IPFW3 and IPv6

Matthias Play matthias_play at gmx.net
Sun Jan 3 05:48:03 PST 2016

Hi Bill,

thanks for your quick answer!

An NFS daemon is running on my server machine which I use to mount DFly 
source and obj dirs on my client machines. With NFS comes mountd and 
rpc* daemons that automatically also provide their service on IPv6 
ports. I did not find daemon flags to tell them only to use IPv4 so I 
would like to block unwanted traffic to these ports.

Would it be ok to also run ip6fw alongside with ipfw3?

If yes, I will set up a configuration file for ip6fw allowing all IPv4 
traffic and blocking all IPv6 traffic.


On 03.01.16 14:09, bycn82 wrote:
> Hi Happy New Year Matthias,
> not support IPv6 yet
> but yes i want to integrate with ip6fw as well.
> recently working on something related to voip. so did not find much time
> for BSD.
> Will support v6 once I remove the lock in NAT.
> Regards,
> Bill Yuan
> On Sunday, 3 January 2016, Matthias Play <matthias_play at gmx.net
> <mailto:matthias_play at gmx.net>> wrote:
>     Hi,
>     Happy New Year and all the Best in 2016!
>     I set up ipfw3 to filter network traffic on a local server and want
>     to filter all IPv6 traffic since I do not need it in my local network.
>     Is ipfw3 also filtering IPv6 traffic or only IPv4?
>     I am wondering because with the old ipfw implementation handling of
>     both IP versions is separated into two different firewall programs,
>     ipfw and ip6fw both being configured using distinct rc.conf variables.
>     If IPv6 filtering is not supported by ipfw3 would it be better to
>     configure a custom kernel without the INET6 option instead of using
>     ip6fw alongside with ipfw3?
>     Best Regards
>     Matthias

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