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diff --git a/doc/rfc/rfc751.txt b/doc/rfc/rfc751.txt new file mode 100644 index 0000000..9f63a68 --- /dev/null +++ b/doc/rfc/rfc751.txt @@ -0,0 +1,295 @@ + +NWG/RFC 751 PDL 10 Dec 78 nnnnn + + + + + +Network Working Group P. David Lebling +Request for Comments: 751 (PDL@MIT-DMS) +NIC: nnnnn 10 December 1978 + + + + SURVEY OF FTP MAIL AND MLFL + + + + +Two surveys of Arpanet Server hosts were run between September 20, 1978 +and December 11, 1978. The intent was to determine the response of the +host's Server FTP program to: + +(a) An attempt to mail to an unknown recipient at that host. The +purpose of this survey was two-fold. First, to determine whether the +host accepts mail for unknown recipients at all, and second, what +response the host gives if it does not accept such mail. + +(b) An attempt to mail to a known recipient using the MLFL command +rather than the usual MAIL command. This survey was undertaken to +determine the extent of support for the MLFL command among Server hosts, +and the sort of reply received if the Server does not support MLFL. MLFL +is potentially a 'better' form of communication than mail as the message +is sent over a data connection rather than the command connection. +Using the data connection eliminates the 'end-of-mail' marker and +'command reader' problems sometimes encountered over the command +connection. + +The ground rules of the survey were that all sites listed as Servers in +the MIT/SAIL Host table were surveyed. In many cases, a host listed as +a Server would not respond to an ICP at any time during the period of +the survey. Once a host responded with what seemed to me to be a +'definitive' answer, I marked it as such and stopped surveying it. + + MLFL Survey + +The algorithm used was to ICP to socket 3 of the server (the standard +old-FTP socket). Once a 300 response was received, I sent the MLFL +command. Where I had the name of a real mailbox at a site (a +Header-person, for example) I used that, otherwise the name "**". If a +site asked for a password (response 504) after the MLFL command I gave +"USER NETML" "PASS NETML" and retried the MLFL. If the server replied +with a 255 SOCK command, I listened for the data-connection to be +established. When it was, I transferred the mail file. Interestingly +enough, most sites implement an RFC queueing algorithm that will allow +the user site to attempt to establish the data-connection from its end. + + + + [Page 1] + +NWG/RFC 751 PDL 10 Dec 78 nnnnn +Survey of FTP MAIL and MLFL + + + +Complete FTP scripts may be found, if you are interested, on MIT-DM, +file NETDOC;MLFL SURVEY. + +Sites are grouped by the general result they gave. + +-site- -last ftp reply if lost- -when- + +1) Sites that lost for various reasons: + +BNL 530 NOT LOGGED IN. after MLFL +HARV-10 431 INVALID ENTRY - Try again after USER +LLL-MFE 454 Login please after SOCK +LONDON 000 INDRA FTP Version 2.00 ... after ICP +NBS-10 454 Login please after SOCK +WHARTON 454 DATA Connection error ... after SOCK +WPAFB-AFAL 454 Login please after SOCK + +Note: "when" describes the last action performed by the surveyer before +the indicated anomalous response. + + after ICP -- surveyer had done ICP to socket 3 + after MLFL -- surveyer had sent MLFL command + after USER -- surveyer had sent USER NETML in response to + "504 Login please" + after SOCK -- surveyer had attempted to connect to specified + data socket + +2) Sites that don't support MLFL and say so: + +AFWL 501 ML<?>FL ** +CCA-SPEECH 501 ML<?>FL ** +EGLIN 501 ML<?>FL ** +LBL 506 Command not implemented. +LONDON-VDH 500 Command unrecognized +UCLA-CCN 500 COMMAND UNRECOGNIZED +WPAFB 501 ML<?>FL ** + +3) Sites that support MLFL (or at least go through all the right +motions): + +AMES-67 MIT-AI SRI-KL +BBN-TENEX MIT-DMS SU-AI +BBN-TENEXA MIT-MC SUMEX-AIM +BBN-TENEXD MIT-ML UCLA-ATS +BBN-TENEXE MIT-XX UCLA-SECURITY +BBN-UNIX NBS-UNIX USC-ECL +CCA-TENEX OFFICE-1 USC-ISI +CMU-10A PARC-MAXC USC-ISIB +CMU-10B PARC-MAXC2 USC-ISIC + + + + [Page 2] + +NWG/RFC 751 PDL 10 Dec 78 nnnnn +Survey of FTP MAIL and MLFL + + + +DEC-MARLBORO RADC-TOPS20 USC-ISIE +I4-TENEX RAND-RCC UTEXAS +ILL-UNIX RAND-UNIX +LL RUTGERS +LL-ASG SRI-KA + +4) Sites that support MLFL but require "USER NETML" "PASS NETML" +(Multics): + +MIT-MULTICS +RADC-MULTICS + +5) Others: + +a) Sites that might support it if I could mail to a real user (some of +these run operating systems that are "known to work", e.g. TENEX): + +BBN-TENEXB 450 No such mailbox at this site. +CCA-SDMS 450 User Unknown +CCTC 451 User Not Recognized +CMU-10D 507 USER NOT FOUND: ** +DTI 451 User Not Recognized +LL-11 450 User Unknown +LL-XN 450 User Unknown +NCSC 451 User Not Recognized +NOSC-CC 451 User Not Recognized +NOSC-SDL 451 User Not Recognized +NTIA-ITS 451 User Not Recognized +OFFICE-2 450 No such mailbox at this site. +RADC-XPER 451 User Not Recognized +SDAC-44 431 User name invalid +SDAC-UNIX 451 User Not Recognized +SRI-UNIX 451 User Not Recognized + +b) Sites that either never responded to an ICP to socket 3, or were not +accepting FTP users: + +ANL I4B-TENEX NOSC-SECURE1 +ARPA-DMS ISI-SPEECH11 NSWC-WO +CMU-CMMP LBL-UNIX NUSC +CTO-DDS LLL-COMP NUSC-NPT +DTNSRDC MOFFET-ARC NWC +FNWC NADC NYU +GUNTER-UNIX NDRE PENT-UNIX + + + + + + + + + [Page 3] + +NWG/RFC 751 PDL 10 Dec 78 nnnnn +Survey of FTP MAIL and MLFL + + + + MAIL Survey + +The mechanics of the MAIL survey were similar to those of the MLFL +survey. The command was "MAIL Fzorkness" (an account unlikely to exist +on any host). The responses are grouped into a few general categories. + +Complete FTP results may be found on MIT-DM, file NETDOC;MAIL SURVEY. + +-site- -last response- + +1) Sites that lost completely. + +LONDON 000 INDRA FTP Version <>.00 ... + +2) Sites that accept mail to an unknown recipient. + +BNL MIT-ML USC-ISI +MIT-AI RAND-RCC USC-ISIB +MIT-DMS UCLA-CCN USC-ISIC +MIT-MC USC-ECL USC-ISIE + +3) Sites that refuse mail to an unknown recipient (grouped by response). + +SDAC-44 431 User name invalid + +BBN-TENEX 450 No such mailbox at this site. +BBN-TENEXA 450 No such mailbox at this site. +BBN-TENEXB 450 No such mailbox at this site. +BBN-TENEXD 450 No such mailbox at this site. +BBN-TENEXE 450 No such mailbox at this site. +BBN-UNIX 450 User Unknown +CCA-SDMS 450 User Unknown +CCTC 451 User Unknown +EDN-UNIX 450 User Unknown +I4-TENEX 450 No such mailbox at this site. +ILL-UNIX 450 User unknown +LL 450 No such mailbox at LL +LL-ASG 450 User unknown +LL-XN 450 User unknown +MIT-MULTICS 450 Cannot locate mailbox for \Fzorkness\ +MIT-XX 450 No such mailbox at this site. +NBS-UNIX 450 User Unknown +NCSC 450 User Unknown +NOSC-CC 450 User Unknown +NOSC-SDL 450 User Unknown +NTIA-ITS 450 User Unknown +OFFICE-1 450 No such mailbox at this site. +OFFICE-2 450 No such mailbox at this site. +PARC-MAXC 450 No such mailbox at this site. + + + + [Page 4] + +NWG/RFC 751 PDL 10 Dec 78 nnnnn +Survey of FTP MAIL and MLFL + + + +PARC-MAXC2 450 No such mailbox at this site. +RADC-XPER 450 User Unknown +RADC-MULTICS 450 Cannot locate mailbox for \Fzorkness\ +RADC-TOPS20 450 No such mailbox at this site. +RAND-UNIX 450 User Unknown +RUTGERS 450 No such mailbox at this site. +SDAC-UNIX 450 User Unknown +SRI-KA 450 No such mailbox at this site. +SRI-KL 450 No such mailbox at this site. +SU-AI 450 I don't know anybody named Fzorkness +SUMEX-AIM 450 No such mailbox at this site. +UCLA-ATS 450 User Unknown +UCLA-SECURITY 450 User Unknown +UTEXAS 450 User Unknown + +CCA-TENEX 451 No such mailbox at this site. + +AFWL 501 MA<?>IL Fzorkness +CCA-SPEECH 501 MA<?>IL Fzorkness +EGLIN 501 MA<?>IL Fzorkness +WPAFB 501 MA<?>IL Fzorkness + +AMES-67 503 COMMAND \MAIL FZORKNESS\ IGNORED: UNKNOWN USER + +LBL 506 Command not implemented. + +CMU-10A 507 % USER NOT FOUND: FZORKNESS +CMU-10B 507 % USER NOT FOUND: FZORKNESS +CMU-10D 507 % USER NOT FOUND: FZORKNESS +HARV-10 507 No such user as FZORKNESS +LLL-MFE 507 No such user as FZORKNESS +NBS-10 507 No such user as FZORKNESS +WHARTON 507 No such user as FZORKN +WPAFB-AFAL 507 No such user as FZORKNESS + +4) Sites to which I was never able to connect, or which were not +accepting users. + +ANL I4B-TENEX NOSC-SECURE1 +ARPA-DMS ISI-SPEECH11 NSWC-WO +CMU-CMMP LBL-UNIX NUSC +CTO-DDS LL-11 NUSC-NPT +DEC-MARLBORO LLL-COMP NWC +DTI LONDON-VDH NYU +DTNSRDC MOFFETT-ARC SRI-UNIX +FNWC NADC SU-ISL +GUNTER-UNIX NDRE + + + + + + [Page 5]
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