Date: Fri, 18 Aug 2000 22:04:57 +0300 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: cjclark@alum.mit.edu Cc: "SILVER, MICHAEL A" <MSILVER@scana.com>, "freebsd-questions@FreeBSD.org" <freebsd-questions@FreeBSD.ORG> Subject: Re: Problem with FreeBSD behind a firewall Message-ID: <20000818220457.B358@hades.hell.gr> In-Reply-To: <20000817225922.G28027@149.211.6.64.reflexcom.com>; from cjclark@reflexnet.net on Thu, Aug 17, 2000 at 10:59:23PM -0700 References: <DBB3921EFE2AD211A81500A0C9B5FE760579457F@msg04.scana.com> <20000817225922.G28027@149.211.6.64.reflexcom.com>
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On Thu, Aug 17, 2000 at 10:59:23PM -0700, Crist J . Clark wrote: > On Thu, Aug 17, 2000 at 12:04:52PM -0400, SILVER, MICHAEL A wrote: > > I have a situation where my FBSD machine sits behind a hardware firewall and > > is inaccessible from the outside world. The problem is, it needs to be > > accessible. The HW firewall is setup to pass all traffic to a specific > > internet IP to the FBSD firewall, but this appears not to be happening, OR > > the FBSD machine is not responding properly. I need to find out which is > > the problem and correct it. (I don't have access to the HW firewall) > > Sniff (tcpdump) the external interface of the FreeBSD machine, > 10.0.0.20. Try to connect to it from the Internet. Watch the tcpdump > output and see if the packets are coming in. It is quite probable that I miss some subtle point here, but unless I am a complete fool, this address (10.0.0.20) belongs to the 10.0.0.0/8 block of IP's which most routers in Internet should recognize as a 'private network' address block and refuse to route from/to. I think that using a real IP address to the outside interface of the FreeBSD firewall is going to solve a lot of the problems at hand. -- Giorgos Keramidas, <keramida@ceid.upatras.gr> For my public pgp2 key: finger -l keramida@diogenis.ceid.upatras.gr To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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