V-254198

Discussion

Firewalls protect computers from network attacks by blocking or limiting access to open network ports. Application firewalls limit which applications are allowed to communicate over the network.

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Confirm Nutanix AOS prohibits or restricts the use of remote access methods, using the iptables firewall service.

$ sudo service iptables status
iptables.service - IPv4 firewall with iptables
   Loaded: loaded (/usr/lib/systemd/system/iptables.service; enabled; vendor preset: disabled)
   Active: active (exited) since Mon 2021-08-02 15:02:12 CDT; 2 weeks 6 days ago
 Main PID: 1250 (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/iptables.service

If IPv6 is in use:
$ sudo service ip6tables status
ip6tables.service - IPv6 firewall with ip6tables
   Loaded: loaded (/usr/lib/systemd/system/ip6tables.service; enabled; vendor preset: disabled)
   Active: active (exited) since Mon 2021-08-02 15:02:12 CDT; 2 weeks 6 days ago
 Main PID: 1313 (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/ip6tables.service

If no iptables services are "Loaded" and "Active", this is a finding.