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Remove all default firewall rules in oracle cloud permanently
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| # Take backup of iptables | |
| cp /etc/iptables/rules.v4 /etc/iptables/rules.v4.backup | |
| cp /etc/iptables/rules.v6 /etc/iptables/rules.v6.backup | |
| # Flush rules | |
| iptables -F | |
| iptables -X | |
| iptables -t nat -F | |
| iptables -t nat -X | |
| iptables -t mangle -F | |
| iptables -t mangle -X | |
| iptables -P INPUT ACCEPT | |
| iptables -P FORWARD ACCEPT | |
| iptables -P OUTPUT ACCEPT | |
| # Save changes | |
| iptables-save > /etc/iptables/rules.v4 | |
| ip6tables-save > /etc/iptables/rules.v6 |
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