testing 11.0-RC1 vnet jails with ipfilter
lars.engels at 0x20.net
Wed Aug 17 07:22:49 UTC 2016
On Tue, Aug 16, 2016 at 09:05:28PM -0400, Ernie Luzar wrote:
> Bjoern A. Zeeb wrote:
> > On 16 Aug 2016, at 21:08, CyberLeo Kitsana wrote:
> >> On 08/16/2016 03:21 PM, Ernie Luzar wrote:
> >> <snip>
> >>> Issuing "ipf -FS -Fa" command from within the vnet jail gives this
> >>> message, "open device:no such file or directory. User kernel version
> >>> check failed.
> >> According to ipf(8), the ipfilter utilities touch /dev/ipauth , /dev/ipl
> >> , and /dev/ipstate . Have you checked that the devfs ruleset applied to
> >> your jail has those unhidden?
> >>> Issuing "ipfstat -hnio command from within the vnet jail gives this
> >>> message, open(IPSTATE_NAME):no such file or directory.
> >> ipfstat(8) also lists /dev/kmem ; I suspect that including this may be a
> >> bad idea.
> > /dev/kmem is a bad idea; I should go and check what it is using it for
> > and if needed we should fix that.
> > I guess the general thing is that we might want to create another
> > default set of devfs rules which include additional nodes we now
> > consider safe inside VNET jails; the jail.conf still needs to know the
> > right ruleset to apply, so the jail.conf would need to specify the other
> > devfs_ruleset=“..” for vnet jails. Maybe Jamie could then come up with
> > an intelligent solution that would automatically flip things if option
> > vnet is set? I guess jail.conf(5) will need more examples for these
> > things as well.
> > /bz
> If thats the road you are thinking of going down, then we have to look
> at the big picture. Is another rule set say number 5 that includes rule
> set number 4 plus the nodes for ipfilter, pf, and ipfw. Or maybe a
> separate rule set for each firewall which is more secure.
> There is no way jail(8) could know which firewall if any was going to be
> run in the vnet jail to select the correct rule if there were separate
> rules for each firewall. A combined rule set containing everything
> needed for all 3 firewalls would be something jail(8) could auto default
> to if vnet option was coded.
> In light of 11.0 release being published soon there should be something
> posted to the release notes talking about this with sample code for a
> combined rule #5. This would give vnet users a copy & paste solution to
> use until jail(8) gets updated in 11.1.
> I tried this rule set in /etc/devfs.rules
> add include $devfsrules_jail
> add path /dev/ipl unhide
> add path /dev/ipauth unhide
> add path /dev/ipstate unhide
I think you have to remove '/dev/'
> Boot time get error message that this was invalid.
> If I could get a correct syntax combined rule #5 file, I could continue
> testing all 3 firewalls using 11.0-RC1.
> Your help would be greatly appreciated.
> freebsd-jail at freebsd.org mailing list
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