From: "James Pearson" Subject: Problems with Mac clients mounting a Linux server behind a firewall Date: Fri, 19 Dec 2008 22:52:22 +0000 Message-ID: Reply-To: james-p-5Ol4pYTxKWu0ML75eksnrtBPR1lH4CV8@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 To: linux-nfs@vger.kernel.org Return-path: Received: from mail-ew0-f17.google.com ([209.85.219.17]:38940 "EHLO mail-ew0-f17.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754473AbYLSWwY (ORCPT ); Fri, 19 Dec 2008 17:52:24 -0500 Received: by ewy10 with SMTP id 10so1313330ewy.13 for ; Fri, 19 Dec 2008 14:52:22 -0800 (PST) Sender: linux-nfs-owner@vger.kernel.org List-ID: I'm not absolutely sure if this is an NFS server issue, but I have an Linux NFS server running CentOS4 that sits behind a firewall - about once a week rpciod ends up using 99% CPU and the machine needs to be rebooted When it gets into this state, running 'netstat -u -a' shows thousands of entries like: udp 0 0 *:35071 *:* udp 0 0 *:34815 *:* udp 0 0 *:34559 *:* udp 0 0 *:34303 *:* udp 0 0 *:34047 *:* udp 0 0 *:33791 *:* udp 0 0 *:33535 *:* udp 0 0 *:33279 *:* udp 0 0 *:33151 *:* udp 0 0 *:32895 *:* and tcpdump shows lots of udp connection attempts to port 111 on various Macs that are or have mounted the server (via an automounter). The connections don't get through as they are blocked by the firewall. None of these blocked connections are to Linux clients - it's just Mac clients Is there anything that NFS server-wise that could be cause the server to attempt to contact clients in this way? Thanks James Pearson