Locate closest domain controller using Java

Question

I have to connect Active Directory and fetch data based on the domain names. Using LDAP connection with Java. For this I wanted to identify closest domain controller first. Is there any method or API available in Java to identify closest domain controller based on domain name?

Look into https://docs.ldap.com/ldap-sdk/docs/advantages/ease-of-use.html — JCompetence, Nov 13 '20 at 11:52
The question in we will be provided with only domain name and port details(example.com and 389). env.put(Context.PROVIDER_URL, "ldap://server.example.com:389/"); We have to identify the nearby server based on the domain name, so that we can pass it as ldap://server.example.com:389/ to create connection. — karthik raja, Nov 16 '20 at 14:17

score 0 · Answer 1 · answered Jan 19 '22 at 03:52

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To locate the domain controllers we can use LDAP queries(with site name) in java code.

Ex : srv _ldap._tcp.sitename._sites.example.net.local

answered Jan 19 '22 at 03:52

karthik raja

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score 0 · Answer 2 · answered Mar 03 '22 at 01:49

According to Microsoft's How domain controllers are located in Windows, you can look up the LDAP SRV records of either of these forms:

_ldap._tcp.domainname
_ldap._tcp.dc._msdcs.domainname - this is karthik's sitename._sites example.

E.g. nslookup -type=srv _ldap._tcp.company.int if your computer's FQDN is name.company.int.

At least where I'm testing, it doesn't seem to give them with a weight or priority to indicate the closest. I found a similar question on ServerFault, Finding closest Domain Controller through LDAP, that dives further into figuring out the closest.

Locate closest domain controller using Java

2 Answers2