Re: Share internet connection/make a small server

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On Wed, 2005-08-31 at 12:20 -0700, Antonio Olivares wrote:
> 
> --- Antonio Olivares <olivares14031@xxxxxxxxx> wrote:
> 
> > 
> > 
> > --- Alexander Dalloz <ad+lists@xxxxxxxxx> wrote:
> > 
> > > Am Di, den 30.08.2005 schrieb Antonio Olivares um
> > > 15:02:
> > > 
> > > > > Make sure you have forwarding set on on the
> > > gateway
> > > > > host:
> > > > > 
> > > > > $ cat /proc/sys/net/ipv4/ip_forward
> > > > > 
> > > > > must print out "1" (without quotes). If it
> > does
> > > not,
> > > > > then activate it in
> > > > > /etc/sysctl.conf and run "sysctl -p". Make too
> > > sure
> > > > > the gateway does NAT
> > > > > by an iptables rule like:
> > > > > 
> > > > > iptables -A POSTROUTING -o eth0 -j MASQUERADE
> > > > > 
> > > > > [eth0 should be in your case the outgoing
> > > device]
> > > > 
> > > > eth0 is the incoming connection should eth1 be
> > the
> > > > outgoing.  I'm a little confused but getting
> > > there.
> > > 
> > > The device given with -o <device> has to be the
> > > public net device.
> > >  
> > > > [root@rio ~]# cat /proc/sys/net/ipv4/ip_forward
> > > > 1
> > > 
> > > Ok.
> > > 
> > > > [root@rio ~]# iptables -A POSTROUTING -o eth0 -j
> > > > MASQUERADE
> > > > iptables: No chain/target/match by that name
> > > 
> > > Sorry, my fault. Above should have been for the
> > NAT
> > > table (by default
> > > iptables takes the filter table):
> > > 
> > 
> > 
> === message truncated ===
> 
> I'm trying continually to solve this issue and I have
> tried with a windows2000 machine and I get this
> 

Reading thru what you have below, this seems to most certainly be a
routing/firewalling/masquerading issue on the linux box.

>From the windows box try this and let us know the results.
1. ping 192.168.100.1
2. ping 10.154.19.136

3. If both those work, then try a ping to 10.154.19.130 
   (the address you have assigned as DNS server)
if #1 works but #2 and/or #3 do not then this is an issue with the
routing/firewalling/masquerading on the Linux server.  

Per the contents you posted below this no longer seems an issue with
dhcp since the data is properly being assigned.



> [olivares@rio ~]$ cat /media/floppy/win2000info.txt
> 
> Windows 2000 IP Configuration
> 
>         Host Name . . . . . . . . . . . . :
> teacher-0by6j7s
>         Primary DNS Suffix  . . . . . . . :
>         Node Type . . . . . . . . . . . . : Broadcast
>         IP Routing Enabled. . . . . . . . : No
>         WINS Proxy Enabled. . . . . . . . : No
>         DNS Suffix Search List. . . . . . : domain.lan
> 
> Ethernet adapter Local Area Connection:
> 
>         Connection-specific DNS Suffix  . : domain.lan
>         Description . . . . . . . . . . . : 3Com
> EtherLink XL 10/100 PCI For Complete PC Management NIC
> (3C905C-TX)
>         Physical Address. . . . . . . . . :
> 00-01-03-DD-7D-74
>         DHCP Enabled. . . . . . . . . . . : Yes
>         Autoconfiguration Enabled . . . . : Yes
>         IP Address. . . . . . . . . . . . :
> 192.168.100.198
>         Subnet Mask . . . . . . . . . . . :
> 255.255.255.0
>         Default Gateway . . . . . . . . . :
> 192.168.100.1
>         DHCP Server . . . . . . . . . . . :
> 192.168.100.1
>         DNS Servers . . . . . . . . . . . :
> 10.154.16.130
>         Lease Obtained. . . . . . . . . . : Wednesday,
> August 31, 2005 12:10:34PM
>         Lease Expires . . . . . . . . . . : Thursday,
> September 01, 2005 12:10:34 PM
> [olivares@rio ~]$
> 
> what do I need to edit?
> how do I find out what is wrong?
> 
> Kind Regards and TIA,
> 
> Antonio
> 
> 
> 		
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