Mailinglist Archive: opensuse (5100 mails)

[Ulrich Leopold <uleopold@xxxxxxxxxxxxxx>]

On Mon, 2004-06-07 at 09:59, Leendert Meyer wrote:
> On Monday 07 June 2004 08:29, Ulrich Leopold wrote:
> > On Mon, 2004-06-07 at 03:03, Leendert Meyer wrote:
> > > On Sunday 06 June 2004 15:37, Ulrich Leopold wrote:
> > > > I managed to get a connection between dhcp-server and dhcp-client. But
> > > > I do not manage to get an internet connection for the client. eth1 is
> > > > the dhcp-server where as eth0 gets the internet connection from the ISP
> > > > as dhcp-client.
> > > >
> > > > Here is my dchp-dump output from the server for eth1.
> > > >
> > > > The client gets ip# 192.168.0.20 and netmask 255.255.255.0.
> > >
> > > No, ;) the dhcp server sends a reply with those data. The question is if
> > > that package is received by the client. dhcp-dump on the client would
> > > reveil that.
> >
> > The dhcp-dump for the client never showed anything.
> 
> Sorry, my question was stupid. dhcp-dump does not run when the network is 
> down. ;)
> 
> > > BTW, can you setup a static ip# on the client?
> 
> > When I log in from the client on the server via ssh it works with a
> > static ip#. But nothing else. 
> 
> Not even ping? Ping host -> client, ping client -> host?
> 
> > Do I have to configure the firewalls on both machines differently for dhcp?
> 
> Perhaps turn the firewalls of during testing. If all works well, you can turn 
> them on. If consequently something breaks, you know it's the firewall. ;) You 
> probably need the firewall later to reach the WWW, because of its 
> masquerading/NATting.
> 
> > On the server it does IP forwarding and masquerading and allows ssh and
> 
> As your dhcp server also serves as a router, you have to turn on IP forwarding 
> in /etc/sysconfig/sysctl:
> 
> IP_FORWARD="yes"
> 
> cat /proc/sys/net/ipv4/ip_forward should output a single '1'. If not, set it 
> manually with:
> 
> echo '1' > /proc/sys/net/ipv4/ip_forward
> 
> If you have put the firewall down on the host, then check this.
> 
> > On the client I use the setings I always use to get internet
> > connections. It's a laptop and has been connected to various networks
> > with this configuration. So I guess I still make a mistake on the
> > server, right?
> 
> AFAICS: Right.
> 
> Well, that is, unless you hand out your ip# conditionally, in which case the 
> client has to fullfill a certain condition (e.g. send a client-id). But you 
> hand them out unconditionally, so no worries about that.

Some other thought. How should my dhcp-server match the ip# and netmask
of my internet connection at eth0?

eth0 has ip# xxx.xxx.22.104 netmask 255.255.255.128.
eth1 is configured with ip# 192.168.0.1 netmask 255.255.255.0
router just has ip forwarding
router option is currently 192.168.0.1 (maybe rather eth0 ip#)?

Cheers, Ulrich