Date: Tue, 24 Mar 1998 15:57:26 -0800 From: Ludwig Pummer <ludwigp@bigfoot.com> To: questions@FreeBSD.ORG Subject: off-topic: invalid IP in use Message-ID: <3.0.3.32.19980324155726.0073f150@mail.plstn1.sfba.home.com>
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I was at school, telnetted into home and ran a traceroute just out of
curiosity. I got some interesting results: there is a 172.16.4.1 computer
out there, between @Home and Netcom's network.
FreeBSD 2.2.5's traceroute
traceroute to 205.187.104.208 (205.187.104.208), 30 hops max, 40 byte packets
1 cr1-hfc1.plstn1.sfba.home.net (24.1.82.1) 15.156 ms 29.179 ms 19.742 ms
2 r1-fe2-0-0-100bt.frmt1.sfba.home.net (24.1.80.1) 8.153 ms 6.675 ms
7.549
ms
3 * * *
4 bb1-fe0-0-100bt.rdc1.sfba.home.net (24.0.0.2) 8.850 ms 12.332 ms
9.726 ms
5 172.16.4.1 (172.16.4.1) 11.799 ms 12.710 ms 9.429 ms
6 mae-west.netcom.net (198.32.136.15) 120.975 ms 483.541 ms 16.856 ms
7 h4-0-4-sjx-ca-gw1.netcom.net (163.179.233.213) 47.618 ms 307.925 ms
13.84
7 ms
8 t3-1.ple-ca-gw1.netcom.net (163.179.219.4) 81.190 ms 94.642 ms *
9 ple-ca-gw6.netcom.net (163.179.20.21) 18.132 ms 27.154 ms 29.499 ms
10 205.187.70.2 (205.187.70.2) 34.307 ms 48.218 ms 46.470 ms
11 205.187.70.4 (205.187.70.4) 52.383 ms 37.846 ms 49.410 ms
12 205.187.70.5 (205.187.70.5) 32.057 ms 44.993 ms 40.850 ms
13 205.187.114.147 (205.187.114.147) 30.415 ms 48.641 ms 46.292 ms
14 205.187.104.208 (205.187.104.208) 61.071 ms 43.405 ms 39.119 ms
DOS's tracert (from a Win95 machine going through natd on inet)
Tracing route to 205.187.104.208 over a maximum of
1 <10 ms 1 ms 1 ms inet [172.16.1.5]
2 24 ms 19 ms 19 ms cr1-hfc1.plstn1.sf
3 13 ms 10 ms 13 ms r1-fe2-0-0-100bt.f
4 * * * Request timed out.
5 13 ms 10 ms 12 ms bb1-fe0-0-100bt.rd
6 14 ms 10 ms 11 ms 172.16.4.1
7 11 ms 13 ms 15 ms mae-west.netcom.ne
8 33 ms 23 ms 23 ms h4-0-4-sjx-ca-gw1.
9 36 ms 21 ms 17 ms t3-1.ple-ca-gw1.ne
10 * * * Request timed out.
11 * * * Request timed out.
12 36 ms 26 ms 23 ms 205.187.70.4
13 25 ms 30 ms 26 ms 205.187.70.5
14 24 ms 30 ms 28 ms 205.187.114.147
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
Another test (i had to change to the IP to 205.187.70.4 since the PC was
shut off)
ping -R 205.187.70.4
PING 205.187.70.4 (205.187.70.4): 56 data bytes
64 bytes from 205.187.70.4: icmp_seq=0 ttl=246 time=194.698 ms
RR: 10.0.255.246
r2-fe0-0-100bt.rdc1.sfba.home.net (24.0.0.3)
172.16.4.2
bb.mae-w.home.net (198.32.136.70)
h0-0-mae-west.netcom.net (163.179.233.214)
h5-0.sjx-ca-gw1.netcom.net (163.179.219.6)
ple-ca-gw1.netcom.net (163.179.20.253)
205.187.70.4
205.187.70.4
Now i've got 10.0.255.246 and 172.16.4.2.
Both 172.16.4.1 and 172.16.4.2 respond to pings (times <10ms). Is @Home
doing this because they're "naughty", for security reasons, or is it some
other place that's doing this?
--Ludwig Pummer
ludwigp@bigfoot.com ICQ UIN: 692441 http://chipweb.home.ml.org
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