I have the following probrem.
I upgraded from Progress 10.2A to the 11.6sp3 server runs on the CentOS 7 64bits (firewall disabled)

Clients runs OpenEdge 11.6 sp3 32bits, the app is 4gl.
Some clients running Windows 10 (64 1607) are slow in accessing the bank, but by manually deactivating and reactivating IPv6, access to the bank stabilizes, until restart Windows .
I tried disabling i Network Interface Properties (IPv6)
I've tried disabling the services teredo, 6to4, isatap and computer browser

Nothing definitely solved the problem yet, someone would have an idea?