Can't use pkg_add with ipfw

[freestate]

I enabled my firewall and set it:

firewall_type="client"

when i want to use pkg_add -r i get the following Error

Error: Unable to get ftp://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.0-release/Latest/nspluginwrapper.tbz: Can't open data connection
pkg_add: unable to fetch 'ftp://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8.0-release/Latest/nspluginwrapper.tbz' by URL

What do I have to change under ipfw to allow my system to use pkg_add command?

 

[SirDice]

You probably need to set FTP_PASSIVE_MODE. See fetch(3) (which is what pkg_add uses).