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Get IP from domain name from an uncensored DNS #39

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opened 2024-11-04 16:26:52 +01:00 by Benjamin_Loison · 4 comments
Benjamin_Loison commented 2024-11-04 16:26:52 +01:00
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Would help Improve_websites_thanks_to_open_source/issues/494#issuecomment-2425603.

Would help [Improve_websites_thanks_to_open_source/issues/494#issuecomment-2425603](https://codeberg.org/Benjamin_Loison/Improve_websites_thanks_to_open_source/issues/494#issuecomment-2425603).
Benjamin_Loison commented 2024-11-04 16:28:54 +01:00
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man nslookup
Output: 
NSLOOKUP(1)                                                      BIND 9                                                     NSLOOKUP(1)

NAME
       nslookup - query Internet name servers interactively

SYNOPSIS
       nslookup [-option] [name | -] [server]

DESCRIPTION
       nslookup  is a program to query Internet domain name servers.  nslookup has two modes: interactive and non-interactive. Interac‐
       tive mode allows the user to query name servers for information about various hosts and domains or to print a list of hosts in a
       domain.  Non-interactive mode prints just the name and requested information for a host or domain.

ARGUMENTS
       Interactive mode is entered in the following cases:

       a. when no arguments are given (the default name server is used);

       b. when the first argument is a hyphen (-) and the second argument is the host name or Internet address of a name server.

       Non-interactive mode is used when the name or Internet address of the host to be looked up is given as the first  argument.  The
       optional second argument specifies the host name or address of a name server.

       Options  can also be specified on the command line if they precede the arguments and are prefixed with a hyphen. For example, to
       change the default query type to host information, with an initial timeout of 10 seconds, type:

          nslookup -query=hinfo  -timeout=10

       The -version option causes nslookup to print the version number and immediately exit.

INTERACTIVE COMMANDS
       host [server]
              This command looks up information for host using the current default server or using server, if specified. If host is  an
              Internet  address and the query type is A or PTR, the name of the host is returned. If host is a name and does not have a
              trailing period (.), the search list is used to qualify the name.

              To look up a host not in the current domain, append a period to the name.

       server domain | lserver domain
              These commands change the default server to domain; lserver uses the initial server to look up information about  domain,
              while server uses the current default server. If an authoritative answer cannot be found, the names of servers that might
              have the answer are returned.

       root   This command is not implemented.

       finger This command is not implemented.

       ls     This command is not implemented.

       view   This command is not implemented.

       help   This command is not implemented.

       ?      This command is not implemented.

       exit   This command exits the program.

       set keyword[=value]
              This command is used to change state information that affects the lookups. Valid keywords are:

              all    This  keyword  prints  the current values of the frequently used options to set. Information about the current de‐
                     fault server and host is also printed.

              class=value
                     This keyword changes the query class to one of:

                     IN     the Internet class

                     CH     the Chaos class

                     HS     the Hesiod class

                     ANY    wildcard

                     The class specifies the protocol group of the information. The default is IN; the abbreviation for this keyword is
                     cl.

              nodebug
                     This keyword turns on or off the display of the full response packet, and any intermediate response packets,  when
                     searching. The default for this keyword is nodebug; the abbreviation for this keyword is [no]deb.

              nod2   This keyword turns debugging mode on or off. This displays more about what nslookup is doing. The default is nod2.

              domain=name
                     This keyword sets the search list to name.

              nosearch
                     If  the lookup request contains at least one period, but does not end with a trailing period, this keyword appends
                     the domain names in the domain search list to the request until an answer is received. The default is search.

              port=value
                     This keyword changes the default TCP/UDP name server port to value from its default, port 53. The abbreviation for
                     this keyword is po.

              querytype=value | type=value
                     This keyword changes the type of the information query to value. The defaults are A and then AAAA;  the  abbrevia‐
                     tions for these keywords are q and ty.

                     Please  note  that  it is only possible to specify one query type. Only the default behavior looks up both when an
                     alternative is not specified.

              norecurse
                     This keyword tells the name server to query other servers if it does not have the information. The default is  re‐
                     curse; the abbreviation for this keyword is [no]rec.

              ndots=number
                     This keyword sets the number of dots (label separators) in a domain that disables searching. Absolute names always
                     stop searching.

              retry=number
                     This keyword sets the number of retries to number.

              timeout=number
                     This keyword changes the initial timeout interval to wait for a reply to number, in seconds.

              novc   This  keyword indicates that a virtual circuit should always be used when sending requests to the server.  novc is
                     the default.

              nofail This keyword tries the next nameserver if a nameserver responds with SERVFAIL or a referral  (nofail),  or  termi‐
                     nates the query (fail) on such a response. The default is nofail.

RETURN VALUES
       nslookup returns with an exit status of 1 if any query failed, and 0 otherwise.

IDN SUPPORT
       If  nslookup  has been built with IDN (internationalized domain name) support, it can accept and display non-ASCII domain names.
       nslookup appropriately converts character encoding of a domain name before sending a request to a DNS server or displaying a re‐
       ply from the server.  To turn off IDN support, define the IDN_DISABLE environment variable. IDN support is disabled if the vari‐
       able is set when nslookup runs, or when the standard output is not a tty.

FILES
       /etc/resolv.conf

SEE ALSO
       dig(1), host(1), named(8).

AUTHOR
       Internet Systems Consortium

COPYRIGHT
       2024, Internet Systems Consortium

9.18.28-0ubuntu0.24.04.1-Ubuntu                                2024-07-08                                                   NSLOOKUP(1)
```bash man nslookup ``` <details> <summary>Output:</summary> ``` NSLOOKUP(1) BIND 9 NSLOOKUP(1) NAME nslookup - query Internet name servers interactively SYNOPSIS nslookup [-option] [name | -] [server] DESCRIPTION nslookup is a program to query Internet domain name servers. nslookup has two modes: interactive and non-interactive. Interac‐ tive mode allows the user to query name servers for information about various hosts and domains or to print a list of hosts in a domain. Non-interactive mode prints just the name and requested information for a host or domain. ARGUMENTS Interactive mode is entered in the following cases: a. when no arguments are given (the default name server is used); b. when the first argument is a hyphen (-) and the second argument is the host name or Internet address of a name server. Non-interactive mode is used when the name or Internet address of the host to be looked up is given as the first argument. The optional second argument specifies the host name or address of a name server. Options can also be specified on the command line if they precede the arguments and are prefixed with a hyphen. For example, to change the default query type to host information, with an initial timeout of 10 seconds, type: nslookup -query=hinfo -timeout=10 The -version option causes nslookup to print the version number and immediately exit. INTERACTIVE COMMANDS host [server] This command looks up information for host using the current default server or using server, if specified. If host is an Internet address and the query type is A or PTR, the name of the host is returned. If host is a name and does not have a trailing period (.), the search list is used to qualify the name. To look up a host not in the current domain, append a period to the name. server domain | lserver domain These commands change the default server to domain; lserver uses the initial server to look up information about domain, while server uses the current default server. If an authoritative answer cannot be found, the names of servers that might have the answer are returned. root This command is not implemented. finger This command is not implemented. ls This command is not implemented. view This command is not implemented. help This command is not implemented. ? This command is not implemented. exit This command exits the program. set keyword[=value] This command is used to change state information that affects the lookups. Valid keywords are: all This keyword prints the current values of the frequently used options to set. Information about the current de‐ fault server and host is also printed. class=value This keyword changes the query class to one of: IN the Internet class CH the Chaos class HS the Hesiod class ANY wildcard The class specifies the protocol group of the information. The default is IN; the abbreviation for this keyword is cl. nodebug This keyword turns on or off the display of the full response packet, and any intermediate response packets, when searching. The default for this keyword is nodebug; the abbreviation for this keyword is [no]deb. nod2 This keyword turns debugging mode on or off. This displays more about what nslookup is doing. The default is nod2. domain=name This keyword sets the search list to name. nosearch If the lookup request contains at least one period, but does not end with a trailing period, this keyword appends the domain names in the domain search list to the request until an answer is received. The default is search. port=value This keyword changes the default TCP/UDP name server port to value from its default, port 53. The abbreviation for this keyword is po. querytype=value | type=value This keyword changes the type of the information query to value. The defaults are A and then AAAA; the abbrevia‐ tions for these keywords are q and ty. Please note that it is only possible to specify one query type. Only the default behavior looks up both when an alternative is not specified. norecurse This keyword tells the name server to query other servers if it does not have the information. The default is re‐ curse; the abbreviation for this keyword is [no]rec. ndots=number This keyword sets the number of dots (label separators) in a domain that disables searching. Absolute names always stop searching. retry=number This keyword sets the number of retries to number. timeout=number This keyword changes the initial timeout interval to wait for a reply to number, in seconds. novc This keyword indicates that a virtual circuit should always be used when sending requests to the server. novc is the default. nofail This keyword tries the next nameserver if a nameserver responds with SERVFAIL or a referral (nofail), or termi‐ nates the query (fail) on such a response. The default is nofail. RETURN VALUES nslookup returns with an exit status of 1 if any query failed, and 0 otherwise. IDN SUPPORT If nslookup has been built with IDN (internationalized domain name) support, it can accept and display non-ASCII domain names. nslookup appropriately converts character encoding of a domain name before sending a request to a DNS server or displaying a re‐ ply from the server. To turn off IDN support, define the IDN_DISABLE environment variable. IDN support is disabled if the vari‐ able is set when nslookup runs, or when the standard output is not a tty. FILES /etc/resolv.conf SEE ALSO dig(1), host(1), named(8). AUTHOR Internet Systems Consortium COPYRIGHT 2024, Internet Systems Consortium 9.18.28-0ubuntu0.24.04.1-Ubuntu 2024-07-08 NSLOOKUP(1) ``` </details>
Benjamin_Loison commented 2024-11-04 16:29:37 +01:00
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nslookup lemnoslife.com 8.8.8.8

I suspect that DNS request to other servers are blocked.

An HTTPS alternative would be fine.

Maybe some are blocked, see Improve_websites_thanks_to_open_source/issues/494#issuecomment-2425606.

```bash nslookup lemnoslife.com 8.8.8.8 ``` I suspect that DNS request to other servers are blocked. An HTTPS alternative would be fine. Maybe some are blocked, see [Improve_websites_thanks_to_open_source/issues/494#issuecomment-2425606](https://codeberg.org/Benjamin_Loison/Improve_websites_thanks_to_open_source/issues/494#issuecomment-2425606).
Benjamin_Loison commented 2024-11-04 17:17:26 +01:00
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DuckDuckGo search Curl DNS over HTTPS.

I would like a curl solution.

DuckDuckGo search *Curl DNS over HTTPS*. I would like a curl solution.
Benjamin_Loison commented 2024-11-04 17:17:46 +01:00
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curl -s -H 'accept: application/dns-json' 'https://cloudflare-dns.com/dns-query?name=lemnoslife.com' | jq .
Output: 
{
  "Status": 0,
  "TC": false,
  "RD": true,
  "RA": true,
  "AD": false,
  "CD": false,
  "Question": [
    {
      "name": "lemnoslife.com",
      "type": 1
    }
  ],
  "Answer": [
    {
      "name": "lemnoslife.com",
      "type": 1,
      "TTL": 56,
      "data": "54.37.228.22"
    }
  ]
}

Source: the Super User answer 1562943

works fine on my Linux Mint 22 Cinnamon Framework 13 on mobile data but also on Ubuntu 24 work computer.

```bash curl -s -H 'accept: application/dns-json' 'https://cloudflare-dns.com/dns-query?name=lemnoslife.com' | jq . ``` <details> <summary>Output:</summary> ```json { "Status": 0, "TC": false, "RD": true, "RA": true, "AD": false, "CD": false, "Question": [ { "name": "lemnoslife.com", "type": 1 } ], "Answer": [ { "name": "lemnoslife.com", "type": 1, "TTL": 56, "data": "54.37.228.22" } ] } ``` </details> Source: [the Super User answer 1562943](https://superuser.com/a/1562943) works fine on my Linux Mint 22 Cinnamon Framework 13 on mobile data but also on Ubuntu 24 work computer.
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Reference: Benjamin_Loison/linux#39