Dear expertsI configure my PBX server to work with one VoIP provider. When I put the server in blank network, mean that without VLANs. The IP PBX server can register to the VoIP provider system normally and I can make call out and receive calls norma...

Dear expertsI configure my PBX server to work with one VoIP provider. When I put the server in blank network, mean that without VLANs. The IP PBX server can register to the VoIP provider system normally and I can make call out and receive calls norma...

Hi allI need your help. I have 02 router cisco 892 for VPN site to site. I reconfigured the second one and they can ping public IP together. However they cannot ping other site's internal IP address. The second one does not have certificate like the ...

Hi allI can configure router to allow external access to internal server by static NAT. Are there any way to configure without static NAT, and we can use ACL to prevent them from some services?Thanks for all your adviseHere is the example configurati...

Hi allI got in trouble when I can access google search, but cannot access gmail site. Additionally, I cannot access any site related to Microsoft or sometime it is too slow. I think it maybe relate to my DNS server or Cisco router configuration.Pleas...