There is a built in firewall in the gateway which after a factory reset is activated with the default rules. These rules blocks outgoing requests so new iptables rules must be added or the firewall can be disabled completely in the following way:

Set the “FIREWALL” parameter to “no” in “/etc/sysconfig/network” configuration file, then restart the network script : /etc/rc.d/init.d/network restart.

disabling the firewall can be done with the following command:

/etc/init.d/firewall stop