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- [ netinfo/hostserver-instructions.txt ]
-
- The NIC Internet Hostname Server is a TCP-based host information
- program and protocol running on the NIC.DDN.MIL machine. The
- function of this particular server is to deliver machine-readable
- name/address information describing the networks, gateways, hosts, and
- domains within the internet environment. Basic use of the NIC
- Hostname Server is documented in RFC 953, which is available via FTP
- from NIC.DDN.MIL as the file RFC:RFC953.TXT.
-
- To access this server from a program, establish a TCP connection to
- port 101 (decimal) at the service host, NIC.DDN.MIL (192.67.67.20).
- Send the information request (a single line), and read the resulting
- response. The connection is closed by the server upon completion of
- the response, so only one request can be made for each connection.
-
- For example:
-
- From Remote Host: telnet NIC.DDN.MIL 101<Return>
- haddr 192.67.67.20<Return>
-
- SRI-NIC response:
- HOST : 192.67.67.20 : NIC.DDN.MIL : DEC-2060 : TCP/TELNET,
- TCP/SMTP, TCP/TIME, TCP/FTP, TCP/ECHO, ICMP, UDP/TIME, UDP/DOMAIN,
- TCP/FINGER:
-
- Connection closed by foreign host
-
- The currently supported keywords are:
-
- Keyword Response
- ------- --------
- HELP This info
- VERSION "VERSION: <string>" where <string> will be different
- for each version of the host table.
- HNAME <hostname> One or more matching host table entries.
- HADDR <hostaddr> One or more matching host table entries.
- ALL The entire host table.
- ALL-Z The entire host table in Unix COMPRESS format.
- ALL-MIL A host table of MILNET sites only.
-
- DOMAINS The entire top-level domain table (domains only).
- ALL-DOM Both the entire domain table and the host table.
-
- ALL-NETS Just the NETWORK section of the host table.
-
- The server accepts only a single command line and returns only a
- single response before closing the connection. HNAME and HADDR are
- useful for looking up a specific host by name or address; VERSION can
- be used by automated processes to see whether a "new" version of the
- host table exists without having to transfer the whole table. Note,
- however, that the returned version string is only guaranteed to be
- unique to each version, and nothing should currently be assumed about
- its format.
-
- PLEASE NOTE: the Official DoD Internet Host Table is updated twice a
- week. HNAME or HADDR may return information that is not yet
- incorporated into the latest host table. Use VERSION number instead
- to verify whether you have the latest host table information.
-
- Problems, complaints, or suggestions should be sent via electronic
- mail to HOSTMASTER@NIC.DDN.MIL.
-
-