\_ SMTP quoth plug@arcticmail.com on 3/13/2001 13:36 as having spake thusly: \_ \_ \_ The 10/8, 172.16/12 and 192.168/16 are RFC1918 \_ "private" (non-routeable) IP addresses. This Well, see, thereby hangs a tail....providers *should* squash the non routeable addresses before sending them on. If you get this traffic on your inbound ethX card, you know someone is up to no good and your ISP is likely to suffer evil RSN. It's been a bit since I've seen a report of this, but they are there. David