routing - Telling a story with traceroute: how does it work? -


if traceroute on bad.horse amazing result:

⚘ traceroute bad.horse                                                                                                                                                                                                                                                               10:46:24 traceroute bad.horse (162.252.205.157), 30 hops max, 60 byte packets  1  gateway (192.168.42.1)  0.382 ms  0.690 ms  0.795 ms  2  10.52.192.1 (10.52.192.1)  8.594 ms  13.533 ms  14.438 ms  3  70.183.68.108 (70.183.68.108)  14.525 ms  14.620 ms  14.643 ms  4  70.183.71.92 (70.183.71.92)  23.323 ms  24.356 ms  24.219 ms  5  dalsbprj01-ae1.0.rd.dl.cox.net (68.1.2.109)  119.445 ms  120.277 ms  62.337 ms  6  10ge6-9.core1.dal1.he.net (184.105.16.77)  70.903 ms  57.131 ms  67.526 ms  7  10ge12-6.core1.chi1.he.net (184.105.213.118)  43.732 ms  42.770 ms  43.774 ms  8  100ge10-1.core1.msp1.he.net (184.105.223.178)  59.138 ms  60.040 ms  60.115 ms  9  ip-house.gigabitethernet3-6.core1.msp1.he.net (216.66.78.110)  55.395 ms  54.378 ms  55.345 ms 10  c4500-1.mpls.iphouse.net (216.250.189.170)  55.412 ms  48.480 ms  53.559 ms 11  egw-iphouse.mplsc1.mn.us.sn11.net (209.240.64.149)  52.298 ms  53.225 ms  53.372 ms 12  sandwichnet.dmarc.lga1.atlanticmetro.net (208.68.168.214)  84.848 ms  83.666 ms  84.504 ms 13  bad.horse (162.252.205.130)  84.768 ms  85.393 ms  87.570 ms 14  bad.horse (162.252.205.131)  86.527 ms  90.848 ms  83.121 ms 15  bad.horse (162.252.205.132)  91.399 ms  91.158 ms  91.256 ms 16  bad.horse (162.252.205.133)  97.087 ms  96.865 ms  96.914 ms 17  he.rides.across.the.nation (162.252.205.134)  104.836 ms  104.955 ms  104.670 ms 18  the.thoroughbred.of.sin (162.252.205.135)  108.286 ms  107.884 ms  107.020 ms 19  he.got.the.application (162.252.205.136)  109.024 ms  110.304 ms  111.553 ms 20  that.you.just.sent.in (162.252.205.137)  117.034 ms  113.230 ms  115.878 ms 21  it.needs.evaluation (162.252.205.138)  123.398 ms  122.680 ms  120.805 ms 22  so.let.the.games.begin (162.252.205.139)  129.908 ms  126.529 ms  130.947 ms 23  a.heinous.crime (162.252.205.140)  131.899 ms  132.798 ms  131.009 ms 24  a.show.of.force (162.252.205.141)  136.237 ms  136.104 ms  135.543 ms 25  a.murder.would.be.nice.of.course (162.252.205.142)  140.381 ms  141.924 ms  142.517 ms 26  bad.horse (162.252.205.143)  145.723 ms  142.737 ms  148.146 ms 27  bad.horse (162.252.205.144)  152.364 ms  152.251 ms  150.875 ms 28  bad.horse (162.252.205.145)  155.535 ms  155.014 ms  152.655 ms 29  he-s.bad (162.252.205.146)  163.286 ms  161.130 ms  163.883 ms 30  the.evil.league.of.evil (162.252.205.147)  165.159 ms  167.220 ms  164.500 ms 31  is.watching.so.beware (162.252.205.148)  170.873 ms  173.487 ms  171.568 ms 32  the.grade.that.you.receive (162.252.205.149)  176.218 ms  175.204 ms  174.433 ms 33  will.be.your.last.we.swear (162.252.205.150)  182.528 ms  184.565 ms  182.459 ms 34  so.make.the.bad.horse.gleeful (162.252.205.151)  182.353 ms  187.004 ms  188.215 ms 35  or.he-ll.make.you.his.mare (162.252.205.152)  193.428 ms  190.271 ms  192.049 ms 36  o_o (162.252.205.153)  196.362 ms  196.326 ms  196.022 ms 37  you-re.saddled.up (162.252.205.154)  201.828 ms  201.184 ms  201.339 ms 38  there-s.no.recourse (162.252.205.155)  205.054 ms  207.239 ms  205.630 ms 39  it-s.hi-ho.silver (162.252.205.156)  212.140 ms  211.960 ms  212.158 ms 40  signed.bad.horse (162.252.205.157)  211.620 ms  209.723 ms  212.074 ms

how work? how setup network in such way traceroute give result this?

eheheh nice!

it's because author of joke owns 162.252.204.0/22 (sandwich.net llc or 1 of customers maybe), consequently have dns server (162.252.205.157) authoritative replies ptr queries inside range.

now, need assign routers many ips number of sentences want show (or assign ips virtual instances inside same physical router, or make policy routing between svis, etc.).

then, need define entry point (router) bad.horse host (162.252.205.157) in autonomous system as62512 (that is, advertise 162.252.205.157 bgp first router in path).

from entry point, need make route on every other router point next router till bad.horse (ie. define path of routers packet entering network destination ip of bad.horse follow); in other words like:

[internet]-->router0 (ip x.x.x.1)-->router1 (ip x.x.x.2)-->router3 (ip x.x.x.3)-->[bad.horse host]

finally, in dns server, map ips in path string, sentence got. example above:

x.x.x.1 -> hello.you

x.x.x.2 -> how.are.you

x.x.x.3 -> etc...

this way, when traceroute software receive time exceed every router in path (in sequence), try resolve ip name reaching dns server, receiving sentences (in form of dns names) configured.


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