Date: Tue, 28 Dec 2021 13:49:59 -0600 From: Alex Thomas <karlthane@gmail.com> To: questions@freebsd.org Subject: Re: PF and tun1 Message-ID: <CABMOuVegdDcuxC9QnWusO7T6ysDvRyrqcQsvOS7XEAoftmQc2A@mail.gmail.com> In-Reply-To: <CAOyJeZTLdocx0tKujMU0=CGnDVCQT_Lj9MwE%2BYKJEpLk1Ft4uA@mail.gmail.com> References: <CABMOuVfxHtXzR0EC7P1h1KPYjpyxX9FnTyexLW4sThDpaE8PfA@mail.gmail.com> <5f2cca65-daab-989c-5fd0-6a5373f5bd56@pp.dyndns.biz> <CABMOuVer0Dy1D0sMAjTJCFee%2B9Lpjo8899c6KKOZyHtwZCh%2Bgg@mail.gmail.com> <CAOyJeZTLdocx0tKujMU0=CGnDVCQT_Lj9MwE%2BYKJEpLk1Ft4uA@mail.gmail.com>
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After every change I did a pfctl -f /etc/pf.conf.
On Tue, Dec 28, 2021 at 1:41 PM Shamim Shahriar
<shamim.shahriar@gmail.com> wrote:
>
> Have you tried reloading pf rules once tun1 is active/up?
>
> On Tue, 28 Dec 2021, 19:35 Alex Thomas, <karlthane@gmail.com> wrote:
>>
>> I have tried that, and have commented out the table for rfc6890 and
>> the rules for it. Still not having any success.
>>
>> On Tue, Dec 28, 2021 at 1:28 AM Morgan Wesstr=C3=B6m
>> <freebsd-database@pp.dyndns.biz> wrote:
>> >
>> > On 2021-12-28 02:55, Alex Thomas wrote:
>> > > I am trying to get nebula working on tun1 with pf as my firewall. If=
I
>> > > turn pf off, everything works. How to I tell pf to ignore / let
>> > > everything pass on the tun1 device.
>> > >
>> > > vtnet0 =3D "vtnet0"
>> > > nebula1 =3D "tun1"
>> > > icmp_types =3D "{ echoreq unreach }"
>> > > table <bruteforce> persist
>> > > table <rfc6890> { 0.0.0.0/8 10.0.0.0/8 100.64.0.0/10 127.0.0.0/8
>> > > 169.254.0.0/16 \
>> > > 172.16.0.0/12 192.0.0.0/24 192.0.0.0/29 192.0.2.0=
/24
>> > > 192.88.99.0/24 \
>> > > 192.168.0.0/16 198.18.0.0/15 198.51.100.0/24
>> > > 203.0.113.0/24 \
>> > > 240.0.0.0/4 255.255.255.255/32 }
>> > >
>> > > set skip on lo0
>> > > set skip on tun1
>> > > set skip on $nebula1
>> > > scrub in all fragment reassemble max-mss 1440
>> > > antispoof quick for $vtnet0
>> > > block in quick on egress from <rfc6890>
>> > > block return out quick on egress to <rfc6890>
>> > > block all
>> > > pass in on $vtnet0 proto tcp to port { 22222 } \
>> > > keep state (max-src-conn 15, max-src-conn-rate 3/1, \
>> > > overload <bruteforce> flush global)
>> > > pass out proto { tcp udp } to port { 22 53 80 123 443 }
>> > > pass out inet proto icmp icmp-type $icmp_types
>> > >
>> >
>> > In my experience the skip rules only work on interfaces that are avail=
able when
>> > pf starts, which excludes tun-interfaces. I don't know if this is by d=
esign.
>> > Remove your skip rules for tun1 and $nebula1 and just add a pass rule =
for that
>> > interface:
>> >
>> > pass on tun1 all
>> >
>> > Additionally, since you're quick blocking all traffic to and from priv=
ate IP
>> > addresses, make sure you don't use any of those IP addresses on tun1.
>> >
>> > /Morgan
>> >
>>
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