Re: Suse 10 DNS, firewall, or masquerading problem?
- From: Ger <gp_lally@xxxxx>
- Date: Thu, 08 Dec 2005 23:04:05 +0000
On Thu, 08 Dec 2005 16:20:54 +0000, Ger wrote:
> Hello
> I have a small home LAN as follows:
>
>
> Firewall (Smoothwall - ext ISDN; int eth0)
> |
> Crossover cable
> |
> Proxy server (Suse 10 with Squid - ext eth0; int eth1)
> |
> Switch
> |
> Clients (Windows XP)
> |
> |
> On the firewall my external interface is dynamic (ISDN) Internal is
> 192.168.0.1
> Gateway is 192.168.0.1
>
> On Squid external is DHCP from Smoothwall (eg. 192.168.0.100) Internal is
> 192.168.40.1
> Gateway is 192.168.0.1
>
> The clients are set by DHCP from Squid
>
> I am not a Linux expert by any means, but I have successfully set up the
> Windows XP clients to go through Squid and Dansguardian on the proxy.
> However, as Squid is only a HTTP proxy I can't get access to my ISP'sPOP
> and news servers, at least from the clients. I can from Squid. I
> understand that to do this I need to enable NAT and packet forwarding on
> Squid.
>
> I *think* I have done this properly, but I am not sure. When I start
> Outlook on Windows and run Ethereal on Squid to capture the packets I see
> that my Windows clients can't find 192.168.0.1. The ARP broadcast just
> runs and runs with no answer, and they can't find the gateway. I have
> tried turning off the firewall on Squid, with no joy. I have tried to set
> up a caching DNS server on Squid, but I don't have enough expertise to
> know that what I am doing is right.
>
> Is there anyone who can help me resolve this please? I have looked and
> looked on the internet but it's difficult to trawl through all the
> questions and find the right answer.
>
> Some information that might be helpful: Ethereal capturing packets on
> Squid's internal interface while running Outlook Send/receive on Linux
> client: Windows PC sends DNS query mail.iol.ie Squid replies ICMP
> Destination unreachable (port unreachable) Windows then sends NetBIOS name
> query mail.iol.ie to 192.168.40.255 This request just loops
Update:
I have manged to get a local DNS caching server going I think. Capturing
on SuSE's external interface while trying an email Send\receive from a
Windows client shows me that the POP and SMTP mail servers are now being
resolved, but it only gets so far. Once it fixes upon the actual server IP
address everything stops??
What could this be? Somebody help -- please!!
.
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