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Network Working Group R. Clements Request for Comments: 844 February 1983 Who Talks ICMP, too? Survey of 18 February 1983 A survey was undertaken to determine how many hosts are able to respond to TELNET connections from a user at a class C site. This requires, in addition to IP and TCP, participation in gateway routing via ICMP and handling of class C addresses. The list of hosts was taken from RFC843, extracting only those hosts which are listed there as accepting TELNET connections. The tests were run on 18-Feb-83 from 3 PM to 6:30 PM EST from a terminal concentrator located at, at BBN. This net (192.1.2.xxx) is connected to the internet through a routing gateway, and this terminal concentrator speaks ICMP including redirection and reporting to the user. The connection attempts were done manually by typing the dotted form addresses, so only three passes were made through the table of hosts. Therefore a few may have been missed due to being down at these times. Summary information: Type # OK out of % OK ---- ---- ------ ---- On net 10 77 121 63.6% other class A 20 34 58.8% non-class A 30 32 93.8% Total 127 187 67.9% Page 1 Results in host table order: Name Address Result ---- ------- ------ ll no response compion-vms no response ames-tss refused mitre OK radc-multics OK nbs-vms no response usc-eclb OK nadc OK seismo OK usc-isid OK brl no response nosc-cc OK cca-unix OK parc-maxc OK purdue OK utah-cs host unreachable wpafb no response afwl no response bbn-tenexb OK bbnf OK ada-vax no response afsc-ad no response cit-20 OK sumex-aim OK nyu no response mit-multics OK utexas-11 OK usgs1-multics OK usgs2-multics OK usgs3-multics OK sri-nic OK ucb-arpa no response nrl no response hi-multics OK dtnsrdc OK bbnt OK nswc-dl OK sandia OK nlm-mcs OK lanl-unix OK washington OK Page 2 ucla-ccn OK ll-vlsi OK compion no response gunter-adam OK cmu-cs-a OK nbs-sdc no response sri-kl OK lll-mfe OK usc-isi OK usc-eclc OK apg-1 OK cca-vms refused lbl-csam no response wpafb-afwal no response bbng OK usc-isie OK cit-vax no response anl-mcs no response mit-dms OK utexas-20 OK martin-b OK rand-relay OK bbn-unix OK mit-devmultics host unreachable dec-marlboro OK nrl-aic OK nalcon no response bbn-vax OK nswc-g no response office-10 no response csnet-sh OK srijoyce no response ucla-security OK sri-csl OK isi-vaxa OK office-3 no response sri-unix no response usc-isif OK afsc-dev no response aids-unix host unreachable rutgers OK mit-ai OK aerospace OK sri-ai OK ucb-vax no response nswc-wo no response Page 3 ucla-ats OK su-score OK cmu-cs-c OK radc-tops20 OK sri-tsc no response edn-unix OK usc-ecl OK brl-bmd no response nprdc OK kestrel no response utah-20 OK office-7 no response mit-mc OK okc-unix host unreachable bbn-tenexc OK bbna OK sri-prmh no response usc-isib OK jpl-vax no response mit-ml OK rand-unix OK sri-iu no response mcclellan no response nsrdcoa no response bbns host unreachable nwc-387b OK uw-vlsi OK s1-c OK ll-en no response dca-ems OK bbn-clxx OK bbn-rsm no response bbn-noc2 OK nrl-css OK ucl-cs OK ucl-ucl2 OK cmu-cs-ius OK cmu-cs-vlsi OK cmu-cs-zog OK cmu-cs-g OK cmu-cs-cad OK cmu-ri-fas OK cmu-cs-spice OK cmu-cs-gandalf OK cmu-ri-isl OK cmu-cs-speech OK cmu-cs-unh no response cmu-ri-arm OK cmu-ri-isl2 OK cmu-cs-pt OK Page 4 dcn1 OK dcn2 OK dcn3 OK dcn5 OK dcn6 OK ford1 OK ford3 OK ford4 OK ford-lab OK ford-ecc OK ford-ers OK ford-eed OK ford-wdl1 no response ford-wdl6 OK umd1 OK umd3 OK umd5 OK mit-csr no response mit-ajax no response mit-cls no response csnet-sh OK edn-host1 host unreachable bbncca OK bbnccf OK bbnx OK csnet-cic OK bbn-noc OK bbnccb OK bbn-admin OK bbnz OK bbnccc OK bbnp OK bbn-inoc OK bbnq OK bbny OK bbnccd OK bbncci OK bbnw OK bbn-cd OK ucbarpa no response ucbcad no response ucbernie no response ucbmonet no response ucbesvax no response ucbvax no response ucbkim no response ucbcalder no response ucbmatisse no response ucbingres no response ndre1 OK -- end -- Page 5