[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

RE: [K12OSN] new install help needed

Glad to hear it's working.  You can in fact set your DNS manually, but if DHCP can do it for you, yep, it's easier.

However, as I suspected, there is a potential routing issue here.  Both of your interfaces are in the subnet.  That's bad news, because you may find in the future that your server doesn't know which packets to route out which interface.  It is possible that your server could send out half the X11 packets out eth0 and the other half out eth1!

The last time I made this particular mistake, which was with K12LTSP 4.2.1 (FC3-based) and a very late night so that I was tired (that's my story and I'm stickin' to it), my clients could connect to my server just fine, but my server couldn't get out.  Why?  My main LAN also happens to use, and eth1 was configured for DHCP (the default K12LTSP setting).  The server thought that the default gateway for my network,, was reachable from eth0 and thus sent packets out eth0 to the Internet!  Oops....

Did I mention that I was really, REALLY tired that night?  :-) 

Note that many home routers are pre-configured for  The problem is that the K12LTSP default on eth0 is also  Thus, you have *two* possible paths to the default gateway--eth0 *and* eth1.  Now the server's gotta pick which one.  Basically, you got lucky, because, as your netstat -rn output shows, your server happened to choose eth1, but don't expect to be able to hook up a thick client to your eth0 segment and have things work.  What should be done during a dual-NIC LTSP server of any sort (including K12LTSP) is to choose an IP subnet for the clients that is different from the main LAN.  The server that I use for demos at schools currently uses, since nobody seems to choose that range (fingers crossed!).

BTW, despite the existence of OpenOffice.org, it's probably a good idea to submit attachments in something other than the proprietary MS Word doc format (e. g. RTF or even plain text).  This is, after all, a Free Software mailing list.  :-)

--Microsoft Free Since 2003

On Sun, 2005-11-06 at 14:28 -0500, Dick Kempton wrote:
Thank you for your reply.  It seems that by not automatically setting the DNS, all is well. Thanks again. This was a small but bugging problem.


-----Original Message-----
From: k12osn-bounces redhat com [mailto:k12osn-bounces redhat com]On Behalf Of Terrell Prudй, Jr.
Sent: Sunday, November 06, 2005 11:40 AM
To: Support list for opensource software in schools.
Subject: Re: [K12OSN] new install help needed


On Sun, 2005-11-06 at 11:25 -0500, Dick Kempton wrote:

I recently installed version 4.4.1 on my computer that only had one NIC. All worked fine and I was able to connect to my Road Runner connection thru a cable modem. 


When I installed a second NIC, a 3com 3cSOHO100-TX, the default set up connected to my client computer correctly.  But…now neither client nor server can connect to Internet.  Eth1 is set to DHCP and eth0 is set statically to


I even did a fresh install with both cards installed and used all of the defaults.  I still have no Internet access. How can I get eth1 to connect as it did previously before the second card was installed???


Thanks for any help.



Shoot us a copy of your "/sbin/ifconfig" and "netstat -rn" outputs.  I suspect a routing issue.


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]