From mboxrd@z Thu Jan 1 00:00:00 1970 From: lejeczek Subject: on the the two IPs unreachable if second interface is up Date: Fri, 25 May 2012 16:12:50 +0100 Message-ID: <4FBFA172.2060604@yahoo.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Return-path: Received: from nm16-vm0.bullet.mail.ukl.yahoo.com ([217.146.183.254]:37750 "HELO nm16-vm0.bullet.mail.ukl.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751305Ab2EYPMv (ORCPT ); Fri, 25 May 2012 11:12:51 -0400 Sender: netdev-owner@vger.kernel.org List-ID: hello everybody apologies if this may feel off the topic, I was hoping some net experts could shed some lights on some peculiar symptoms I experience with one linux box a BOX has two net interfaces, a public and private one public IP is reachable from/via the Internet just fine public IP is not reachable from the same private network the BOX's second interface is on public IP becomes reachable to private subnet immediately after second(private) interface was turned down BOX's firewall whether on or off makes no difference this is the most peculiar problem of this nature I've ever experienced the goal is simple, have other systems on the same private subnet as the BOX's second interface to be able to talk to the BOX's public IP default gateway for the private subnet is a separate another system. any suggestions as to how to troubleshoot it I would very! much appreciate many thanks!