Op 02-11-2024 om 16:30 schreef Dries Michiels:
Hello,
So I have a very basic ruleset, as described in the FreeBSD handbook, see below. I have
"blurred" my open ports as seen in the ruleset below.
Igc0 is my WAN port and in the table "trusted_if" are like my LAN if and some
bridges.
00001 reass ip from any to any in
00010 allow ip from any to any via table(trustedif)
00050 deny log ip from any to any not antispoof in
00100 nat 1 ip4 from any to any in recv igc0
00500 skipto 10000 tcp from any to any out xmit igc0 setup keep-state :default
00501 skipto 10000 udp from any to any out xmit igc0 keep-state :default
05000 allow tcp from any to me *some open ports* in recv igc0 setup keep-state
:default
05001 allow udp from any to me *some open ports* in recv igc0 keep-state
:default
09998 deny log tcp from any to any
09999 deny log udp from any to any
10000 nat 1 ip4 from any to any out xmit igc0
65535 allow ip from any to any
Now comes the tricky part. There are some applications that don't work
correctly with this ruleset.
For example, itsme (belgium application) to identify yourself with a lot of
accounts, does not work.
Recently my banking website also stopped working. So now I'm wondering how do I
start to troubleshoot this issue?
Are there any ceavets with this ruleset when redirects are happening for
example? I'm also wondering if Belgian PF users have the same issue?£
I'm hopeful to get to the bottom of this as its quite annoying needing to
switch wifi channels to my ISP's router which does work with these applications.
Regards
Dries
Hi,
It is a while ago that I build ipfw firewalls, but doesn't rule 10 match all
internal (from LAN) traffic, preventing outgoing (to WAN) packets to get to the
nat rules?
I would suggest something like this:
00001 reass ip from any to any in
00050 deny log ip from any to any not antispoof in
00100 nat 1 ip4 from any to any via igc0
00300 check-state :default
00200 allow ip from any to any in table(trustedif) keep-state :default
05000 allow tcp from any to me *some open ports* in recv igc0 setup keep-state
:default
05001 allow udp from any to me *some open ports* in recv igc0 keep-state
:default
09999 deny log ip from any to any
65535 allow ip from any to any
Regards,
Ronald.
