Internal clients cannot access the internet

[Bienvenu Ngala]

Hi All,

My study lab at home is configured with a router facing the internet, NAT translation is working fine and that router is directly connected to a catalyst switch. Now all my VMs servers and clients cannot connect to the internet unless I manually configured a public DNS (example 8.8.8.8) on the network property of each clients.

From inside the LAN, all the clients can ping 8.8.8.8 and the my router default gateway 192.168.0.1 but they cannot browse on the internet.

I have got an internal DNS server which resolve all the VMs on the network but even itself cannot access the internet without a public DNS.

Please I need your help.

[Reza Sharifi]

Hi,

If you have DHCP server on the network, you can have it assign Google DNS IP (8.8.8.8) to your users.

HTH 

[Bienvenu Ngala]

Many thanks  Reza,

You are right, users can have their IP address assigned by DHCP but how about Servers their no space to assign goggle DNS because I have got on my internal 2 DNS servers one Windows and one Linux.

Let me bring you back 4 weeks ago, it was working completely fine without a google DNS on my configuration. But since I changed my ISP and changed my internet router that's where the trouble started.

NB: On my DNS servers Local Area Connection if I assign statically on the DNS (part), the DNS server IP address it will not access the Internet but if I put 172.0.0.1 it will work. what is the real problem?

Regards,

Ben

[Martin Carr · Accepted solution]

You need to change the public DNS servers that your internals recurse. I suspect these are that of your previous ISP, which will no longer be permitted.

You need to set the forwarders on your DNS servers to those you choose to use.

Martin

[Bienvenu Ngala]

Hi Martin,

Many thanks for saving me a lot of headache, the problem was with my previous ISP. I have changed thinks now it is working.

Thank you.