We will use the ldap3 library and import Server, Connection, and ALL modules from it. ldap3 offers an object-oriented access to the directory servers of LDAP.

Listing 11.6 connects to a remote LDAP server and retrieves the server information and schema as follows:

#!/usr/bin/env python 
# Python Network Programming Cookbook, Second Edition 
  -- Chapter - 11 
# This program is optimized for Python 2.7.12 and
  Python 3.5.2. 
# It may run on any other version with/without
  modifications. 
 
import argparse 
from ldap3 import Server, Connection, ALL 
 
 
def main(address): 
    # Create the Server object with the given address. 
    # Get ALL information. 
    server = Server(address, get_info=ALL) 
    #Create a connection object, and bind with auto
     bind set to true. 
    conn = Connection(server, auto_bind=True) 
     
    # Print the LDAP Server Information. 
    print('******************Server Info**************') 
    print(server.info) 
 
    # Print the LDAP Server Detailed Schema. 
    print('******************Server Schema**************') 
    print(server.schema) 
 
if __name__ == '__main__': 
    parser = argparse.ArgumentParser(description=
                                 'Query LDAP Server') 
    parser.add_argument('--address', action="store",
    dest="address",  default='ipa.demo1.freeipa.org') 
    given_args = parser.parse_args()  
    address = given_args.address 
    main (address) 

Here we pass the address to the LDAP server as a command-line argument to print a detailed information of it shown as following:

$ python 11_6_connect_ldap_server.py --address=ldap.forumsys.com
******************Server Info**************
DSA info (from DSE):
Supported LDAP versions: 3
Naming contexts: 
dc=example,dc=com
    
Supported controls: 
1.2.826.0.1.3344810.2.3 - Matched Values - Control - RFC3876
1.2.840.113556.1.4.319 - LDAP Simple Paged Results - Control - RFC2696
1.3.6.1.1.12 - Assertion - Control - RFC4528
1.3.6.1.1.13.1 - LDAP Pre-read - Control - RFC4527
1.3.6.1.1.13.2 - LDAP Post-read - Control - RFC4527
1.3.6.1.4.1.4203.1.10.1 - Subentries - Control - RFC3672
2.16.840.1.113730.3.4.18 - Proxy Authorization Control - Control - RFC6171
2.16.840.1.113730.3.4.2 - ManageDsaIT - Control - RFC3296
Supported extensions: 
1.3.6.1.1.8 - Cancel Operation - Extension - RFC3909
1.3.6.1.4.1.1466.20037 - StartTLS - Extension - RFC4511-RFC4513
1.3.6.1.4.1.4203.1.11.1 - Modify Password - Extension - RFC3062
1.3.6.1.4.1.4203.1.11.3 - Who am I - Extension - RFC4532
Supported features: 
1.3.6.1.1.14 - Modify-Increment - Feature - RFC4525
1.3.6.1.4.1.4203.1.5.1 - All Op Attrs - Feature - RFC3673
1.3.6.1.4.1.4203.1.5.2 - OC AD Lists - Feature - RFC4529
1.3.6.1.4.1.4203.1.5.3 - True/False filters - Feature - RFC4526
1.3.6.1.4.1.4203.1.5.4 - Language Tag Options - Feature - RFC3866
1.3.6.1.4.1.4203.1.5.5 - language Range Options - Feature - RFC3866
    
Schema entry: 
cn=Subschema
Vendor name: []
Vendor version: []
Other:
objectClass: 
top
OpenLDAProotDSE
structuralObjectClass: 
OpenLDAProotDSE
entryDN: 
    
configContext: 
cn=config
    
******************Server Schema**************
DSA Schema from: cn=Subschema
Attribute types:{'olcAuthIDRewrite': Attribute type: 1.3.6.1.4.1.4203.1.12.2.3.0.6
Short name: olcAuthIDRewrite
Single value: False
Equality rule: caseIgnoreMatch
Syntax: 1.3.6.1.4.1.1466.115.121.1.15 [('1.3.6.1.4.1.1466.115.121.1.15', 'LDAP_SYNTAX', 'Directory String', 'RFC4517')]
Optional in: olcGlobal
Extensions:
X-ORDERED: VALUES
, 'olcUpdateDN': Attribute type: 1.3.6.1.4.1.4203.1.12.2.3.2.0.12
Short name: olcUpdateDN
Single value: True
Syntax: 1.3.6.1.4.1.1466.115.121.1.12 [('1.3.6.1.4.1.1466.115.121.1.12', 'LDAP_SYNTAX', 'DN', 'RFC4517')]
Optional in: olcDatabaseConfig
, 'namingContexts': Attribute type: 1.3.6.1.4.1.1466.101.120.5
Short name: namingContexts
Description: RFC4512: naming contexts
Single value: False
Usage: unknown
Syntax: 1.3.6.1.4.1.1466.115.121.1.12 [('1.3.6.1.4.1.1466.115.121.1.12', 'LDAP_SYNTAX', 'DN', 'RFC4517')]
OidInfo: ('1.3.6.1.4.1.1466.101.120.5', 'ATTRIBUTE_TYPE', 'namingContexts', 'RFC4512')
, 'olcAccess': Attribute type: 1.3.6.1.4.1.4203.1.12.2.3.0.1
Short name: olcAccess
Description: Access Control List
Single value: False
Equality rule: caseIgnoreMatch
Syntax: 1.3.6.1.4.1.1466.115.121.1.15 [('1.3.6.1.4.1.1466.115.121.1.15', 'LDAP_SYNTAX', 'Directory String', 'RFC4517')]
Optional in: olcDatabaseConfig
Extensions:
X-ORDERED: VALUES
, 'businessCategory': Attribute type: 2.5.4.15
Short name: businessCategory
    
........
......

The complete output of the execution for the address https://ipa.demo1.freeipa.org/ipa/ui/ and ldap.forumsys.com are stored in the files 11_6_output_with_ipa.demo1.freeipa.org.txt and 11_6_output_with_ldap.forumsys.com.txt respectively.

Following is a screenshot of the execution, indicating the detailed output of the execution: