IPchains

[root]

Hello, I have been having quite a bit of hacking problems, and I'm in
the need of configuring IPchains to protect my system from incoming
attacks, but it seems like no matter how I set it up, it is either too
weak (ie only covering telnet, ftp, and www ports) or it is too strong,
and won't let me access the internet.  I was wondering if anybody would
be able to tell me what ports I need to keep open for things such as
DHCP, ICQ etc, without leaving everything out in the open.  Thanks in
advance for any help you can provide.

John Wainright