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- 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
-
-
-
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-
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-
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- [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
-
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-
- [Page 5]