I have two machines, A and B. Until recently A served as a local
name server for both A and B and everything worked fine. Then I have copied all necessary files to the machine B and
set it up as a local name server (by putting its address in resolv.conf). This works fine too both from A and B. However if after calling nslookup
I change server to A any attempt at a query results in a message "No response from server", even if I do it on machine A. What could be the problem? Changing server to other ezternal nameservers works fine too. Why does machine A refuse to respond now to nslookup query?