From: "Jörg Harmuth" <harmuth@mnemon.de>
To: netfilter@lists.netfilter.org
Subject: Re: Blocking a range of source IPs to a specific port
Date: Tue, 02 Aug 2005 10:26:49 +0200 [thread overview]
Message-ID: <42EF2E49.5030302@mnemon.de> (raw)
In-Reply-To: <42EE9CA0.5020805@blackicehosting.com>
James Harrison schrieb:
> However i'm still completely confused on the whole 0/9 issue- what does
> this specify?
We're talking about the notation 172.128.0.0/9 or shorter 172.128/9 or
similar. The part after the slash is the subnetmask (netmask). It is the
number of binary 1s starting from the left. 9 means the same as
255.128.0.0. The first octett has all bits set to 1 => 255, the second
only the first bit => 128 and all others are 0 => 0 ;)
HTH,
Joerg
next prev parent reply other threads:[~2005-08-02 8:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <42EE63E6.6070801@blackicehosting.com>
2005-08-01 20:36 ` Blocking a range of source IPs to a specific port R. DuFresne
[not found] ` <42EE9539.4070800@gmx.co.uk>
[not found] ` <Pine.LNX.4.60.0508011801000.3645@darkstar.sysinfo.com>
[not found] ` <42EE9CA0.5020805@blackicehosting.com>
2005-08-02 8:26 ` Jörg Harmuth [this message]
2005-08-02 13:35 ` Sp0oKeR
2005-08-02 13:20 James A Harrison
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