From mboxrd@z Thu Jan 1 00:00:00 1970 From: Seb James Subject: NFS (and NIS) client causes server to semi-hang Date: 12 Jun 2003 11:17:41 +0100 Sender: nfs-admin@lists.sourceforge.net Message-ID: <1055413060.1984.34.camel@circle.hypercube> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from s4.uklinux.net ([80.84.72.14] helo=mail2.uklinux.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 19QP9Q-0000fZ-00 for ; Thu, 12 Jun 2003 03:17:48 -0700 Received: from localhost (s4.uklinux.net [127.0.0.1]) by mail2.uklinux.net (Postfix) with ESMTP id 491D4409FD7 for ; Thu, 12 Jun 2003 10:17:45 +0000 (UTC) Received: from mail2.uklinux.net ([127.0.0.1]) by localhost (s4.uklinux.net [127.0.0.1:10024]) (amavisd-new) with ESMTP id 11427-05 for ; Thu, 12 Jun 2003 11:17:43 +0100 (BST) Received: from [192.168.0.2] (unknown [195.137.117.140]) by mail2.uklinux.net (Postfix) with ESMTP id 65742409FC2 for ; Thu, 12 Jun 2003 10:17:43 +0000 (UTC) To: NFS Mailing list Errors-To: nfs-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Unsubscribe: , List-Archive: Hello, I've come across a rather worrying problem. I have a small network of computers, sitting behind a adsl modem/router. The internal ip domain is hypercube, I have also called the yp domain hypercube as it is the identical set of machines. The server is: circle.hypercube nis server, nfs fileserver, dhcp server, firewall. I know it shouldn't be a firewall at the same time as all those other functions, but it is for now as I want to use it as a stand alone machine if nothing else is running. It's running redhat 7.2, fully updated with security patches. Kernel version is 2.4.20-18.7 (a redhat precompiled kernel). The two clients are: darius: desktop machine running fully updated redhat 9.0 installation herodotus: a laptop also with updated redhat 9.0. Herodotus is set up to mount /home and a directory called /data from circle, with the following lines in /etc/fstab: circle:/data /data nfs defaults 0 0 circle:/home /home nfs defaults 0 0 It is also set up as an nis client, with the following in /etc/yp.conf domain hypercube server circle.hypercube And it works just fine, so I believe the server is correctly set up. Darius has the same set-up as herodotus, but...... Neither nfs nor ypbind function. Trying to mount a volume: [root@darius /]# mount /data/ pmap_getmaps rpc problem: RPC: Timed out mount: RPC: Port mapper failure - RPC: Timed out [root@darius /]# NB: a portmapper is running on both darius and circle (and herodotus, too). Trying to start ypbind: [root@darius /]# service ypbind start Setting NIS domain name hypercube: [ OK ] Binding to the NIS domain: [ OK ] Listening for and NIS domain server........ [FAILED] [root@darius /]# Now, when I try to do *either* of these, the server starts to play up. It begins to timeout on almost anything network or authentication related. For example, to bring up a new terminal window in X takes at least a minute and to then access a website using, say lynx, takes a similar time. I'm confused as to why both ypbind and mounting a volume on the server should be able to cause this denial of service. Does anyone have any ideas? Also, is there a suitable NIS related list to post this message to, as I think it's relevant for that, too. best regards, Seb James. -- Seb James ------------------------------------------------------- This SF.NET email is sponsored by: eBay Great deals on office technology -- on eBay now! Click here: http://adfarm.mediaplex.com/ad/ck/711-11697-6916-5 _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs