iptables command

How do I flush all IPv4 and IPv6 iptables rules under Ubuntu Linux?

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The NAT based connectivity is useful for easy deployments. However I want to use full bridging, where the guest is connected directly to the LAN. How do setup and share physical network with host and rest of the LAN under Linux?

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How do I read a list of ip address (subnets) using a text file and block all of them using Linux iptables command?

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I‘ve installed keepalived IP failover software as described here. But how do I verify it is working or not?

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SNMP (Simple Network Management Protocol) is a protocol used for network management. How do I install SNMP server under Debian or Ubuntu Linux to configure various monitoring service?

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How do I invert a protocol or ip address test while writing iptables based shell scripts?

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How do I configure a host-based firewall called Netfilter (iptables) under CentOS / RHEL / Fedora / Redhat Enterprise Linux?

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