It is not an ISO image! man vnconfig and/or man mdconfig (depending of 
you FreeBSD version) are your friends.

Alex

Gorm J. Siiger wrote:
> Hi there,
> 
> I have a CD-ROM m0n0wall installation which have great performance problems.
> 'All mbuf clusters exhausted, please see tuning(7)'
> 
> netstat -m on the devices tell me that I have to tune
> $ netstat -m
> 1184/2320/5696 mbufs in use (current/peak/max):
>         1177 mbufs allocated to data
>         7 mbufs allocated to packet headers
> 1158/1424/1424 mbuf clusters in use (current/peak/max)
> 3428 Kbytes allocated to network (80% of mb_map in use)
> 381 requests for memory denied
> 1 requests for memory delayed
> 0 calls to protocol drain routines
> 
> I would like to tune in boot/loader.conf:
> kern.ipc.nmbclusters="16384"
> 
> But I have no idea on how to change the m0n0wall ISO image!
> 
> Any thoughts are most welcome, as I have a wall that only work 50% of the
> time :)

>