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SIM relay response url stopped working

I have a SIM relay response url that has been working for the last couple of years. Now it stopped working since yeasterday, no relay posting back to my site (hosted on godaddy), immediately get a time out error. I have not made any changes at all.  The strange thing is when I change the x_relay_url to any other public site, it works, but my site, it doesn't, even if we removed the php script, just my root domain, it still doesn't work. Please help! Thanks.



Hi binghou10 ,

GoDaddy tends to issue SSL certificates that require SNI support. This is not yet supported by Authorize.Net and a recent update to your certificate could be the cause of the problem. But this is just a guess, for any real details I would recommend contacting Developer@Authorize.Net directly so that we can look at your actual url.




Administrator Administrator

What was the resolution on this issue? I am experiencing this same issue.


Hello @binghou10 , @llong 


Are you still experiencing this issue?  If you are using GoDaddy and still experiencing problems, I would suggest contacting them for assistance.



I have also just experienced this same issue with the relay response timig out. It was working, then all of a sudden it wasn't. My relay response URL is to a root directory success.php file. Any thoughts on how to troubleshoot.


Nothing was changed on the server or website to initiate this error. Transactions are being captured in the unsettled report and a receipt page is displayed, however, users are not routed back to the website and the transaction ID# is not being captured on the website for our confirmations.

I resolved this issue in my situation as follows:


Checked the log errors on the server and found the following:

[Mon Aug 11 17:29:56 2014] [error] [client] ModSecurity: Access denied with code 406 (phase 2). Operator EQ matched 0 at REQUEST_HEADERS. [file "/usr/local/apache/conf/modsec-imh/19_bad_bots.conf"] [line "13"] [id "13009"] [rev "1"] [msg "Request Missing a User Agent Header"] [severity "NOTICE"] [tag "OWASP_CRS/PROTOCOL_VIOLATION/MISSING_HEADER_UA"] [hostname ""] [uri "/plugins/system/success.php"] [unique_id "U@k11BfrwscAADr1OQcAAAAj"]


The hosting provider recently enabled a new Mod Security rule which requires a User Agent Header in my file.  My file, success.php, is using an http request type without declaring a user agent type. Therefore, access was denied and timing out. I had support disable the Mod Security rule until I can revise the php file to include a user agent type. Hope this helps others.


See Document Conformance at