Ever since the switch to TLS1.2, can not connect to RETS

asked 2022-05-02 07:57:52 -0600

TSetliff gravatar image

Even when I try to use RETSConnector, it will not make a connection. I get error "Could not create SSL/TLS secure channel". I do connect with other vendors using TLS1.2 and do not have an issue. I do not know what to try next. Appreciate any direction you may be able to provide.

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What is your URL and login name?

bwolven gravatar imagebwolven ( 2022-05-02 08:34:50 -0600 )edit

https://nrv-rets.paragonrels.com/rets... and sei is login name... just some additional info... If I paste that url into a web browser and log in, it seems to log in fine. I think this tells me that there is some issue within my code that connects to the Rets server but I'm not clear what that may be. I have tried many suggestions from StackOverflow but none seem to work.

TSetliff gravatar imageTSetliff ( 2022-05-02 08:43:20 -0600 )edit

With HTTPS we require Basic authentication, Are you using that?
Also, can you connect to other Paragon RETS sites or just other MLSs?

bwolven gravatar imagebwolven ( 2022-05-02 08:51:44 -0600 )edit

We do connect to http://bcar.rets.paragonrels.com/rets... but that doesnt appear to have been switched over to https yet. I am using basic authentication. We can connect with CoreLogic and Matrix, both of which use https and TLS12 if I'm not mistaken.

TSetliff gravatar imageTSetliff ( 2022-05-02 09:07:11 -0600 )edit

You can try it on BCAR, but make sure to change it to "bcar-rets.paragonrels.com".
When you checked using the browser, was it on the same computer you do your pulls from?

bwolven gravatar imagebwolven ( 2022-05-02 09:24:23 -0600 )edit

Yes sir, it was the same server

TSetliff gravatar imageTSetliff ( 2022-05-02 09:28:10 -0600 )edit

For what its worth, if I use http://nrv-rets.paragonrels.com/rets/... (no s in http), I am able to connect and pull the data but I think I read that that would eventually stop working.

TSetliff gravatar imageTSetliff ( 2022-05-02 09:30:38 -0600 )edit

I was able to connect with your account to NRV as HTTPS without issue.
I used RETS Connector version 1.2.7220.
What version are you using?

bwolven gravatar imagebwolven ( 2022-05-02 11:35:28 -0600 )edit

1.2.7220... I did a check for Upgrades but it says No Upgrades detected.

TSetliff gravatar imageTSetliff ( 2022-05-02 12:18:26 -0600 )edit

Sorry. I had a typo in the version. We are using the same one.
What OS are you running on the box where you are running your downloads?
And is it up-to-date?
You can try running this on https://nrv-rets.paragonrels.com and see if it shows anything.

https://www.ssllabs.com/ssltest/analyze.html
bwolven gravatar imagebwolven ( 2022-05-03 08:27:22 -0600 )edit

On my desktop system, I am running Windows 8.1 Pro Version 6.3.9600. It does update pretty regularly so I would think it is current. On the server where the code runs in batch, it's running Windows Server 2012 Standard. There is a fair chance that it is not up to date but I wouldnt expect it to be too far behind. On both systems, I get the same connection error when using HTTPS in the URL

TSetliff gravatar imageTSetliff ( 2022-05-03 09:03:16 -0600 )edit

Here's some things you can check: 

https://docs.microsoft.com/en-us/mem/configmgr/core/plan-design/security/enable-tls-1-2-client
bwolven gravatar imagebwolven ( 2022-05-03 09:30:08 -0600 )edit

Thanks!!! Appreciate your patience and suggestions to try and help resolve this. Will keep you posted!!

TSetliff gravatar imageTSetliff ( 2022-05-03 09:51:00 -0600 )edit

We had a similar issue with a Paragon WebAPI feed. Our LibRETS based application wouldn't work on a server running Windows Server 2012 due to SSL issues (although if you used a web browser it was able to log in). Running it on a Windows 10 box would work. We had to upgrade the server OS. In our case up to Windows Server 2022.

pstallings gravatar imagepstallings ( 2022-05-04 08:56:58 -0600 )edit
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