SA with NLB

[lawpak_]

hi all,

We are trying to deploy the web application for CRM 2011 with netowrk load balancer (NLB) under our SSLVPN , there is no problem to access the CRM via NLB on internal workstation. After the configuration under our SA, we can see the link after logon the SA, then i clicked the link, it keeps prompt us enter the logon and password even i typed in the correct id and password.

Any special setting it needs?

And our SSLVPN is SA 4500 with 7.1R2 (build 18193) and NLB is F5 1600.

Thanks,

Kat

[zanyterp_]

are you staying on the same system? if you bypass the NLB, does it work?

what does your user access log show?

are you trying to do SSO as well?

[lawpak_]

Yes, I stayed at same environment, if it points to either one of the host, it is working fine. And it is working fine as well then without SSLVPN.

How to check the user log, as i'm just a beginner of SA.

Yes, I applied SSO already.

how I start to troubleshoot?

Regards,

Lawpak

[lawpak_]

I find a minor ERR24617

2012-06-21 14:47:37 - XXXXX-SA-01 - [202.XX.XX.XX] XXXXXXX\kat.law(XXXXX Users)[IT Support, Domain Users, Open Asset, GlobalPilot, Project Images, CRM] - Fetch Kerberos TGS for user kat.law, TGT user kat.law, realm HK.XXXXX.COM, host crm_vpn.hk.aedas.com failed: Fetch TGS fetch error: Server not found in Kerberos database

Does it related?

regards,

Lawpak_

[kalagesan_]

Hi Lawpak,

Does CRM access working if you disable the SSO.

I believe that you are using Kerbroes SSO, "Server not found in Kerberos database" can come if the KDC(Key Distribution Center) could not translate the SPN (Server Principal Name) from the KDC request into an account in the Active Directory. This generally happens due to multiple SPN created for the service on domain controller.

Please use the below KB to reolves the issue:

http://kb.pulsesecure.net/InfoCenter/index?page=content&id=KB17804&cat=ssl_vpn&actp=LIST&smlogin=tru...

Also instead of using kerbroes SSO can you try using NTLM if possible

Hope this helps.

NOTE:
Please mark this post as 'accepted solution' if this answers your question that way it might help others as well, a kudo would be a bonus thanks!!

Regards,
Kannan

[zanyterp_]

---

@lawpak wrote:

I find a minor ERR24617

2012-06-21 14:47:37 - XXXXX-SA-01 - [202.XX.XX.XX] XXXXXXX\kat.law(XXXXX Users)[IT Support, Domain Users, Open Asset, GlobalPilot, Project Images, CRM] - Fetch Kerberos TGS for user kat.law, TGT user kat.law, realm HK.XXXXX.COM, host crm_vpn.hk.aedas.com failed: Fetch TGS fetch error: Server not found in Kerberos database

Does it related?

regards,

Lawpak

---

yes, that means that crm_vpn.hk.aedas.com does not exist as a server in your environment that the user has access to for KDC intermediation.

officially, Microsoft does not support SSO with KDC using load balancing as each server needs to be listed. I have heard of it working as long as an alias exists for that server in the AD database.

[lawpak_]

Hi Kannan,

I tried the command "setspn -x" on my DCs, but the result look like there is no "-x" option, the result is listed on below:

(My AD version is 2003)

And i have tested it without SSO also, it still keeps prompt me to input login ID and password.

regards,

lawpak

-------------------------------------

setspn -x

Usage: setspn [switches data] computername Where "computername" can be the name or domain\name

Switches: -R = reset HOST ServicePrincipalName Usage: setspn -R computername -A = add arbitrary SPN Usage: setspn -A SPN computername -D = delete arbitrary SPN Usage: setspn -D SPN computername -L = list registered SPNs Usage: setspn [-L] computername Examples: setspn -R daserver1 It will register SPN "HOST/daserver1" and "HOST/{DNS of daserver1}" setspn -A http/daserver daserver1 It will register SPN "http/daserver" for computer "daserver1" setspn -D http/daserver daserver1 It will delete SPN "http/daserver" for computer "daserver1"

-------------------------------------

[zanyterp_]

are you using servert 2003 or 2008?

[lawpak_]

our DC is windows 2003 and AD version is 2003 as well.

regards,

lawpak

[zanyterp_]

Does your NLB name exist as one of your delegated hosts? If not, you need to get that set