IPFW Rule

[Tom Marchand]

On Nov 21, 2008, at 6:25 PM, Wojciech Puchar wrote:

>> I am trying to add a IPFW rule to forward traffic but I keep  
>> getting the message "ipfw: getsockopt(IP_FW_ADD): Invalid  
>> argument".  The rule I am trying to add looks like this:
>>
>> ipfw add 600 fwd 192.169.2.3, 6000 tcp from 192.169.2.3 to any 80
>>
>> I do have IP Forwarding enabled.  Any ideas what I am doing wrong?
>
> rule looks OK, but your message clearly suggest you DO NOT have IP  
> forwarding enabled

Interesting sysctl reports that forwarding is enabled:

$ sysctl -a |grep forward
net.inet.ip.forwarding: 1

IP forwarding is enabled in GENERIC isn't it?  I am running 6.1- 
RELEASE FreeBSD 6.1-RELEASE #0.