How to permanently set a network interface to promiscuous mode?

[Mertens, Bram]

Josh

Thanks for the input I'll have a closer look at this but it looks
promising!

Regards

Bram

> 


Mazda Motor Logistics Europe NV, Blaasveldstraat 162, B-2830 Willebroek
VAT BE 406.024.281, RPR Mechelen, ING  310-0092504-52, IBAN : BE64 3100 0925 0452, SWIFT : BBRUBEBB

-----Original Message-----
> From: redhat-list-bounces at redhat.com 
> [mailto:redhat-list-bounces at redhat.com] On Behalf Of Joshua Gimer
> Sent: donderdag 2 augustus 2007 17:34
> To: General Red Hat Linux discussion list
> Subject: Re: How to permanently set a network interface to 
> promiscuous mode?
> 
> What about adding support for PROMISC yourself in an init 
> script that  
> runs after "network". Maybe something like:
> 
> #!/bin/bash
> 
> cd /etc/sysconfig/network-scripts/
> 
> interfaces=`ls ifcfg* | LANG=C egrep -v '(ifcfg-lo|:|-range|rpmsave| 
> rpmorig|rpmnew)' | \
>              LANG=C egrep -v '(~|\.bak)$' | \
>              LANG=C egrep 'ifcfg-[A-Za-z0-9\._-]+$' | \
>              sed 's/^ifcfg-//g' |
>              sed 's/[0-9]/ &/' | LANG=C sort -k 1,1 -k 2n | 
> sed 's/ //'`
> 
> for i in $interfaces
> do
>          PROM=$(egrep -i 'promisc' ifcfg-$i | awk -F"=" '{ 
> print $2 }')
> 
>          if [ "$PROM" = "yes" ];
>          then
>                  /sbin/ifconfig $i promisc
>          fi
> done
> 
> Or you can add support for it in /etc/sysconfig/network-scripts/ifup- 
> post, something like:
> 
> PROM=$(egrep -i 'promisc' ifcfg-${DEVICE} | awk -F"=" '{ print $2 }')
> 
> if [ "$PROM" = "yes" ];
> then
>          /sbin/ifconfig ${DEVICE} promisc
> fi
> 
> at the end of the file before exit 0.
> 
> Josh
> 
> On Aug 1, 2007, at 1:42 AM, Mertens, Bram wrote:
> 
> > Hi,
> >
> > We need to configure a network interface on one of our machines so  
> > that
> > it always gets set to promiscuous mode.
> >
> > So far I have manually issued "ifconfig eth1 promisc" but I wouldn't
> > like to do this every time the interface has been brought 
> down and up
> > again.  According to /usr/share/doc/initscripts-7.93.25.EL/ 
> > sysconfig.txt
> > there used to be a "PROMISC=yes" option that could be used in the
> > "/etc/sysconfig/network-scripts/ifcfg-eth1" file but 
> apparantely this
> > option is deprecated and the file reads "To properly set 
> these, use  
> > the
> > packet socket interface."
> >
> > So far I haven't been able to find any documentation on this packet
> > socket interface.  How can I configure this netwxork interface to  
> > always
> > come up in promiscuous mode?
> >
> > Thanks in advance.
> >
> > Bram
> >
> >
> >
> > Mazda Motor Logistics Europe NV, Blaasveldstraat 162, B-2830  
> > Willebroek
> > VAT BE 406.024.281, RPR Mechelen, ING  310-0092504-52, IBAN : BE64  
> > 3100 0925 0452, SWIFT : BBRUBEBB
> >
> >
> > -- 
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