inbound port 20

[Kaptain <kaptain () kaptain com>]

Hi all.  We are having a live update issue with Symantec because our
firewall blocks inbound port 20 and that is the response port that opens
to receive their file via ftp.  We are considering opening the port
permenantly or semi-permenantly to alleviate the problem.  Can anyone
point to any security issues that might be associated with this and/or any
precautions we should take if we open the port?  Thanks in advance for any
advice.

-AK