From: Thomas Woerner <twoerner@redhat.com>
To: netfilter-devel@vger.kernel.org
Subject: netfilter/iptables and network interface names
Date: Thu, 04 Feb 2010 13:58:15 +0100 [thread overview]
Message-ID: <4B6AC467.7020209@redhat.com> (raw)
Hello,
I just fell over network interface definitions in kernel and
netfilter/iptables.
Interfaces names in the kernel have few limits: Only spaces and slashes
are not allowed, but everything else, even Ctrl characters are.
In iptables, there are other limits: Colon, exclamation mark and
asterisk are not allowed. The plus is treated special for matching. But
what will be matched if the interface starts with or contains a plus?
iptables allows to use interfaces containing spaces and slashes.
iptables-save is not escaping interface names. The interface "+" will be
treated as no interface limit at all and will be dropped, therefore all
interfaces match.
I think there should be some discussion about interface names and limits
in kernel and netfilter/iptables.
What do you think?
Thanks in advance,
Thomas Woerner
next reply other threads:[~2010-02-04 12:58 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-04 12:58 Thomas Woerner [this message]
2010-02-04 14:29 ` netfilter/iptables and network interface names Jan Engelhardt
2010-02-04 14:31 ` Patrick McHardy
2010-02-04 14:46 ` Jan Engelhardt
2010-02-04 14:55 ` Patrick McHardy
2010-02-04 16:48 ` Jan Engelhardt
2010-02-04 16:49 ` Patrick McHardy
2010-02-04 18:44 ` Jan Engelhardt
2010-02-05 10:27 ` Patrick McHardy
2010-02-09 11:44 ` Jan Engelhardt
2010-02-05 10:32 ` Patrick McHardy
2010-02-09 15:00 ` Patrick McHardy
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