It's more than just 172.16.*, it is actually 172.16.0.0 to 172.31.255.255
An extract from RFC1918
<Quote>
3. Private Address Space
The Internet Assigned Numbers Authority (IANA) has reserved the
following three blocks of the IP address space for private internets:
10.0.0.0 - 10.255.255.255 (10/8 prefix)
172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
</Quote>
--
Regards,
Brian Backland
Backland Communications Inc.
Providing Premier Business Internet
705-725-7725
----- Original Message -----
From: "Josef Grosch" <[EMAIL PROTECTED]>
To: "Jack Broughton" <[EMAIL PROTECTED]>
Cc: "Oleg Chebotarev" <[EMAIL PROTECTED]>; "opensrs discuss"
<[EMAIL PROTECTED]>
Sent: Tuesday, May 14, 2002 2:18 PM
Subject: Re: SPAM?
> On Tue, May 14, 2002 at 01:22:39PM -0400, Jack Broughton wrote:
> > Isn't 192.168.* a class "B" that's not even routed over the net so you
> > shouldn't have to worry about blocking it? Same goes for 10.* (and
> > 172.16.* if memory serves me correctly). It may be that some ISPs use
> > non-routed IPs for services for their clients before their packets get out
> > on the net so be careful what you block. I know that from my cable
> > connection from home my packets get handed off through a bunch of 10.*
> > routers before they actually get out on the net.
>
> Yes, you are correct. These addresses are know as RFC1918 addresses. They
> are, by design, unroutable on public networks. A well configured firewall
> or router, if it sees a packet with a RFC1918 address, will send the packet
> to /dev/null. RFC1918 suggests that these address be used when setting up
> private networks, that is, networks on the inside of a firewall.
>
> > On the topic of spam I think I am going to block any mail coming from a .ru
> > domain. I have yet to see anything legitimate and the blackhole lists are
> > filled with .ru entries.
>
> MAPS (http://www.mail-abuse.org) offers free subscriptions to RBL for
> individuals.
>
>
> Josef
>
> --
> Josef Grosch | Another day closer to a | FreeBSD 4.5
> [EMAIL PROTECTED] | Micro$oft free world | www.bafug.org
>
>
