Date: Fri, 17 Dec 1999 01:10:03 -0800 (PST) From: Ruslan Ermilov <ru@FreeBSD.ORG> To: freebsd-bugs@FreeBSD.org Subject: Re: misc/15515: Firewall/FIltering Problems Message-ID: <199912170910.BAA15004@freefall.freebsd.org>
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The following reply was made to PR misc/15515; it has been noted by GNATS.
From: Ruslan Ermilov <ru@FreeBSD.ORG>
To: matheny@cs.purdue.edu
Cc: freebsd-gnats-submit@FreeBSD.ORG
Subject: Re: misc/15515: Firewall/FIltering Problems
Date: Fri, 17 Dec 1999 11:04:26 +0200
On Thu, Dec 16, 1999 at 06:41:11AM -0800, matheny@cs.purdue.edu wrote:
>
> On a freebsd 3.3 firewall the ipfw rule is set to open. However,
> ports 137-139 appear as filtered when a portscan is done.
>
What do you mean by "appear as filtered"?
> We have checked with the DSL provider and the DSL modem manufacturer
> to see if the modem has filtering capabilities or the service provider
> filters and the answer to these questions was no.
> Question: Why would the ports come back with filtered if were not
> using a tcp wrapper and the firewall type is open?
>
Either you're using non-stock version of /etc/rc.firewall, or nothing
is listening on 137-139.
What do the following commands output:
# ipfw show
# netstat -an -finet | awk '$4 ~ "13[7-9]$" {print $0}'
Cheers,
--
Ruslan Ermilov Sysadmin and DBA of the
ru@ucb.crimea.ua United Commercial Bank,
ru@FreeBSD.org FreeBSD committer,
+380.652.247.647 Simferopol, Ukraine
http://www.FreeBSD.org The Power To Serve
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