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iptable - configuration for outbound traffic from local network

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http://serverfault.com – I reinstalled a ClearOS box, which is based on CentOS. The previous install ran fine for 3 years, without a glitch but I may of misconfigured something on this install along the way, as things are not working as they should. Browsing internet does not work when content-filtering is disabled. I used to be able to browse without going through the proxy, but this no longer works unless web proxy is enabled. Idem for ssh traffic. This is much more serious: local network cannot connect to external ssh servers. It seems port 22 is not being allowed out, yet I have the firewall set to allow all e (HowTos)