evotz Posted March 2, 2015 Share Posted March 2, 2015 Is there anyway to get more information on why we are getting an "IPN Handshake Invalid" for a PayPal payment? 0 Quote Link to comment Share on other sites More sharing options...
sentq Posted March 2, 2015 Share Posted March 2, 2015 maybe fake calls, check this page might help! http://docs.whmcs.com/PayPal#IPN_Handshake_Invalid 0 Quote Link to comment Share on other sites More sharing options...
evotz Posted March 2, 2015 Author Share Posted March 2, 2015 No, pretty sure it's real. Callback is coming from 173.0.81.1 a PayPal IP address. PayPal is showing the callback as failing. I've set the localization for WHMCS to match what PayPal sends. Still getting a IPN Handshake Failed. There's just no information and no way to get any more information about the incident. 0 Quote Link to comment Share on other sites More sharing options...
sentq Posted March 2, 2015 Share Posted March 2, 2015 try to contact WHMCS support directly then 0 Quote Link to comment Share on other sites More sharing options...
RebelOne Posted March 6, 2015 Share Posted March 6, 2015 I began getting IPN Handshake Invalid on 03/21/2015 for no apparent reason. Now all ipn notifications are failing. Paypal is sending me emails alerting me to the fact as well. Nothing changed settings wise so I'm thinking a cpanel update maybe or an apache re-complie. No Idea really but would like to figure this out... 0 Quote Link to comment Share on other sites More sharing options...
WHMCS Support Manager WHMCS John Posted March 8, 2015 WHMCS Support Manager Share Posted March 8, 2015 Hi, Please post the Debug Data from the Billing > Gateway Log page for this payment here for us to review. Be sure to remove the sensitive data before posting. 0 Quote Link to comment Share on other sites More sharing options...
RebelOne Posted March 9, 2015 Share Posted March 9, 2015 HI John- In my case, I think my server is somehow blocking something. Most of the time, there is no record at all in the whmcs gateway log and when there is, there is no data other than the "IPN Handshake Invalid" result. I've disabled the firewall (csf) and mod_security, no joy. Nothing in /var/log/messages either... The paypal ipn simulator is erratic as well. Something on my server must have updated or changed in the last few weeks, but so far... no idea. 0 Quote Link to comment Share on other sites More sharing options...
WHMCS Support Manager WHMCS John Posted March 10, 2015 WHMCS Support Manager Share Posted March 10, 2015 Hi, If you'd like to open a support ticket we can get some more data from your PayPal account and try and help determine the cause. The data are a bit too sensitive to be posted publicly here really. 0 Quote Link to comment Share on other sites More sharing options...
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