PayPal subscription 503 errors

[mrcranky]

So, I finally got my test environment up to 4.2.5 and got rid of vbseo, but I now have another issue.

The paypal IPN isn't working. I dont know if it ever has, but I would like to be able to offer some upgrades for my users. The whole process works up to the point of paypal Posting back the IPN data. In my paypal logs I see they get a 503 error and in my control panel I see constant failures as they keep retrying.

vb_error_code	authentication_failure
GET
method	paypal
POST
insurance_amount	0.00
discount	0.00
transaction_subject
txn_type	web_accept

Date/time created09/09/2018 14:20 BST

Original/ResentOriginal

Latest delivery attempt date/time09/09/2018 14:26 BST

Notification URLhttp://uat.XXXXX.XXXX/payment_gateway.php?method=paypal

HTTP response codeWhat's this?503

Delivery statusRetrying

No. of retries5


Any suggestions welcome.

[In Omnibus]

A 503 error means the service is unavailable. That indicates an issue with PayPal, not with vBulletin. It's usually temporary. Server hiccup, maintenance, DNS issue, etc.

[mrcranky]

A 503 error means the service is unavailable. That indicates an issue with PayPal, not with vBulletin. It's usually temporary. Server hiccup, maintenance, DNS issue, etc.

They are getting a 503 from the /payment_gateway.php?method=paypal page on my server.