This is quite often used. You cant (d)DoS the routers this way, nor try to do any harm to them as you cant reach them.
Regards, Jonas On Tue, 2004-02-03 at 00:01, Brian (nanog-list) wrote: > Any ideas how (or why) the following traceroutes are leaking private > RFC1918 addresses back to me when I do a traceroute? > > Maybe try from your side of the internet and see if you get the same > types of responses. > > It's really strange to see 10/8's and 192.168/16 addresses coming from > the public internet. Has this phenomenon been documented anywhere? > Connectivity to the end-sites is fine, it's just the traceroutes that > are strange. > > (initial few hops sanitized) > > [EMAIL PROTECTED] /]# traceroute www.ibm.com > traceroute: Warning: www.ibm.com has multiple addresses; using > 129.42.17.99 > traceroute to www.ibm.com (129.42.17.99), 30 hops max, 38 byte packets > 1 (---.---.---.---) 2.481 ms 2.444 ms 2.379 ms > 2 (---.---.---.---) 17.964 ms 17.529 ms 17.632 ms > 3 so-1-2.core1.Chicago1.Level3.net (209.0.225.1) 17.891 ms 17.985 > ms 18.026 ms > 4 so-11-0.core2.chicago1.level3.net (4.68.112.194) 18.272 ms > 18.109 ms 17.795 ms > 5 so-4-1-0.bbr2.chicago1.level3.net (4.68.112.197) 17.851 ms > 17.859 ms 18.094 ms > 6 so-3-0-0.mp1.stlouis1.level3.net (64.159.0.49) 23.095 ms 22.975 > ms 22.998 ms > 7 ge-7-1.hsa2.stlouis1.level3.net (64.159.4.130) 23.106 ms 23.237 > ms 22.977 ms > 8 unknown.level3.net (63.20.48.6) 24.264 ms 24.099 ms 24.154 ms > 9 10.16.255.10 (10.16.255.10) 24.164 ms 24.108 ms 24.105 ms > 10 * * * > > > [EMAIL PROTECTED] /]# traceroute www.att.net > traceroute: Warning: www.att.net has multiple addresses; using > 204.127.166.135 > traceroute to www.att.net (204.127.166.135), 30 hops max, 38 byte > packets > 1 (---.---.---.---) 2.404 ms 2.576 ms 2.389 ms > 2 (---.---.---.---) 17.953 ms 18.170 ms 17.435 ms > 3 500.pos2-1.gw10.chi2.alter.net (63.84.96.9) 18.077 ms * 18.628 > ms > 4 0.so-6-2-0.xl1.chi2.alter.net (152.63.69.170) 18.238 ms 18.321 > ms 18.213 ms > 5 0.so-6-1-0.BR6.CHI2.ALTER.NET (152.63.64.49) 18.269 ms 18.396 > ms 18.329 ms > 6 204.255.169.146 (204.255.169.146) 19.231 ms 19.042 ms 18.982 ms > 7 tbr2-p012702.cgcil.ip.att.net (12.122.11.209) 20.530 ms 20.542 > ms 23.033 ms > 8 tbr2-cl7.sl9mo.ip.att.net (12.122.10.46) 26.904 ms 27.378 ms > 27.320 ms > 9 tbr1-cl2.sl9mo.ip.att.net (12.122.9.141) 27.194 ms 27.673 ms > 26.677 ms > 10 gbr1-p10.bgtmo.ip.att.net (12.122.4.69) 26.606 ms 28.026 ms > 26.246 ms > 11 12.122.248.250 (12.122.248.250) 27.296 ms 28.321 ms 28.997 ms > 12 192.168.254.46 (192.168.254.46) 28.522 ms 30.111 ms 27.439 ms > 13 * * * > 14 * * *
