If there is no custom firewall policy configured for a network pool, it automatically uses the global default firewall policy. Note that each pool can only have a single firewall policy applied to it. The rules are then organized within a firewall policy, which can be applied to one or more network pools. The individual firewall rules, which are essentially simplified wrappers around ipfw rules, work by matching packets through the 5-tuples that uniquely identify an IPv4 UDP or TCP session: Additionally, being network pool based allows the firewall to support OneFS access zones and shared/multitenancy models. The firewall gracefully handles SmartConnect dynamic IP movement between nodes since firewall policies are applied per network pool. The firewall’s configuration is split between gconfig, which handles the settings and policies, and the ipfw table, which stores the rules themselves. Note that the firewall is only available once a cluster is already running OneFS 9.5 and the feature has been manually enabled, activating the isi_firewall_d service. Under the hood, the OneFS firewall is built upon the ubiquitous ipfirewall, or ipfw, which is FreeBSD’s native stateful firewall, packet filter, and traffic accounting facility.įirewall configuration and management is through the CLI, or platform API, or WebUI, and OneFS 9.5 introduces a new Firewall Configuration page to support this. Limit access to the OneFS Web UI to specific administrator terminals. NOTE: The firewall policies do not automatically update when port configurations are changed. The default firewall policies block all nondefault ports until you change the policies.Ĭompare your cluster network port configurations against the default ports listed in Network port usage.Įdit the default firewall policies to accommodate any non-standard ports in use in the cluster. Network-based firewalls are often dedicated servers or appliances and provide protection for the network.Ensure that the cluster uses a default SSH or HTTP port before enabling. Linux systems support xtables for firewall capabilities. A host-based firewall provides intrusion protection for the host. Host-based firewalls provide protection for individual hosts such as servers or workstations. Many organizations use personal firewalls on each system in addition to network firewalls as part of an Personal firewalls provide valuable protection for systems against unwanted intrusions. You can configure rules within different tables that work similar to how rules within an ACL work. Generically, administrators commonly refer to these as xtables. Linux systems support iptables and many additions such as ipv6tables, arptables, and so on. The connection security rules provide additional capabilities, such as configuring an IPsec connection in Tunnel or Transport mode to encrypt the traffic. Notice that you can configure inbound rules to allow or restrict inbound traffic and outbound rules to allow or restrict outbound traffic. The figure above shows a host-based Windows Firewall on Windows 7. Additionally, many third-party host-based firewalls are available. Many operating systems include software-based firewalls used as host-based firewalls.įor example, Microsoft has included a host-based firewall on operating systems since Windows XP. It monitors traffic passing through the NIC and can prevent intrusions into the computer via the NIC. A host-based firewall monitors traffic going in and out of a single host, such as a server or a workstation.
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