2011/4/7 Ermal Luçi <e...@freebsd.org> > On Thu, Apr 7, 2011 at 10:21 AM, Quentin Narvor > <quentin.nar...@gmail.com> wrote: > > Hello, > > > > My name is Quentin Narvor and I am currently working on intrusion > detection. > > I use Freebsd 8.2 and I recently needed pf to be able to dynamically fill > in > > tables according pass rule. > > > > For performances reasons, I didn't want to do it with a script and pfctl. > > Then, with the help of Mr Nicolas Greneche, I made this patch named > "add". > > It enables pf to add src ip or dst ip in a table when a match occurs on a > > pass rule. > > > > I cannot see, apart collecting ips in tables, anything else that > cannot be done through pf(4) tags! > Can you please describe a use case for this patch?
Indeed, it enables pf to change its behaviour toward some hosts dynamically. I will build a blacklist of ip which have been recognized as compromized (botnets, spam, etc). I build a table with thoses IP. If I match a connection between one host of my internal network and one blacklisted ip, there are chances that this host is infected. I want to do a comprehensive capture of this host connections by adding src ip to a table of hosts to watch. A dup-to rule dump traffic from "host to watch" table to a sensor. Here are the rules : pass in on $int_if from any to <blacklist> add ipsrc <infected_hosts> pass in on $int_if dup-to ($sensor_if, sensor_ip) from <infected_hosts> to any Unless I miss something, I think it is not possible to make this example just with pf(4) tags : it would have been possible if I wanted to copy only the traffic between my hosts and botnets. > > I submit this patch to your attention. Is this feature is of interest to > be > > added in PF mainstream ? > > > > You will find the patch and its documentation in attachment. > > Let me know if you think that some modifications are needed. > > > > Best regards, > > > > Quentin Narvor > > > > _______________________________________________ > > freebsd-net@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-net > > To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org" > > > > > > -- > Ermal > _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
