Networking and System Administration

If you have a simple DNS setting without Reverse DNS, this might help you to setup. Step 1: Add Reverse zone entery in /etc/bind/named.conf // add local zone definitions here zone "0.168.192.in-addr.arpa" { type master; file "/etc/bind/yourdomain.rev"; zone "yourdomain.com" { type master; file "/etc/bind/yourdomain.com"; allow-query { any; }; Step 2: Create the /etc/bind/yourdomain.rev file $TTL 300 0 @ IN SOA ns.yourdomain.com. postmaster.yourdomain.com. ( 1312 ; Serial 300 ; Refresh 150 ; Retry 4W ; Expire 1H ) ; Negative Cache TTL ; ; NS ; IN NS ns.yourdomain.com. 1 IN PTR www.yourdomain.com....

It is weired that IPCOP block the tftp traffic from external server to internal. In order to work properly we have to add rule manually in the /etc/rc.d/ imran@imran-laptop:~$ ssh root@192.168.0.1 -p 222 root@10.47.0.1's password: Last login: Mon Jun 8 16:21:12 2009 from imran-laptop.owera.com root@firewall:~ # nano /etc/rc.d/rc.network ## add following for TFTP traffic modprobe ip_conntrack_tftp modprobe ip_nat_tftp Reboot the Firewall to take effect or enter the above command in command line. Further Info: http://keystoneit.wordpress.com/2007/11/25/tftp-through-ipcop-or-other-iptables-firewalls/