Senthil,

> How to un load the lsm-packfil.so module?
I don't think that it's possible.  If you look at the io-pkt users guide
here:
http://www.qnx.com/developers/docs/6.4.1/io-pkt_en/user_guide/overview.h
tml

You will notice what it says in the following section:
-----
# mount and umount capabilities:

    * Only io-net drivers may be both mounted and unmounted. Other
drivers may allow you to detach the driver from the stack, by using the
ifconfig iface destroy command (if the driver supports it).
    * The IP stack is an integral part of io-pkt; you can't start io-pkt
without it. This means that you don't need to specify the -ptcpip option
to the stack unless there are additional parameters (e.g. prefix=) that
you need to pass to it. If you specify the -ptcpip option without
additional parameters, io-pkt accepts it with no effect.
    * Protocols and enhanced stack functionality (e.g. TDP, NAT / IP
Filtering) can be mounted, but not unmounted.
-----

Specifically the last sentence implies that this packet filter module
cannot be unmounted once it has been mounted.

Regards,

Eric