[sf-perl] port/protocol list for firewalls?

David Alban extasia at extasia.org
Tue Nov 28 09:16:03 PST 2006

I deny everything inbound that's not ESTABLISHED or RELATED.  And I
started out by allowing only a tiny set of outbound ports. Over time,
when I came across something I needed to work but didn't, I then
temporarily expanded the set of open outbond ports.  Permanently, if
it was important or made sense to do so.

But I don't know your context, so I don't know if this is useful information.

P.S.  You've checked out RFC 1700, right?

On 11/28/06, Rich Morin <rdm at cfcl.com> wrote:
> Can someone supply a link to a definitive list of the ports
> and protocols that need to be forwarded for assorted services?
> I know about the Wikipedia page
>   http://en.wikipedia.org/wiki/Port_number
> and the IANA list
>   http://www.iana.org/assignments/port-numbers
> Unfortunately, they disagree in spots, so it's not clear to
> me which ports/protocols I need to forward in my router.  For
> example, I currently have {20,21}/{tcp,udp} open for FTP, but
> I dunno if this is necessary...

Live in a world of your own, but always welcome visitors.

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