We help IT Professionals succeed at work.

Looking for ways-to-integrate in premise ad-with-saas-apps

175 Views
Last Modified: 2018-11-07
Hello,

We are looking for ways to integrate our local AD with a saas application (Zixs). This is a mail filter solution that will be used to filter inbound/outbound mail flow. The users will have a site that they will use to authenticate to release their spam. We want them to use their AD user and password to authenticate to the site and get to their spam. The vendor mentioned they support LDAP and secure LDAP but I am not sure what my options are to get this integration done.

We use on premise AD running on windows 2012 DCs.

Thank you!
Comment
Watch Question

Shaun VermaakSenior Consultant
CERTIFIED EXPERT
Awarded 2017
Distinguished Expert 2019

Commented:
You can use an external site and connect your local DS to AD Azure or deploy an AD FS server on-premise

You can alternatively use an internal site (which you can publish externally with something like WAP) and change authentication method of the site to LDAP similarily to My Free/Open-Source Self-Service Password Reset tool for Active Directory (Look at the web.config)
https://www.experts-exchange.com/articles/31477/Free-Open-Source-Self-Service-Password-Reset-tool-for-Active-Directory.html

Author

Commented:
I am looking for a way to avoid Azure. I would like to use secure ldap and read only DC in the DMZ. Anyone has done this setup before?

Author

Commented:
The customer would like to leverage their existing DMZ and infrastructure.
Shaun VermaakSenior Consultant
CERTIFIED EXPERT
Awarded 2017
Distinguished Expert 2019

Commented:
I am looking for a way to avoid Azure.
Second part of my comment is not Azure

I would like to use secure ldap and read only DC in the DMZ
Like published externally? Don't do that

Author

Commented:
Sorry for the editing zixs saas  supports  secure LDAP.
Senior Consultant
CERTIFIED EXPERT
Awarded 2017
Distinguished Expert 2019
Commented:
This problem has been solved!
(Unlock this solution with a 7-day Free Trial)
UNLOCK SOLUTION
yo_beeDirector of Information Technology
CERTIFIED EXPERT

Commented:
I have Mimecast for my solution and I use LDAP setup between the my on-prem AD and mimecast.

I have my firewall ACL to only allow communication from Mimecast subnet.

LDAPS is a preferred method if you can support.

If your service does support ADFS for SSO I would look into setting it up.
https://docs.microsoft.com/en-us/windows-server/identity/ad-fs/deployment/best-practices-securing-ad-fs
Shaun VermaakSenior Consultant
CERTIFIED EXPERT
Awarded 2017
Distinguished Expert 2019

Commented:
I have Mimecast for my solution and I use LDAP setup between the my on-prem AD and mimecast.
Correct, but their main integration points are ADFS and Azure AD. I will never run LDAP(S) over the Internet.
yo_beeDirector of Information Technology
CERTIFIED EXPERT

Commented:
I will look into this. Thanks Shaun.

Author

Commented:
Why LDAPs is discouraged? Just asking to understand the cons
btanExec Consultant
CERTIFIED EXPERT
Distinguished Expert 2019

Commented:
LDAPS is secure by default as long as proper ciphers are negotiated. Even SSL has weak ciphers. But the whole idea is to reduce exposure of your entire AD DS to the Internet.

Nothing is silver bullet so if the AD is compromised due to lapsea or misconfigurations, the privileged access gained will give chance to penetrate through the internal. It is all about risk acceptance. When something really happened and user ia alright to manage the aftermath it is fine but most if the time they are not.

Connection to Internet from remote should always consider VPN and expose portion of the internal AD that really need to be use rather the entire AD DS. External threat to DDOS attack against LDAP/S is viable and service outage may be part of it.
Shaun VermaakSenior Consultant
CERTIFIED EXPERT
Awarded 2017
Distinguished Expert 2019

Commented:
LDAPS is secure by default as long as proper ciphers are negotiated. Even SSL has weak ciphers. But the whole idea is to reduce exposure of your entire AD DS to the Internet.
There is a big difference between transport security, protocol security and exposure. With HTTPS you can reverse proxy the HTTPS traffic. With LDAPS you are literally exposing your DCs to the world. No one will ever be able to convince me to use it when technologies such as AD-FS, OAuth, AD Azure etc. exist
btanExec Consultant
CERTIFIED EXPERT
Distinguished Expert 2019

Commented:
Indeed the known port for LDAPS is an obvious target. Web proxy or broker is needed and it should even be application aware to manage the access using the SAML or OAuth token. These are preferred for online identity federation with more API interfaces released for greater application eservice method call.

Author

Commented:
Could you please advise on a a good ADFS implementation document that I can use to test it?
yo_beeDirector of Information Technology
CERTIFIED EXPERT

Commented:
My link walks you through the steps.
This is what I used to implement my ADFS and Web Application Proxy.
yo_beeDirector of Information Technology
CERTIFIED EXPERT

Commented:
yo_beeDirector of Information Technology
CERTIFIED EXPERT

Commented:
btanExec Consultant
CERTIFIED EXPERT
Distinguished Expert 2019

Commented:

Author

Commented:
Ok

Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions