ipfw and ftpd

Tomasz CEDRO tomek at cedro.info
Fri Sep 3 18:25:02 UTC 2021

On Fri, Sep 3, 2021 at 7:05 PM Christoph Harder  wrote:
> I'm using "FreeBSD 12.2-RELEASE-p7 GENERIC amd64" and ipfw.
> Currently I'm trying to get ftpd working for the local network, but when ipfw is enabled it's not working.
> It works without any problems when ipfw is not running. The client is a FileZilla Cleint on a windows machine in localnetwork0.
> My ipfw.rules file looks like below. I've removed the pass rules for other services, but I didn't delete any of the deny rules.

Have you tried this generic approach using /etc/rc.conf ?

firewall_myservices="20/tcp 21/tcp"

Take a look at /etc/rc.firewall source code, comments will explain
everything, there is a 'firewall_logdeny' that enables logging dropped
packets :-)

        # Configuration:
        #  firewall_myservices:         List of ports/protocols on which this
        #                                host offers services.
        #  firewall_allowservices:      List of IPv4 and/or IPv6 addresses
        #                                that have access to
        #                                $firewall_myservices.
        #  firewall_trusted:            List of IPv4 and/or IPv6 addresses
        #                                that have full access to this host.
        #                                Be very careful when setting this.
        #                                This option can seriously degrade
        #                                the level of protection provided by
        #                                the firewall.
        #  firewall_logdeny:            Boolean (YES/NO) specifying if the
        #                                default denied packets should be
        #                                logged (in /var/log/security).
        #  firewall_nologports:         List of TCP/UDP ports for which
        #                                denied incoming packets are not
        #                                logged.

CeDeROM, SQ7MHZ, http://www.tomek.cedro.info

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