Date: Sat, 21 Nov 2009 16:27:20 +0100 From: Matthias Apitz <guru@unixarea.de> To: Victor Lyapunov <fullblaststorm@gmail.com> Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: sending mail with attachments always fail (FreeBSD/pf) Message-ID: <20091121152720.GA3878@current.Sisis.de> In-Reply-To: <6c51dbb10911210659t2e7b87dcg66d71544312d4172@mail.gmail.com> References: <6c51dbb10911210659t2e7b87dcg66d71544312d4172@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
El día Saturday, November 21, 2009 a las 08:59:12PM +0600, Victor Lyapunov escribió: > Hi all, > > I have production network with FreeBSD box acting as firewall. The > problem emerge as soon as users send mail with attachments. (Sending > mail without attachments always succeeds). Basically, when a user > tries to send a message, only part of it transmitted before connection > is interrupted and sending fails. The problem persists only when pf is > enabled. I think concerning TCP/IP there is no diff between a mail with or w/o attachment, it is just talking SMTP to a remote server and only the size, i.e, the number of IP pkgs, differs; the content is anyway; > My ruleset: > scrub in all fragment reassemble > block drop on em0 all > pass inet proto tcp from 192.168.0.0/24 to any port = smtp flags S/SA keep state > pass inet proto tcp from 192.168.0.0/24 to any port = pop3 flags S/SA keep state > pass inet proto tcp from 192.168.0.0/24 to any port = imap flags S/SA keep state > pass inet proto tcp from 192.168.0.0/24 to any port = smtps flags S/SA > keep state > pass inet proto tcp from 192.168.0.0/24 to any port = pop3s flags S/SA > keep state > pass proto udp from any to any port = domain keep state I never used S/SA as flags in my rules, only S. More I can' see. HIH (if not watch with some tcpdump(1) what's going on between the NIC and the remote server). matthias -- Matthias Apitz t +49-89-61308 351 - f +49-89-61308 399 - m +49-170-4527211 e <guru@unixarea.de> - w http://www.unixarea.de/ Vote NO to EU The Lisbon Treaty: http://www.no-means-no.eu
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20091121152720.GA3878>