Determine ip address on tun0 for use with ipfw

Marco Radzinschi marco at
Sat Mar 29 08:11:18 PST 2003

On Sat, 29 Mar 2003, Martin Moeller wrote:

> Hello, list!
> I just read some documentation on ipfw, and also found example
> configuration files that can be used as a template.
> Now, I'm sitting in front of such a file and want to adapt it for
> my needs. But the first problem is already there:
> The file uses variables for the inside and outside interfaces.
> The inside interface is clear: It uses a normal 192.168.. address. But
> the outside interface is a DSL modem. The ethernet card is vr0 and uses
>, but the actual interface needed here is tun0 which gets a new
> ip address every time the PPP connection is established.
> How can I get my ip address into my rc.firewall script?
> Regards,
> Martin
> --
> Martin Möller <mm at>
> GnuPG/PGP DSA ID: 0x3C979285                  ICQ # 82221572
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ext_if_address=`ifconfig $ext_if | grep "inet " | awk '{print $2}'`

Marco Radzinschi
marco at

"Among those who dislike oppression are
many who like to oppress." - Napoleon Bonaparte

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