LinuxSA Mailing list archives

  From: Jake Hawkes <jake@infinitylimited.net>
  To  : Andrew Williss <bigwill@riverland.net.au>
  Date: Sun, 29 Apr 2001 18:36:30 +0000

Re: What Have I done?

Andrew Williss wrote:

> My stuffing around has caused the following problems...
> I cannot get the windows machine to talk to the linux machine via samba.
> (although they can ping each other) I have NOT touched a single letter of the
> smb.conf ...

If you have been playing with firewall scripts, they may have tightened
up security like hosts.allow and hosts.deny.

Firewalls tend to block everything by default, and then only allow
connections on certain ports. I bet you'll find that your firewall has
blocked access to the netbios ports (137-139).

> The windows machine now won't talk to the internet.
> I am unable to enable internet connection sharing under DrakConf. (It says it
> is currently disabled)
> 
> I can ping the two machines to each other no problems so I reckon both NIC's
> and cable are ok...
> 
> When connected to the net, on the windows box I can ping the modem
> (203.87.1.xxx) i.e the ip address given to the modem by the isp.
> but I can't ping the primary DNS of the isp. (203.18.28.195)

sounds like a routing or ip-forwarding problem.

 
> I can surf the net ok from the linux box..as long as I have NO firewall
> running.
 
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
> 203.18.28.193   0.0.0.0         255.255.255.255 UH        0 0          0 ppp0
> 192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U         0 0          0 lo
> 0.0.0.0         203.18.28.193   0.0.0.0         UG        0 0          0 ppp0

this looks ok...

> 
> It is the same if a firewall is running...


When the firewall is running, perhaps you could show us the output of
ipchains -L -v


--
Jake Hawkes B.Eng, (CSE)

I hate people... people make me pro-nuclear. - M. Smith

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