From: Curtis Call <curtiscall@usa.net>
To: Ramin Dousti <ramin@cannon.eng.us.uu.net>,
Curtis Call <curtiscall@usa.net>
Cc: Marcel de Boer <marceldb@luon.net>, netfilter@lists.netfilter.org
Subject: Re: [Re: [FTP large file problem]]
Date: Fri, 18 Jul 2003 08:34:04 -0600 [thread overview]
Message-ID: <993HgRoIe8480S06.1058538844@cmsweb06.cms.usa.net> (raw)
See:
http://www.netfilter.org/documentation/HOWTO//packet-filtering-HOWTO-7.html#ss7.3
Scroll down to 'Specifying fragments'. Looks like whether it is reassembled
prior to the filter depends on a few different factors...
Anyway, I was having problems with a local firewall filter stalling my large
IMAP downloads. Permitting fragments did the trick...
Ramin Dousti <ramin@cannon.eng.us.uu.net> wrote:
> On Fri, Jul 18, 2003 at 07:47:29AM -0600, Curtis Call wrote:
>
> > Are you explicitly allowing fragments through? When a packet is
fragmented
> > only the first fragment contains the TCP/UDP header. So if you're only
> > permitting based on that header the fragments won't make it.
>
> Are you sure about this? Doesn't defrag occure on the fw by default?
Specially
> when you do nat it cannot work without this logic? And I don't recall any
> mention of "let fragments through" in the howto's or alike.
>
> Ramin
>
next reply other threads:[~2003-07-18 14:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-18 14:34 Curtis Call [this message]
2003-07-18 14:52 ` [Re: [FTP large file problem]] Ramin Dousti
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