0 -j ACCEPT # vpn to ethernet
> iptables -A FORWARD -i eth0 -o tun0 -j ACCEPT # ethernet to vpn
> 
> Note that this doesn't filter any traffic, it just makes sure that you can
> communicate with the ethernet. If you want to block certain traffic and
> allow other traffic, I suggest to read some more about iptables.
> 
> 
> 
> On Tue, Apr 7, 2015 at 11:14 AM, Paolo De Michele <paolo at paolodemichele.it>
> wrote:
> 
> > anyone can help me?
> > thanks in advance
> >
> > regards
> >
> > On 3 April 2015 at 12:25, Paolo De Michele <paolo at paolodemichele.it>
> > wrote:
> >
> >> hi there,
> >>
> >> this is my scenario:
> >>
> >> - 1 server (I installed openvpn and bind via docker in 2 different
> >> instances)
> >> - 3 clients (first one with lubuntu 14.04 x64 and the last two clients
> >> with ubuntu 14.04 x64)
> >>
> >> the vpn server works correctly
> >> if I connect to the server with vpn client installed lubuntu I have no
> >> problem.
> >> if I try ubuntu by clients, same problems.
> >>
> >> let me explain:
> >>
> >> the connection to the vpn server works correctly
> >> I have an additional interface called tun0 with a regular ip address
> >> I have also the new dns servers: the first one private (my dns server)
> >> and the other two (publics)
> >>
> >> if I try to solve an hostname by dig command, works perfectly
> >> if I try to view the same hostname via browser I cannot be able to
> >> visualize the webpage
> >> If I try the ip address, works perfectly
> >>
> >> can I do other tests?
> >> anyone can help me please?
> >>
> >> thanks in advance
> >> regards
> >>
> >
> >
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