THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Assuming you allow all outbound packets out of your machine, you only need to add an INPUT rule to your /etc/sysconfig/iptables file. Add the following line in your INPUT chain, above any deny REJECT rules:
-A <chain-name> -p udp -m udp --sport 6277 -j ACCEPT
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