FlorianPINTO

Thank you for your answer, Zyxel technical support find the problem. We change NAT parameter TCP to UDP. Regards

Hi @Zyxel_Judy , Thank you for your answer. This is my first time with Zyxel material, with my previous material, I use the DynDNS adress and I add the port at the end. In my case, the DynDNS adress is http://hellastest.dyndns.ws/ and to go to the port 8001 I use http://hellastest.dyndns.ws:8001 This is OK with Zyxel…