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" <jgrosch@mooseriver.com> To: "Jack Broughton" <jack@ctsolutions.com> Cc: "Oleg Chebotarev" <chebotarev@yahoo.com>; "opensrs discuss" <discuss-list@opensrs.org> 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 > jgrosch@MooseRiver.com | Micro$oft free world | www.bafug.org > >
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