Re: How to block a range of IPs?

[SaVaGE <pc-secure@home.nl>]

Op maandag 28 april 2003 19:52, schreef u:
> Op maandag 28 april 2003 19:41, schreef u:
> > Op maandag 28 april 2003 18:14, schreef John A. Sullivan III:
> > > You can  use the tool at http://subnetcreator.sourceforge.net/ to
> > > easily determine which subnets are contained in your IP address range. 
> > > The same logic is being built into the iptables+ management tool being
> > > developed in http://iscs.sourceforge.net/ .  However,even better,it
> > > appears there is a patch available in patch-o-matic that allows one to
> > > enter a range directly in iptables.  I haven't tried it yet but hope to
> > > do so soon to replace that logic in ISCS.  Good luck - John
> > >
> > > On Sun, 2003-04-27 at 10:06, netfilter-request@lists.netfilter.org
> > >
> > > wrote:
> > > > --__--__--
> > > >
> > > > Message: 4
> > > > From: "Afshin Lamei" <linux_st@hotmail.com>
> > > > To: netfilter@lists.netfilter.org
> > > > Subject: How to block a range of IPs?
> > > > Date: Sun, 27 Apr 2003 10:41:54 +0430
> > > >
> > > > Hi,
> > > > How can I write a rule for a custom range of IPs? for example, I want
> > > > to block every WWW packet incoming from eth1, which source is an IP
> > > > between 192.168.1.10 and 192.168.1.20.
> > > > please help me writing an example.
> > > > thank you
> > > > afshin
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > _________________________________________________________________
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> >
> > AT_HOME_RANGE="213.51.16.0/21 213.51.24.0/21"
> >
> >  ${ECHO} -n "Drop and log @HOME_USERS in range: "
> >     for athomerange in ${AT_HOME_RANGE} ; do
> >            ${IPTABLES} -A INPUT -i ${EXT_INTERFACE} -s ${athomerange} -m
> > limit \
> >                -j LOG --log-prefix "@HOME_USER:DROP "
> >           ${IPTABLES} -A @HOME_CHK -i ${EXT_INTERFACE} -s ${athomerange}
> > -j DROP
> >         ${ECHO} -n "${athomerange} "
> >   done
> >
> > this is an example off a line i use  , if you wish to have more ranges,
> > you have to make a new rule like this ,but another name like
> > "AT_HOME_RANGE2"
> >
> > good luck
> >
> > Pascal (PC-Secure)
>
> so in your picture it would be like this ::
>
>
> EXT_INTERFACE="eth1"
> IPTABLES="/usr/bin/iptables
> AT_HOME_RANGE="192.168.1.10/24 192.168.1.20/24"
>
>  ${ECHO} -n "Drop and log @HOME_USERS in range: "
>     for athomerange in ${AT_HOME_RANGE} ; do
>             ${IPTABLES} -A INPUT -i ${EXT_INTERFACE} -s ${athomerange} -m
>  limit \
>                 -j LOG --log-prefix "@HOME_USER:DROP "
>            ${IPTABLES} -A INPUT -i ${EXT_INTERFACE} -s ${athomerange} -j
>  DROP
>          ${ECHO} -n "${athomerange} "
>    done
>
> ready and go
>
> Pascal (PC-Secure)

ok i forgot your wish for the www port so here it is::

EXT_INTERFACE="eth1" # or INT_INTERFACE
IPTABLES="/usr/bin/iptables
AT_HOME_RANGE="192.168.1.10/24 192.168.1.20/24"

 ${ECHO} -n "Drop and log @HOME_USERS in range: "
    for athomerange in ${AT_HOME_RANGE} ; do
           ${IPTABLES} -A INPUT -i ${EXT_INTERFACE} -p all -s ${athomerange} \ 
	--dport 80 -m limit -j LOG --log-prefix "@HOME_USER:DROP "
           ${IPTABLES} -A INPUT -i ${EXT_INTERFACE} -p all -s ${athomerange} \
 	--dport 80 -j DROP
         ${ECHO} -n "${athomerange} "
   done