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On Thu, Mar 04, 2004 at 09:24:40PM -0500, David Edwards wrote:
> Hello folks.. I have a quick question ipfw in a 4.8 server..
>=20
> In /etc/rc.conf, if you set this - firewall_type=3D"OPEN", is it also
> necessary for this options IPFIREWALL_DEFAULT_TO_ACCEPT in the kernel con=
fig
> file?
No, firewall_type=3D"open" will work even without the default-to-accept
kernel config option.
The presence or absence of the kernel configuration option determines
what rule 65535 will be at startup: at the initialization of the ipfw
framework, it places a rule numbered 65535, which is either 'allow' if
the option is present, or 'deny' if it is not. The firewall_type=3D"open"
rc.conf knob determines the behavior of the /etc/rc.firewall script
(which can be overridden by setting firewall_script=3D"something else" in
/etc/rc.conf) - and rc.firewall's 'open' mode creates a rule numbered
65000. Since ipfw terminates the rule search on the first match, rule
65000 will be processed before rule 65535, and the kernel's default will
never be considered - firewall_type=3D"open" trumps the presence or
absence of the IPFIREWALL_DEFAULT_TO_ACCEPT option.
G'luck,
Peter
--=20
Peter Pentchev roam@ringlet.net roam@sbnd.net roam@FreeBSD.org
PGP key: http://people.FreeBSD.org/~roam/roam.key.asc
Key fingerprint FDBA FD79 C26F 3C51 C95E DF9E ED18 B68D 1619 4553
If this sentence were in Chinese, it would say something else.
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