We have an issue right now where when our cust service team runs a credit card they at times receive a handshake error. We run a IBM i AS/400 that connects to a backend called Curbstone. Here is a break down of how this works Here is what is supposed to happen.
When credit cards are run curbstone opens a connection to paymenttech.
At this point the IBM I sends along “cipher suite, decryption keys” this information is accepted by paymenttech and the transaction continues.
Here is what is happening now.
Curbstone opens a connection to paymenttech. At this point the IBM I sends along “cipher suite, decryption keys” this information is now rejected by paymenttech the transaction fails and the handshake error pops up. I have run a trccnn on the IBM i and in wireshark. Both curbstone and paymenttech don't see any issues on their end. I did call paymenttech today and a transaction that I saw on the IBM i didn't get to them resulting in the handshake error. I don't think its an issue with our network because it isn't a constant issue. I thought perhaps there was some job running at the time of the handshake error but that doesn't seem to be an issue. This issue ramps up at between 4pm and 6pm on Fridays. Why? I can't seem to find a reason.