[Comm] apt-get через фаервол - ?

[Jury Levykin <altcomm@list.ru>]

Фрагмент правил iptables:

 ...
    # ---------------
    # FTP client (21)
    # ---------------

    # outgoing request
    iptables -A OUTPUT -o $EXTERNAL_INTERFACE -p tcp  \
             -s $IPADDR --source-port $UNPRIVPORTS \
             --destination-port 21 -j ACCEPT

    iptables -A INPUT  -i $EXTERNAL_INTERFACE -p tcp ! --syn \
             --source-port 21 \
             -d $IPADDR --destination-port $UNPRIVPORTS -j ACCEPT


    # PORT mode data channel
    iptables -A INPUT  -i $EXTERNAL_INTERFACE -p tcp  \
             --source-port 20 \
             -d $IPADDR --destination-port $UNPRIVPORTS -j ACCEPT

    iptables -A OUTPUT -o $EXTERNAL_INTERFACE -p tcp ! --syn \
             -s $IPADDR --source-port $UNPRIVPORTS \
             --destination-port 20 -j ACCEPT


    # ESTABLISHED and RELATED
    iptables -A INPUT  -p tcp -i $EXTERNAL_INTERFACE -d $IPADDR \
             -m state --state ESTABLISHED,RELATED -j ACCEPT

    iptables -A OUTPUT -p tcp -o $EXTERNAL_INTERFACE -s $IPADDR \
             -m state --state ESTABLISHED,RELATED -j ACCEPT

 ...


На мой взгляд, открыто все для работы ftp, но
после выполнения apt-get update получаю следующее:

# apt-get update
Get:1 ftp://updates.altlinux.com Master/2.2/i586 release [696B]
Err ftp://updates.altlinux.com Master/2.2/i586 release
  Could not connect passive socket.
Failed to fetch ftp://updates.altlinux.com/Master/2.2/i586/base/release  Could not connect passive socket.
Reading Package Lists... Done
Collecting File Provides... Done
W: Release files for some repositories could not be retrieved or authenticated. Such repositories are being ignored.
W: You may want to run apt-get update to correct these problems
E: Some index files failed to download, they have been ignored, or old ones used instead.


Что нужно подправить для нормальной работы apt ?