DNS problem
 

We recently moved our network from one t1 service to another. I changed all the ip numbers in named db. to reflect the new ip address, including ns1 and ns2. I can reslove domain names of websites we host internally and can also ping them (however, it is very slow to respond). We cannot resolve them form the external. Also cannot resolve any fqdn's to outside with dig. We are running Redhat 7.1 on hp servers as dns server. Any suggestions. Thanks

If you moved yor name servers for a zone did you also change the host information for your domain? (ie: does the ns information for ns1.yourdomain.com point to the new name/ip, and did you register a new name server or change the name server)

There are some online tools like samspade.org which can give you some clues as to how things look outside your network.

Did you change the address info of all the servers involved in the changeover (IP addr/mask, route, default GW)?

Problem solved. It was an interface config problem. Thanks