Nmap dns-srv-enum NSE Script


This page contains detailed information about how to use the dns-srv-enum NSE script. For list of all NSE scripts, visit the Nmap NSE Library.

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Overview
Error Messages

Script Overview

Script source code: https://github.com/nmap/nmap/tree/master/scripts/dns-srv-enum.nse
Script categories: discovery, safe
Target service / protocol: -
Target network port(s): -
List of CVEs: -

Script Description

The dns-srv-enum.nse script enumerates various common service (SRV) records for a given domain name. The service records contain the hostname, port and priority of servers for a given service. The following services are enumerated by the script:

  • Active Directory Global Catalog
  • Exchange Autodiscovery
  • Kerberos KDC Service
  • Kerberos Passwd Change Service
  • LDAP Servers
  • SIP Servers
  • XMPP S2S
  • XMPP C2S

Dns-srv-enum NSE Script Arguments

This is a full list of arguments supported by the dns-srv-enum.nse script:

dns-srv-enum.domain

String containing the domain to query

dns-srv-enum.filter

String containing the service to query (default: all)

max-newtargets

Sets the number of the maximum allowed new targets. If set to 0 or less then there is no limit. The default value is 0.

newtargets

If specified, lets NSE scripts add new targets.

- - -
To use these script arguments, add them to the Nmap command line using the --script-args arg1=value,[arg2=value,..] syntax. For example:

nmap --script=dns-srv-enum --script-args dns-srv-enum.domain=value,dns-srv-enum.filter=value <target>

Dns-srv-enum NSE Script Example Usage

Here's an example of how to use the dns-srv-enum.nse script:

nmap --script dns-srv-enum --script-args "dns-srv-enum.domain='example.com'"

Dns-srv-enum NSE Script Example Output

Here's a sample output from the dns-srv-enum.nse script:

| dns-srv-enum:
|   Active Directory Global Catalog
|     service   prio  weight  host
|     3268/tcp  0     100     stodc01.example.com
|   Kerberos KDC Service
|     service  prio  weight  host
|     88/tcp   0     100     stodc01.example.com
|     88/udp   0     100     stodc01.example.com
|   Kerberos Password Change Service
|     service  prio  weight  host
|     464/tcp  0     100     stodc01.example.com
|     464/udp  0     100     stodc01.example.com
|   LDAP
|     service  prio  weight  host
|     389/tcp  0     100     stodc01.example.com
|   SIP
|     service   prio  weight  host
|     5060/udp  10    50      vclux2.example.com
|     5070/udp  10    50      vcbxl2.example.com
|     5060/tcp  10    50      vclux2.example.com
|     5060/tcp  10    50      vcbxl2.example.com
|   XMPP server-to-server
|     service   prio  weight  host
|     5269/tcp  5     0       xmpp-server.l.example.com
|     5269/tcp  20    0       alt2.xmpp-server.l.example.com
|     5269/tcp  20    0       alt4.xmpp-server.l.example.com
|     5269/tcp  20    0       alt3.xmpp-server.l.example.com
|_    5269/tcp  20    0       alt1.xmpp-server.l.example.com

Dns-srv-enum NSE Script Example XML Output

There is no sample XML output for this module. However, by providing the -oX <file> option, Nmap will produce a XML output and save it in the file.xml file.

Author

  • Patrik Karlsson

References

See Also

Related NSE scripts to the dns-srv-enum.nse script:

Visit Nmap NSE Library for more scripts.

The dns-srv-enum.nse script may fail with the following error messages. Check for the possible causes by using the code snippets highlighted below found in the script source code. This can often times help in identifying the root cause of the problem.

Invalid filter (%s) was supplied

Here is a relevant code snippet related to the "Invalid filter (%s) was supplied" error message:

149:	    { name = "XMPP server-to-server", query = {"_xmpp-server._tcp"} },
150:	    { name = "XMPP client-to-server", query = {"_xmpp-client._tcp"} },
151:	  }
152:	
153:	  if ( not(checkFilter(services)) ) then
154:	    return stdnse.format_output(false, ("Invalid filter (%s) was supplied"):format(arg_filter))
155:	  end
156:	
157:	  local threads, result = {}, {}
158:	  for name, queries in parseSvcList(services) do
159:	    if ( not(arg_filter) or 0 == #arg_filter or

Version

This page has been created based on Nmap version 7.92.

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