about IPFW

[aeav]

well, I have a mistake, when I try to execute these commands:

cmd="ipfw -q add"
interface="em0"

# bloqueiar o netbios
$cmd 0021 deny tcp from any to any 137 in via $interface
$cmd 0022 deny tcp from any to any 138 in via $interface
$cmd 0023 deny tcp from any to any 139 in via $interface
$cmd 0024 deny tcp from any to any 81 in via $interface


the system give-me it:

root@server01:~$sh firewall.sh
ipfw: getsockopt(IP_FW_ADD): Protocol not available
ipfw: getsockopt(IP_FW_ADD): Protocol not available
ipfw: getsockopt(IP_FW_ADD): Protocol not available
ipfw: getsockopt(IP_FW_ADD): Protocol not available
ipfw: getsockopt(IP_FW_ADD): Protocol not available
ipfw: getsockopt(IP_FW_ADD): Protocol not available
ipfw: getsockopt(IP_FW_ADD): Protocol not available

How can I resolve it?

thank you

[bwkaz]

ipfw?

em0?

Is this Linux, or some other OS? Linux's firewall tool is "iptables", not "ipfw", and its Ethernet interfaces are named "ethX", not "emX".

Just so we know what we're dealing with...

[aeav]

hum.. ok...
I'll search in another place...
thank you..

I'm configurating a machine with FreeBSD

[X_console]

This might be of some help. (http://lists.freebsd.org/pipermail/freebsd-ipfw/2004-September/001356.html)

[Gertrude]

You most likely never compiled support for it into your kernel. This is all covered in the FreeBSD handbook..

http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/firewalls.html