Thanks, that fixed the problem!!! Somehow I had messed up the iptables configuration file.
Michael Michael Edwards schrieb: > You need to set up ip masq on he head node so that it knows how to > route outside signals to the compute nodes. > > OSCAR does not do this. > > Here is a howto on the subject: > http://www.linux.org/docs/ldp/howto/IP-Masquerade-HOWTO/index.html > > On Fri, Jun 27, 2008 at 7:00 AM, Michael Oevermann > <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > Hi, > > we have a problem with login to the nodes via ssh. We have some > "normal" > users on the head node with > their home directories under > /home/<username>, > but most users have their home directories mounted from a different > machine - lets call it nfshome with IP 130.xxx.xxx.xxx - to > /Users/<username> > on the headnode. > > Both, the head node and the nodes itself have the following line in > their /etc/fstab > > 130.xxx.xxx.xxx:/Volumes/XRaid00/users /Users nfs > defaults 0 0 > > The nodes also have the line > > nfs_oscar:/home /home nfs rw 0 0 > > > The nodes are able to automount the user home directories sitting > directly on the > head node (/home/<username>) and those users can access the nodes via > ssh without > passwd. > > However, the nodes fail to mount the nfs mounted home directories > 130.xxx.xxx.xxx:/Volumes/XRaid00/users. The error in boot.log is, > e.g., > > Jun 26 18:32:23 n01 mount: mount: mount to NFS server '130.xxx.xx.xx' > failed: System Error: Connection timed out > > I wonder how this can work at all. The head node and the nfshome > machine > both have public IP's 130.xxx.xxx.xxx > so it is no problem for the head node to mount the user home > directories > from nfshome. > However, the nodes are not connected to the public net, they sit - as > usual - in a subnet 192.168.100.xxx > connected to the headnode. > From the nodes itself it is even impossible to ping the nfshome > machine > which means that a > > mount -t nfs 130.xxx.xxx.xxx:/Volumes/XRaid00/users /Users > > on the nodes is not possible. > > Question: What is the correct setup (on head node and/or nodes) > that the > nodes > > a) mount the user home directories > 30.xxx.xxx.xxx:/Volumes/XRaid00/users > under /Users > b) users can access the nodes via ssh (I assume if a) is fixed b) is > fixed as well) > > > > Thanks for any help! > > MIchael > > ------------------------------------------------------------------------- > Check out the new SourceForge.net Marketplace. > It's the best place to buy or sell services for > just about anything Open Source. > http://sourceforge.net/services/buy/index.php > _______________________________________________ > Oscar-users mailing list > Oscar-users@lists.sourceforge.net > <mailto:Oscar-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/oscar-users > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > Check out the new SourceForge.net Marketplace. > It's the best place to buy or sell services for > just about anything Open Source. > http://sourceforge.net/services/buy/index.php > ------------------------------------------------------------------------ > > _______________________________________________ > Oscar-users mailing list > Oscar-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/oscar-users > ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Oscar-users mailing list Oscar-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/oscar-users