From owner-freebsd-security Thu Mar 30 6:17:35 2000 Delivered-To: freebsd-security@freebsd.org Received: from ns1.via-net-works.net.ar (ns1.via-net-works.net.ar [200.10.100.10]) by hub.freebsd.org (Postfix) with ESMTP id 1C67537B5F2 for ; Thu, 30 Mar 2000 06:17:25 -0800 (PST) (envelope-from fpscha@ns1.via-net-works.net.ar) Received: (from fpscha@localhost) by ns1.via-net-works.net.ar (8.9.3/8.9.3) id LAA04481; Thu, 30 Mar 2000 11:16:47 -0300 (GMT) From: Fernando Schapachnik Message-Id: <200003301416.LAA04481@ns1.via-net-works.net.ar> Subject: Re: FTP with firewall rules In-Reply-To: <20000329095845.54716@rdrop.com> from Alan Batie at "Mar 29, 0 09:58:45 am" To: batie@rdrop.com (Alan Batie) Date: Thu, 30 Mar 2000 11:16:47 -0300 (GMT) Cc: pccb@yahoo.com, freebsd-security@FreeBSD.ORG Reply-To: Fernando Schapachnik X-Mailer: ELM [version 2.4ME+ PL40 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org En un mensaje anterior, Alan Batie escribió: > On the other hand, it's not clear just what keep-state/check-state do > either; what is the difference between the example: > > ipfw add check-state > ipfw add deny tcp from any to any established > ipfw add allow tcp from my-net to any setup keep-state > > and > > ipfw add allow tcp from any to my-net established > ipfw add allow tcp from my-net to any This permits packets with ACK turned on, even if there wasn't a SYN before. The former doesn't. Regards. Fernando P. Schapachnik Administración de la red VIA NET.WORKS ARGENTINA S.A. fernando@via-net-works.net.ar (54-11) 4323-3333 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message