Hello,

I am setting up NAT on linux and all is working I can ping an external ip address and skype is on, but cant resolve a domain name when on one of the network computers.The network internal info is

111.111.111.7 -node IP
255.255.255.192 -Mask
111.111.111.1 Gateway

111.111.111.1 DNS

The above info results in the PC not resolving domain names, but can pin ips.

when I change the DNS server to an external dns server it all works.

111.111.111.7 -node IP
255.255.255.192 -Mask
111.111.111.1 Gateway

178.12.32.32 -DNS

My issue is this is not how I set it up on windows servers when doing NAT(I guess maybe because on windows the dns server has root hits) The DHCP has the internal server address and gives all internal ips to the clients and they connect.How do I do this in linux so clients get the ip address scheme


111.111.111.7 -node IP
255.255.255.192 -Mask
111.111.111.1 Gateway

111.111.111.1 DNS

Could you clarify what you're trying to do?

Do you run a DNS on your gateway 111.111.111.1 ?
If not, any computer cannot obtain a name resulotion!

You have two basic posibilities:
1st solution
Run your own DNS software (probably 'bind') on .111.1 and set DNS to .111.1
For basic configuration of bind the following steps are enough:
1. set your ISP DNS (178.12.32.32) in /etc/resolve.conf or set by NetworkManager
2. allow your network to resolve hostnames, set /etc/named.conf : allow-query {111.111.111.1/24;};
3. allow your firewall to access port 53 from your network
4. if you use ipv6 check iptables6
5. check /etc/named.conf if DNS is listening on the correct port and IP address: listen-on port 53 { .111.1; }; listen-on-v6 port 53 { XXXX:XXXX:1; };

2nd solution
Let each computer connect ISP directly. This is very easy, if you use a DHCP in your network, just set the NS record in your DHC server settings.

Yes thanks, figured out that I needed bind to have my dns as 111.111.111.1 , thanks for your reply