I made a software router in CentOS linux and in that made a DNS server. I am using centOS 6..4 for making DNS i applied following steps:

changed the host name = abc.zoom.com and domain name = zoom.com.

then did changes in the named.rfc.1912 file as per

rename named.localhost = forward and named.loopback = reverse

in forward lookups i changed zone "zoom.com" IN { type master; file "forward"; allow-update { none; };

and in reverse lookups i changed

zone "x.168.192.in-addr.arpa" IN { type master; file "reverse"; allow-update { none; };

and then did changes in the named.conf file

options { listen-on port 53 {192.168.x.x;}; listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db"; statistics-file "/var/named/data/named_stats.txt"; memstatistics-file "/var/named/data/named_mem_stats.txt"; allow-query {any;};
recursion yes;

   192.168.x.x is my local DNS address.

then i copied lookups file in /var/named and edited the file "forward"

$TTL 1D @ IN SOA abc.zoom.com. rahul.abc.zoom.com. ( 0 ; serial 1D ; refresh 1H ; retry 1W ; expire 3H ) ; minimum NS abc.zoom.com. abc A 192.168.x.x

and for " reverse"

$TTL 1D @ IN SOA abc.zoom.com. rahul.abc.zoom.com.( 0 ; serial 1D ; refresh 1H ; retry 1W ; expire 3H ) ; minimum NS abc.zoom.com. x PTR abc.zoom.com.

when i put the public ip details in the Eth0 it was automatically redirect in to the resolve.conf

when i checked through dig command the answer, query all were 1.

my system is itself a Software router.In gateway of my all local machine i give my system ip address. however my DNS and Gateway IP is same.

Now the problem is that. i gave the static ips to all my local machines when i give the DNS which i made i.e 192.168.x.x that time my ftp is not connect in filezilla software

E.g: host : pqr.zoom.com ("zoom.com" is my local domain name) username : pqr password : pqr

gives an error: Error: Connection timed out Error: Could not connect to server but if i give the public DNS address it get connected.

i want to solve this problem please give solution on this.