mc vs firewall

[pecko]

hello!

i have set my firewall as:
INPUT --protocol tcp -s 0/0 --source-port 20 -j ACCEPT
INPUT --protocol tcp -s 0/0 --source-port 21 -j ACCEPT

when i'm using simple ftp everything goes well. but when i'm using mc 
it's impossible to get directory listing due to using port different to 
20 with mc. is there any possibility to force mc to use standard port 
20?

thx 4 ur help

-- 
Peter J. (http://www.pecko.sk)
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