routing issue with using ipv6 server on remote server

Hi, I think you need to open the internet access in centos server. If networking is working properly then you have to

Both the server able to ping each other because both are in the same network(subnet), most likely autoipv6 configuration feature is causing issue. ========================================= Here is my Education and Certification  Cisco Certificates: Cisco Certified Internetwork Expert (CCIE-R&S#40849) Cisco Certified Internetwork Expert (CCIE-SP#40849) Cisco Certified Network Professional Cisco Certified Network Associate  Juniper Certificates: Juniper Network Certified Internet Professional (JNCIP-SP) Juniper Network Certified Internet Specialist-M/SP Juniper Network Certified Internet Associate-M  B.E. Electronics and Communication =================================================