TOMIII@MTUS5.BITNET (Thomas Dwyer III) (09/10/90)
Does anyone know how to obtain the hostname of a machine given the IP address using a name server (the nslookup feature of unix?) ? Thanks, Thomas Dwyer III Email: tomiii@mtu.edu Network Programmer tomiii@mtus5.BITNET Computing Technology Services Voice: (906) 487-2110 Michigan Technological University Fax: (906) 487-2787
aaron@ux.acs.umn.edu (Aaron Y.T. Cheung) (09/10/90)
| Does anyone know how to obtain the hostname of a machine given the IP | address using a name server (the nslookup feature of unix?) ? Try the reverse mapping -- nslookup with the PTR type: Eg, to get the hostname of IP address 128.101.63.2, nslookup> set q=ptr nslookup> 2.63.101.128.in-addr.arpa. (note that the IP is supplied reversed) for the convenience of querying multiple IP's, nslookup> set q=ptr nslookup> set do=in-addr.arpa. nslookup> 2.63.101.128 nslookup> 1.63.101.128 etc. Works only if the IP address is connected to the Internet and someone did register his corresponding network.in-addr.arpa domain with Nic and someone actually put in the ptr records for their hosts and their primary and secondary nameservers are not down and.... :-) Hope it helps. /aaron.
mathisen@dali.cs.montana.edu (Jaye Mathisen) (09/10/90)
In article <90252.231430TOMIII@MTUS5.BITNET> TOMIII@MTUS5.BITNET (Thomas Dwyer III) writes: >Does anyone know how to obtain the hostname of a machine given the IP >address using a name server (the nslookup feature of unix?) ? To find the hostname for IP address 1.2.3.4: % nslookup > set type=ptr > 4.3.2.1.in-addr.arpa will do the trick... Assuming the .in-addr.arpa tables have been set up appropriately...
thomas@uplog.se (Thomas Tornblom) (09/10/90)
In article <90252.231430TOMIII@MTUS5.BITNET> TOMIII@MTUS5.BITNET (Thomas Dwyer III) writes:
Does anyone know how to obtain the hostname of a machine given the IP
address using a name server (the nslookup feature of unix?) ?
nslookup -query=ptr <ip-address reversed>.in-addr-arpa.
I.e:
For the host 192.16.142.80 the query would be:
nslookup -query=ptr 80.142.16.192..in-addr-arpa.
--
Real life: Thomas Tornblom Email: thomas@uplog.se
Snail mail: Telesoft Uppsala AB Phone: +46 18 189406
Box 1218 Fax: +46 18 132039
S - 751 42 Uppsala, Swedenthomas@uplog.se (Thomas Tornblom) (09/10/90)
In article <THOMAS.90Sep10110602@uplog.uplog.se> thomas@uplog.se (Thomas Tornblom) writes:
For the host 192.16.142.80 the query would be:
nslookup -query=ptr 80.142.16.192..in-addr-arpa.
Sloppy fingers, it should of course be:
nslookup -query=ptr 80.142.16.192.in-addr.arpa.
--
Real life: Thomas Tornblom Email: thomas@uplog.se
Snail mail: Telesoft Uppsala AB Phone: +46 18 189406
Box 1218 Fax: +46 18 132039
S - 751 42 Uppsala, Sweden
--
Real life: Thomas Tornblom Email: thomas@uplog.se
Snail mail: Telesoft Uppsala AB Phone: +46 18 189406
Box 1218 Fax: +46 18 132039
S - 751 42 Uppsala, Swedenkarl_kleinpaste@cis.ohio-state.edu (09/10/90)
tomiii@mtus5.bitnet writes: Does anyone know how to obtain the hostname of a machine given the IP address using a name server (the nslookup feature of unix?) ? host(1) is better for 99+% of the usual queries you want to make, including automatic in-addr.arpa queries when given a dotted quad, no need to do special "query=ptr" things. | [78] [10:41am] giza:/n/giza/0/karl> host 128.146.8.60 | Name: tut.cis.ohio-state.edu | Address: 128.146.8.60 | Aliases: | | [79] [10:42am] giza:/n/giza/0/karl> host 128.146.0.0 | Name: net.ohio-state.edu | Address: 128.146.0.0 | Aliases: | | [80] [10:42am] giza:/n/giza/0/karl> host -a tut.cis.ohio-state.edu. | tut.cis.ohio-state.edu 1395 IN A 128.146.8.60 | tut.cis.ohio-state.edu 86400 IN HINFO pyramid-98x unix | tut.cis.ohio-state.edu 86400 IN MX 100 tut.cis.ohio-state.edu | tut.cis.ohio-state.edu 86400 IN WKS 128.146.8.60 udp 42 tftp sunrpc | tut.cis.ohio-state.edu 86400 IN WKS 128.146.8.60 tcp ftp telnet smtp nameserver sunrpc | Additional information: | tut.cis.ohio-state.edu 1395 IN A 128.146.8.60 You can pick it up as tut.cis.ohio-state.edu:pub/nameserver/host.[1c]. Chuck Hedrick/Rutgers is responsible for it. --karl
paul@uxc.cso.uiuc.edu (Paul Pomes - UofIllinois CSO) (09/11/90)
Thomas Dwyer III <TOMIII@MTUS5.BITNET> writes: >Does anyone know how to obtain the hostname of a machine given the IP >address using a name server (the nslookup feature of unix?) ? > >Thanks, >Thomas Dwyer III Email: tomiii@mtu.edu >Network Programmer tomiii@mtus5.BITNET >Computing Technology Services Voice: (906) 487-2110 >Michigan Technological University Fax: (906) 487-2787 Try these csh aliases (courtesy of Matt Crawford): # BIND aliases alias a "(" echo set q=A ";" echo \!\* ")" "|" nslookup alias cname "(" echo set q=CNAME ";" echo \!\* ")" "|" nslookup alias mx "(" echo set q=MX ";" echo \!\* ")" "|" nslookup alias hinfo "(" echo set q=HINFO ";" echo \!\* ")" "|" nslookup alias ns "(" echo set q=NS ";" echo \!\* ")" "|" nslookup alias any "(" echo set q=ANY ";" echo \!\* ")" "|" nslookup alias soa "(" echo set q=SOA ";" echo \!\* ")" "|" nslookup alias ptr echo \!$ \| awk -F. \'\{printf \"set q=PTR\\n%s.%s.%s.%s.in-addr.arpa\\n\",\$4,\$3,\$2,\$1\}\' \| nslookup or these ksh functions: # BIND functions function a # Addresses { nslookup <<- EOF set q=A $1 EOF } function cname # Canonical name { nslookup <<- EOF set q=CNAME $1 EOF } function mx # Mail eXchangers { nslookup <<- EOF set q=MX $1 EOF } function hinfo # Host information { nslookup <<- EOF set q=HINFO $1 EOF } function ns # Name servers { nslookup <<- EOF set q=NS $1 EOF } function any # Any query { nslookup <<- EOF set q=ANY $1 EOF } function soa # Start of authority { nslookup <<- EOF set q=SOA $1 EOF } function ptr # Inverse query { print $1 | awk -F. '{printf "set q=PTR\n%s.%s.%s.%s.in-addr.arpa\n",$4,$3,$2,$1}' | nslookup } -- Paul Pomes UUCP: {att,iuvax,uunet}!uiucuxc!paul Internet, BITNET: paul@uxc.cso.uiuc.edu US Mail: UofIllinois, CSO, 1304 W Springfield Ave, Urbana, IL 61801-2910