Ipfw fwd with route(8) RTF_BLACKHOLE and fast forwarding on FreeBSD 11

[Eugene Grosbein]

03.09.2018 14:02, Runer wrote:

> *Hello Community!
> 
> A situation has arisen in which ipfw fwd stops working when
> RTF_BLACKHOLE or RTF_REJECT, ROUTE (8), is enabled on Freebsd 11 release.
> **
> 
> FreeBSD 11.2-RELEASE-p1 route add default 127.0.0.1 -blackhole –iface ipfw show00100 30 4056 fwd 10.0.0.5 ip from table(1) to not 10.0.0.0/8 in via em0 The packet counter changes, but forwarding does not work.On FreeBSD 10 everything works fine. I suppose this is due to changes to forwarding -> fast forwarding by default in FreeBSD 11 and man ROUTE (8), “BUGS - unless IP fast forwarding is enabled, in which case the meaning of the flag will always be honored.”
> I want to know if it's possible to implement the work ipfw fwd together with RTF_BLACKHOLE on FreeBSD 11 as before in FreeBSD 10? Thank you in advance!
> 
> ***

Can you fill a Problem Report using https://bugs.freebsd.org/bugzilla/enter_bug.cgi please?
And drop me PR's number in reply.