ftp not passive retrieval by squid

[Radoslaw Stachowiak]

Hello!

When squid (2.2pre) is used as ftp proxy, and browsers passes to him url of
files to retrieve (ftp://ftp.server.com/directory/somfile.tgz) is there any
possibility to specify passive/normal ftp connection?

Is it settable at runtime or only in source code?

Does squid use different program to do ftp retrieval?

The problem arise during using squid from behind a firewall.

TIA.

-- 
radoslaw.stachowiak.................................................[ALTERsc]