This may be a horrible kludge (I dunno - not much of a scripter), but here
goes:
1. Write the first portion of your filter (up to the IP address) into a
file (i.e. /etc/LaBrea.tmp) - contents for mine would be:
tcp dst port 80 or 21 and dst host
2. Create a script (i.e. /etc/ipupdate) that writes the filter and checks
the IP of the external interface (eth0 on my box, change if needed). The
script's contents should look like this:
#Creates /etc/LaBrea.bpf
#!/bin/sh
cat filter > /etc/LaBrea.bpf
ip addr show eth0 | grep "inet " | sed s/" "// | cut -d' ' -f 2 | cut
-d'/' -f1 >> /etc/LaBrea.bpf
#Done
(that should only be 2 lines - not 3 - the second line wrapped)
3. Chmod /etc/ipupdate to 744 (command would be "chmod 744 /etc/ipupdate"
to do this).
4. Edit the dhclient-exit-hooks to with the following changes:
# Reload networking to see new address
reload_all
Add a line so you have
# Reload networking to see new address
reload_all
/etc/ipupdate
Save the file and it _should_ work (of course I can't test whether it works
or not as my ip hasn't changed in over a year). If anyone sees any obvious
mistakes please point them out.
S
>From: Steve Jeppesen <[EMAIL PROTECTED]>
>To: "Simon Bolduc" <[EMAIL PROTECTED]>, leaf-user
><[EMAIL PROTECTED]>
>Subject: Re: [Leaf-user] Unused IP's with LaBrea
>Date: Sun, 17 Feb 2002 17:38:19 -0600
>
>On Sun, 17 Feb 2002 17:27:21 -0500
>"Simon Bolduc" <[EMAIL PROTECTED]> wrote:
>
> > As long as you aren't dynamic you can always just use these settings in
>the
> > options file:
>
>Thats the problem so far, I have a dynamic IP. Suppose I could just
>monitor my IP and change it manually.
>However that doesn't cut it in case it changes in the middle of the night
>;) I have never created a script, but that sounds like the way to go like
>Charles suggested - a script to monitor the IP assigned to eth0, and when
>it changes have the script update the /etc/LaBrea.bpf
>
>If writing script is anything like Lisp code for AutoCAD, then I have a
>chance at creating one!
>However, I am going to study what has been suggested before ever getting to
>the point of letting LaBrea loose on the LRP box.
>
> >
> > # Options for start/restart the daemons
> > OPTIONS="-i eth0 -l -v -p 80000 -z -x -F /etc/LaBrea.bpf"
> >
> > and this is my /etc/LaBrea.bpf:
> >
> > tcp dst port 80 or 21 and dst host my.ext.ip.address
> >
> > and then you won't upset your neighbours/ISP, and don't have to have
>another
> > machine running all the time.
>
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