Hello Guys! I partially resolved the issue. I disconected the NAS from the Network and the Internet is full stable now. So looks like the Synology NAS is causing the issue. I opened some ports with...

Model : Hardware Version : Firmware Version : ISP : Firmware 4.1.0 Build 20160517 Rel 35411 Archer C9 [B]Hardware Version Archer C9 V1.0[/B] Hi Guys, I appreciate if you can give me some guidance as...