[ale] Cablemodem shows in my traceroutes?

[Robert L. Harris]

I'm trying to debug some IPv6 and just ran a traceroute from behind my
firewall:

{0}:/usr/src/kernel>traceroute www.kame.net
traceroute to apple.kame.net (203.178.141.220), 30 hops max, 38 byte
packets
 1  wally (192.168.0.1)  0.249 ms  0.154 ms  0.130 ms
 2  cablemodem (10.2.0.1)  31.877 ms  9.824 ms  66.160 ms
 3  209.186.118.17 (209.186.118.17)  11.221 ms  11.911 ms  9.951 ms
 4  172.26.96.2 (172.26.96.2)  13.143 ms  9.803 ms  15.492 ms
 5  65.90.64.5 (65.90.64.5)  13.588 ms  12.239 ms  12.465 ms
 6  P5-0.c0.atln.broadwing.net (216.140.12.41)  12.650 ms  12.825 ms 12.056 ms
 7  p3-0.c0.wash.broadwing.net (216.140.8.109)  22.946 ms  24.353 ms 23.576 ms
.
.
.


umm, this is odd as the external interface of my firewall (wally) has a
valid IP (24.216.225.11)...  

>From my firewall:

raceroute to apple.kame.net (203.178.141.220), 30 hops max, 38 byte
packets
 1  cablemodem (10.2.0.1)  77.861 ms  20.864 ms  8.453 ms
 2  209.186.118.17 (209.186.118.17)  24.057 ms  39.684 ms  9.449 ms
 3  172.26.96.2 (172.26.96.2)  12.061 ms  10.679 ms  10.443 ms
 4  65.90.64.5 (65.90.64.5)  19.208 ms  11.687 ms  12.402 ms
 5  P5-0.c0.atln.broadwing.net (216.140.12.41)  19.451 ms  12.975 ms 16.829 ms
 6  p3-0.c0.wash.broadwing.net (216.140.8.109)  27.234 ms  29.734 ms 23.076 ms

Anyone else see this?  Is it normal?  I thought the cable modems acted
like a transparent bridge and wouldn't show in traceroutes, etc...

Robert






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Robert L. Harris                     | PGP Key ID: E344DA3B
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